KX-1 with 30/80 module for sale
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KX-1 with 30/80 module for sale
 
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I have a rarely used KX-1 in excellent condition with the 30/80 module (so it works on 80/40/30/20), Ant Tuner, and paddle. The kit was constructed by a master builder (I got it from another ham and this is what I was told.) I have the manual as well. New with the accessories as a kit it costs about $600.00 with shipping and sales tax. Asking $ 400 plus shipping, $ 15.00 in continental US.
Richard W6RIG reply to: [hidden email] On Jan 1, 2012, at 1:18 PM, [hidden email] wrote: > Send Elecraft mailing list submissions to > [hidden email] > > To subscribe or unsubscribe via the World Wide Web, visit > http://mailman.qth.net/mailman/listinfo/elecraft > or, via email, send a message with subject or body 'help' to > [hidden email] > > You can reach the person managing the list at > [hidden email] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Elecraft digest..." > > > Today's Topics: > > 1. Re: Single Band 40 Meter Dipole (Phil Hystad) > 2. Re: Looking for a KX1 (edward kacura) > 3. Re: Single Band 40 Meter Dipole (Jim Brown) > 4. Re: Single Band 40 Meter Dipole (WILLIS COOKE) > 5. Re: Single Band 40 Meter Dipole (Jim Brown) > 6. Re: open wire feeders (Hank Garretson) > 7. Re: Single Band 40 Meter Dipole (Mike WA8BXN) > 8. Re: Single Band 40 Meter Dipole (Phil Hystad) > 9. Re: Looking for a KX1 (Mike Morrow) > 10. Re: Single Band 40 Meter Dipole (Don Wilhelm) > 11. K3/P3 DOA (Bill Conkling) > 12. K3 second receiver install question ([hidden email]) > 13. Re: K3/P3 DOA (Stephen Prior) > 14. Re: K3: data modes - bizarre behavior (Bill Conkling) > 15. Re: K3/P3 DOA (Sanger, Joseph) > 16. Re: KX3 vs FT817 (comparing apples+oranges) (Shel Radin KF0UR) > 17. Re: K3/P3 DOA (Bill Conkling) > 18. Re: K3/P3 DOA (Jorge) > 19. Re: Single Band 40 Meter Dipole (Don Wilhelm) > 20. K3 Wish List - XIT tell-tale (Tom Boucher) > 21. Re: K3: data modes - bizarre behavior (Matt Zilmer) > 22. Re: K3: data modes - bizarre behavior (Don Wilhelm) > 23. Re: K3: data modes - bizarre behavior (Bill Harris) > 24. Re: K3: data modes - bizarre behavior (Stephen Prior) > 25. Fw: K3: data modes - bizarre behavior (Matthew Pitts) > 26. Re: K3 Wish List - XIT tell-tale (Wayne Burdick) > 27. P3 auto REF LVL adjust? (Mike Markowski) > 28. Re: Single Band 40 Meter Dipole (Bob K6UJ) > 29. Re: K3/P3 DOA (Randy Farmer) > 30. K2 Mic question (Paul W. Van Dyke) > 31. Re: K3: data modes - bizarre behavior (Joe Subich, W4TV) > 32. Re: K3: data modes - bizarre behavior (W4GRJ) > 33. How Long will it take to assemble a K3/100?? > ([hidden email]) > 34. Re: How Long will it take to assemble a K3/100?? (Phil Hystad) > 35. Re: K2 Mic question (Don Wilhelm) > 36. Problem - Elecraft K1 Low Power On 15 Meters (Bruce W1UJR) > 37. Re: K3: data modes - bizarre behavior (Matt Zilmer) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Sun, 1 Jan 2012 09:13:09 -0800 > From: Phil Hystad <[hidden email]> > Subject: Re: [Elecraft] Single Band 40 Meter Dipole > To: [hidden email] > Cc: Elecraft List <[hidden email]> > Message-ID: <[hidden email]> > Content-Type: text/plain; charset=iso-8859-1 > > Don, > > goals: > > 1. Lowest loss. > 2. Full 40-meter band coverage but resonant at 7.1 MHz. > 3. Assume using a tuner (like K3 or KAT500). > 4. Choke common mode currents. > > > Total feed line length will be on the order of 100 feet for this particular dipole. For the 30 meter dipole I also plan to put up, total feed line length is about 75 feet. My 80 meter dipole will be about 100 feet of feedline. > > Before I posted this question to this forum, I would have gone ahead and used the same configuration I used previously when I had my 80 meter doublet up. That antenna was fed by 450 ohm ladder line to a 1:1 balun and then RG-8X to the shack. > > But one motivation for my question is weighing the difference in loss of tuner + 450 ohm ladder line and balun versus a direct run of RG8X right to the feed point with a choke balun at that location. > The RG-8X loss is about 2 dB on that 100 foot run. I could switch to LMR-400 (at 0.7 dB loss) but I am curious about other solutions. > > 73, phil, K7PEH > > > On Jan 1, 2012, at 5:39 AM, Don Wilhelm wrote: > >> Phil, >> >> What do you want to accomplish (other than just an antenna for 40 meters)? Lowest loss? Broadband? Easy- up? Etc? Those parameters will determine your best choice. >> >> Easiest IMHO is to just feed it with coax with a current mode choke at the feedpoint. That should present a less than 2:1 SWR over the entire 40 meter band. >> >> If you have an extremely long feedline (multiples of a half wave), then you might consider using balanced line cut to some multiple of a half wavelength (electrical length) and the rest of the way to the shack with coax - put the common mode choke at the transition between the balanced line and the coax. >> This latter suggestion takes advantage of the fact that an electrical half wave transmission line has the same impedance at both ends - it does not matter what the characteristic impedance of the line may be. >> >> But unless you have a very long distance to the antenna feedpoint, the loss of practical coax runs is rather low on 40 meters, so the easiest is just to use coax. >> >> 73, >> Don W3FPR >> >> On 1/1/2012 12:14 AM, Phil Hystad wrote: >>> OK, lots of discussion on open wire feeders and other ideas so I thought I would throw out a question to soak up some of the Elecraft community knowledge and wisdom. >>> >>> Given a 40-meter dipole antenna, up about 50 feet, what is the best feed configuration for single band usage to minimize loss and minimize common mode currents and radiation from the feed line? >>> >>> I am thinking of building such an antenna and I would have no plans for using it on any other band but I would like to use it on the full spectrum of 40 meters with primary focus on the low end for CW. >>> >>> My current idea is to cut the antenna for 7.1 MHz but I am not sure about the best plan to feed it. I am thinking of 450 ohm window line (aka ladder line) to a 1:1 balun and the coax the rest of the way into the shack. Or, how about 300 ohm twin lead into a 6:1 balun with coax the rest of the way into the shack? Would this be a significant difference? Or, some other combination? >>> >>> Or, maybe a 1:1 balun right at the antenna feed point with coax the remaining distance to the shack? >>> >>> Any comments or suggestions? >>> >>> I am thinking of also raising up two other dipoles. I have room to put up 80, 40, and 30 as separate dipole antennas -- it is actually a little bit more awkward to do a fan dipole so I am leaning on not doing that. >>> >>> 73, phil, K7PEH >>> > > > > ------------------------------ > > Message: 2 > Date: Sun, 1 Jan 2012 09:28:19 -0800 (PST) > From: edward kacura <[hidden email]> > Subject: Re: [Elecraft] Looking for a KX1 > To: [hidden email] > Message-ID: > <[hidden email]> > Content-Type: text/plain; charset=iso-8859-1 > > GM es HNY to all !! > The KX1 was my first Elecraft radio and I used it to?learn (still learning) CW with. As other have stated, it's just too much fun and such a neat little radio for what it does ! I too have a KX3 on order, but for right now, I don't want to part with the little KX1 ! > I also have a K2 and a K1, love them both, I'd considered parting with the K1, but for now have decided to keep the family together as we wait for the newest member !! > Can't wait for the KX3........... > ? > 73 de Ed N7EDK in Marana,AZ. > > ------------------------------ > > Message: 3 > Date: Sun, 01 Jan 2012 09:38:11 -0800 > From: Jim Brown <[hidden email]> > Subject: Re: [Elecraft] Single Band 40 Meter Dipole > To: [hidden email] > Message-ID: <[hidden email]> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > On 12/31/2011 9:14 PM, Phil Hystad wrote: >> Or, maybe a 1:1 balun right at the antenna feed point with coax the remaining distance to the shack? > > No question -- 50 ohm coax wound around one or more #31 or #43 ferrite > cores to form a common mode choke. See > http://audiosystemsgroup.com/RFI-Ham.pdf The choke will completely > kill any radiation or pickup from the feedline. If the antenna were a > lot higher, I'd use 75 ohm coax. And yes, tweak the length for 7.1 MHz. > > Also see two applications notes about "antennas for limited space" on my > website. A single 2-wire fan dipole cut for 80M and 40M and fed with 50 > ohm coax will also work great on 30M, 17M, 15M, and 12M, and using the > same choke to kill feedline current. To minimize feedline loss on 30, > 17, 15, and 12, use RG8 rather than RG8X or RG58. This antenna will work > as well as the single-band 40M dipole on 40M. You WILL need an antenna > tuner, like the KAT3. > > http://audiosystemsgroup.com/publish.htm > > 73, Jim K9YC > > > ------------------------------ > > Message: 4 > Date: Sun, 1 Jan 2012 09:40:27 -0800 (PST) > From: WILLIS COOKE <[hidden email]> > Subject: Re: [Elecraft] Single Band 40 Meter Dipole > To: Phil Hystad <[hidden email]>, "[hidden email]" <[hidden email]> > Cc: Elecraft List <[hidden email]> > Message-ID: <[hidden email]> > Content-Type: text/plain; charset=iso-8859-1 > > Phil, I would put the balun at the center of the antenna and use one that doubles as a center insulator and attach point for the raising rope. ?The loss for RG-8X will be about 1 db, so you will not notice. ?I have had very good luck with attaching an 80 meter dipole to the same coax and balun. ?I have not tried a 30 meter, but I would expect it to work well also. ?I have tried a 80-40-20 fan with no good results. ? I find it best to spread the 80 and 40 at least 30 degrees and probably 90 degrees would be better. ?You could use a second 75/80 dipole for either the phone or CW band or I have had good results by putting insulators in the 80/75 and using?alligator?clip leads when I want the longer antenna. ?The antenna coupler should not be needed for 40 meters or for 80/75 for most of the band is you use the jumpers. > ? > Willis 'Cookie' Cooke > K5EWJ & Trustee N5BPS, USS Cavalla, USS Stewart > > > ________________________________ > From: Phil Hystad <[hidden email]> > To: [hidden email] > Cc: Elecraft List <[hidden email]> > Sent: Sunday, January 1, 2012 11:13 AM > Subject: Re: [Elecraft] Single Band 40 Meter Dipole > > Don, > > goals: > > 1.? Lowest loss. > 2.? Full 40-meter band coverage but resonant at 7.1 MHz. > 3.? Assume using a tuner (like K3 or KAT500). > 4.? Choke common mode currents. > > > Total feed line length will be on the order of 100 feet for this particular dipole.? For the 30 meter dipole I also plan to put up, total feed line length is about 75 feet.? My 80 meter dipole will be about 100 feet of feedline. > > Before I posted this question to this forum, I would have gone ahead and used the same configuration I used previously when I had my 80 meter doublet up.? That antenna was fed by 450 ohm ladder line to a 1:1 balun and then RG-8X to the shack. > > But one motivation for my question is weighing the difference in loss of tuner + 450 ohm ladder line and balun versus a direct run of RG8X right to the feed point with a choke balun at that location. > The RG-8X loss is about 2 dB on that 100 foot run.? I could switch to LMR-400 (at 0.7 dB loss) but I am curious about other solutions. > > 73, phil, K7PEH > > > On Jan 1, 2012, at 5:39 AM, Don Wilhelm wrote: > >> Phil, >> >> What do you want to accomplish (other than just an antenna for 40 meters)?? Lowest loss? Broadband? Easy- up? Etc?? Those parameters will determine your best choice. >> >> Easiest IMHO is to just feed it with coax with a current mode choke at the feedpoint.? That should present a less than 2:1 SWR over the entire 40 meter band. >> >> If you have an extremely long feedline (multiples of a half wave), then you might consider using balanced line cut to some multiple of a half wavelength (electrical length) and the rest of the way to the shack with coax - put the common mode choke at the transition between the balanced line and the coax. >> This latter suggestion takes advantage of the fact that an electrical half wave transmission line has the same impedance at both ends - it does not matter what the characteristic impedance of the line may be. >> >> But unless you have a very long distance to the antenna feedpoint, the loss of practical coax runs is rather low on 40 meters, so the easiest is just to use coax. >> >> 73, >> Don W3FPR >> >> On 1/1/2012 12:14 AM, Phil Hystad wrote: >>> OK, lots of discussion on open wire feeders and other ideas so I thought I would throw out a question to soak up some of the Elecraft community knowledge and wisdom. >>> >>> Given a 40-meter dipole antenna, up about 50 feet, what is the best feed configuration for single band usage to minimize loss and minimize common mode currents and radiation from the feed line? >>> >>> I am thinking of building such an antenna and I would have no plans for using it on any other band but I would like to use it on the full spectrum of 40 meters with primary focus on the low end for CW. >>> >>> My current idea is to cut the antenna for 7.1 MHz but I am not sure about the best plan to feed it.? I am thinking of 450 ohm window line (aka ladder line) to a 1:1 balun and the coax the rest of the way into the shack.? Or, how about 300 ohm twin lead into a 6:1 balun with coax the rest of the way into the shack?? Would this be a significant difference?? Or, some other combination? >>> >>> Or, maybe a 1:1 balun right at the antenna feed point with coax the remaining distance to the shack? >>> >>> Any comments or suggestions? >>> >>> I am thinking of also raising up two other dipoles.? I have room to put up 80, 40, and 30 as separate dipole antennas -- it is actually a little bit more awkward to do a fan dipole so I am leaning on not doing that. >>> >>> 73, phil, K7PEH >>> > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > ------------------------------ > > Message: 5 > Date: Sun, 01 Jan 2012 09:42:40 -0800 > From: Jim Brown <[hidden email]> > Subject: Re: [Elecraft] Single Band 40 Meter Dipole > To: [hidden email] > Message-ID: <[hidden email]> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > On 12/31/2011 9:36 PM, Phil Hystad wrote: >> Or, is that a common mode choke you mean? > > I HATE use of the word "balun," because it is used to describe at least > six very different things. A so-called "current balun"" is really > nothing more than a common mode choke. The chokes I've described in my > tutorial and cookbook are simply much better (and cheaper) common mode > chokes than you can buy for a lot more money. > > As Don says, study the tutorial. > > 73, Jim K9YC > > > ------------------------------ > > Message: 6 > Date: Sun, 1 Jan 2012 09:49:03 -0800 > From: Hank Garretson <[hidden email]> > Subject: Re: [Elecraft] open wire feeders > To: [hidden email] > Message-ID: > <CABD27Unmw+HCqpcHtYHfMkNdVVwoW3bu268Sba=+[hidden email]> > Content-Type: text/plain; charset=ISO-8859-1 > > On Sat, Dec 31, 2011 at 9:35 PM, Don Wilhelm <[hidden email]> wrote: > > Keep in mind that the length of an unmatched feedline is critical to the >> success or failure of such a system. That is a factor that is seldom >> mentioned in posts that say a particular antenna "works well" and "loads >> well" - the simple fact is that the feedline type and length are critical >> elements in that antenna system - to say that a 100 foot dipole works >> great is not sufficient, one needs to state the type and length of the >> feedline as well as the length of the antenna. >> > > > Lots of good comments. I think part of the original post asked about > keeping RF out of the shack. > > Assuming one does a reasonable job of keeping both antenna and open-wire > feedline balanced, there is a fairly easy answer. Operative word here is > "reasonable"--perfection is the enemy of good enough. Don't let all the > horror stories stop you from trying. People, including me, have been using > balanced feeders and center-fed dipoles with good results for a very long > time. > > Here's how to minimize RF in the shack. Make the length of one leg of the > dipole plus the length of the feedline as close as possible (practical) to > an odd multiple of a quarter wavelength at the frequency of interest. With > a dipole, there is an RF voltage maximum at the far end. One quarter > wavelength away there is a voltage minimum, another quarter wavelength > away, a voltage maximum. Etcetera. An odd multiple of quarter wavelengths > puts a voltage minimum in the shack. > > In addition to minimizing RF in the shack, this approach puts minimum RF > voltage and maximum RF current in the shack. This means relatively low > impedance in the shack which means relatively easy job for the tuner. > > This approach is easy for a single band. For multiple bands, it can be > tricky. Again, perfection is the enemy of good enough--just try it. > > There is a useful chart in the 1974 ARRL Antenna Handbook. Chart is posted > at https://picasaweb.google.com/StarrGarretson/Fig353#5692717146409405762 . > L in the chart is total length of one leg of center-fed dipole plus > feedline or total length of antenna plus feedline for an end-fed antenna. > When using the chart, keep in mind, that 1974 was before WARC bands. > > After all of the above, now my experience. For fifty-six years at eleven > locations, my antenna has been an eighty-meter dipole (sometimes very > contorted) or inverted-V put up with whatever supports I could muster. > Open-wire feedline was whatever length was convenient. Using a Johnson > Viking KW Matchbox with either 700 or 1,500 watts output, I rarely had RF > in the shack on all contest bands eighty through ten. The few times I did, > it was simple to add a bit of feedline to solve the problem. > > Be a ham, try it, and have fun. > > > 73, > > Hank, W6SX > > Mammoth Lakes, California > > Elevation 8083 feet in John Muir's Range of Light > > > ------------------------------ > > Message: 7 > Date: Sun, 1 Jan 2012 12:52:05 -0500 > From: Mike WA8BXN <[hidden email]> > Subject: Re: [Elecraft] Single Band 40 Meter Dipole > Cc: [hidden email] > Message-ID: <[hidden email]> > Content-Type: text/plain; charset="iso-8859-1" > > > > A table I looked at suggested that on 7 MHz loss for RG8X would be less than > 1 db for a 100 foot run of it. When dealing with a resonant dipole on the > lower HF bands feedline loss is not a big issue. I would not consider using > open wire feed for such an antenna (unless I wanted to operate on > non-resonant bands with that same antenna). I'm not sure I would even bother > with any sort of choke or balun. I would not expect RF in the shack or noise > problems. If those issues did appear, then I might look into chokes/baluns. > > 73/72 - Mike WA8BXN > Happy New Year all! > > > ------------------------------ > > Message: 8 > Date: Sun, 1 Jan 2012 09:53:02 -0800 > From: Phil Hystad <[hidden email]> > Subject: Re: [Elecraft] Single Band 40 Meter Dipole > To: Elecraft List <[hidden email]> > Message-ID: <[hidden email]> > Content-Type: text/plain; charset=us-ascii > > Guys, > > Thanks for all the responses both on-line here in the group and off-line. Several people pointed me to Jim Brown's (K9YC) paper, including just a few minutes ago, Jim Brown himself (thanks). > > I grabbed the paper last night but was too tired from a half-bottle of champagne to do anything but briefly scan the parts about the common mode chokes. Also, I found a power-point talk by K9YC that I will also go through this morning. > > So, I am pretty sure I will end up doing the Jim Brown solution. That would be an RG8X feed using one of his common mode toroid chokes (though, I do need to read the paper in detail). I guess finding a source for the ferrite toroids is next on my list although I think I saw one referenced in one of the responses (digikey). > > I suppose best placement for the choke is at the center feed point of the dipole but I am a little concerned about the weight. Maybe this is not an issue. By the way, I make my own center insulators with nice screw on brackets and SO-239 connectors. The plastic I use is very tough and I buy it from Tap Plastics. > > PEH > > > On Jan 1, 2012, at 9:13 AM, Phil Hystad wrote: > >> Don, >> >> goals: >> >> 1. Lowest loss. >> 2. Full 40-meter band coverage but resonant at 7.1 MHz. >> 3. Assume using a tuner (like K3 or KAT500). >> 4. Choke common mode currents. >> >> >> Total feed line length will be on the order of 100 feet for this particular dipole. For the 30 meter dipole I also plan to put up, total feed line length is about 75 feet. My 80 meter dipole will be about 100 feet of feedline. >> >> Before I posted this question to this forum, I would have gone ahead and used the same configuration I used previously when I had my 80 meter doublet up. That antenna was fed by 450 ohm ladder line to a 1:1 balun and then RG-8X to the shack. >> >> But one motivation for my question is weighing the difference in loss of tuner + 450 ohm ladder line and balun versus a direct run of RG8X right to the feed point with a choke balun at that location. >> The RG-8X loss is about 2 dB on that 100 foot run. I could switch to LMR-400 (at 0.7 dB loss) but I am curious about other solutions. >> >> 73, phil, K7PEH >> >> >> On Jan 1, 2012, at 5:39 AM, Don Wilhelm wrote: >> >>> Phil, >>> >>> What do you want to accomplish (other than just an antenna for 40 meters)? Lowest loss? Broadband? Easy- up? Etc? Those parameters will determine your best choice. >>> >>> Easiest IMHO is to just feed it with coax with a current mode choke at the feedpoint. That should present a less than 2:1 SWR over the entire 40 meter band. >>> >>> If you have an extremely long feedline (multiples of a half wave), then you might consider using balanced line cut to some multiple of a half wavelength (electrical length) and the rest of the way to the shack with coax - put the common mode choke at the transition between the balanced line and the coax. >>> This latter suggestion takes advantage of the fact that an electrical half wave transmission line has the same impedance at both ends - it does not matter what the characteristic impedance of the line may be. >>> >>> But unless you have a very long distance to the antenna feedpoint, the loss of practical coax runs is rather low on 40 meters, so the easiest is just to use coax. >>> >>> 73, >>> Don W3FPR >>> >>> On 1/1/2012 12:14 AM, Phil Hystad wrote: >>>> OK, lots of discussion on open wire feeders and other ideas so I thought I would throw out a question to soak up some of the Elecraft community knowledge and wisdom. >>>> >>>> Given a 40-meter dipole antenna, up about 50 feet, what is the best feed configuration for single band usage to minimize loss and minimize common mode currents and radiation from the feed line? >>>> >>>> I am thinking of building such an antenna and I would have no plans for using it on any other band but I would like to use it on the full spectrum of 40 meters with primary focus on the low end for CW. >>>> >>>> My current idea is to cut the antenna for 7.1 MHz but I am not sure about the best plan to feed it. I am thinking of 450 ohm window line (aka ladder line) to a 1:1 balun and the coax the rest of the way into the shack. Or, how about 300 ohm twin lead into a 6:1 balun with coax the rest of the way into the shack? Would this be a significant difference? Or, some other combination? >>>> >>>> Or, maybe a 1:1 balun right at the antenna feed point with coax the remaining distance to the shack? >>>> >>>> Any comments or suggestions? >>>> >>>> I am thinking of also raising up two other dipoles. I have room to put up 80, 40, and 30 as separate dipole antennas -- it is actually a little bit more awkward to do a fan dipole so I am leaning on not doing that. >>>> >>>> 73, phil, K7PEH >>>> >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > > > > ------------------------------ > > Message: 9 > Date: Sun, 1 Jan 2012 11:53:03 -0600 (GMT-06:00) > From: Mike Morrow <[hidden email]> > Subject: Re: [Elecraft] Looking for a KX1 > To: [hidden email] > Message-ID: > <[hidden email]> > > Content-Type: text/plain; charset=UTF-8 > > Ed wrote: > >> I'd considered parting with the K1, but for now have decided to keep >> the family together as we wait for the newest member !! > > The K1 has demonstrably better RF performance in most particulars than the > KX1 for ham band CW operation, except for size, crystal-like stability, > and audio prompts. But even if the KX1 was on a par with the K1, the most > important advantage of the K1 has once again become apparent as the solar > cycle improves...it covers 15 meters and it does that very well! The KX1 > can *not* do that, due to DDS limitations. When open, 15 meters is the > finest of bands for QRP operation. > > I too look forward to the KX3. But it won't replace my K1, whose receive > current consumption is one-third that of the KX3's most frugal configuration. > > 73, > Mike / KK5F > > > ------------------------------ > > Message: 10 > Date: Sun, 01 Jan 2012 12:57:40 -0500 > From: Don Wilhelm <[hidden email]> > Subject: Re: [Elecraft] Single Band 40 Meter Dipole > To: Phil Hystad <[hidden email]> > Cc: Elecraft List <[hidden email]> > Message-ID: <[hidden email]> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Phil, > > 100 feet of coax (RG-8X) has less than 1 dB loss at 40 meters - RG-213 > is less loss, so I recommend using coax unless you have the patience for > properly supporting a balanced feedline. What I am saying is that you > will not gain very much with lower loss balanced line. Be aware when > using the popular window line that it gets lossy when it is wet, in fact > some have reported more loss than small coax. > > You should have less than 2:1 SWR over the entire 40 meter band if you > pick the center frequency correctly. > > 73, > Don W3FPR > > On 1/1/2012 12:13 PM, Phil Hystad wrote: >> Don, >> >> goals: >> >> 1. Lowest loss. >> 2. Full 40-meter band coverage but resonant at 7.1 MHz. >> 3. Assume using a tuner (like K3 or KAT500). >> 4. Choke common mode currents. >> >> >> Total feed line length will be on the order of 100 feet for this particular dipole. For the 30 meter dipole I also plan to put up, total feed line length is about 75 feet. My 80 meter dipole will be about 100 feet of feedline. >> >> Before I posted this question to this forum, I would have gone ahead and used the same configuration I used previously when I had my 80 meter doublet up. That antenna was fed by 450 ohm ladder line to a 1:1 balun and then RG-8X to the shack. >> >> But one motivation for my question is weighing the difference in loss of tuner + 450 ohm ladder line and balun versus a direct run of RG8X right to the feed point with a choke balun at that location. >> The RG-8X loss is about 2 dB on that 100 foot run. I could switch to LMR-400 (at 0.7 dB loss) but I am curious about other solutions. >> >> 73, phil, K7PEH >> >> >> On Jan 1, 2012, at 5:39 AM, Don Wilhelm wrote: >> >>> Phil, >>> >>> What do you want to accomplish (other than just an antenna for 40 meters)? Lowest loss? Broadband? Easy- up? Etc? Those parameters will determine your best choice. >>> >>> Easiest IMHO is to just feed it with coax with a current mode choke at the feedpoint. That should present a less than 2:1 SWR over the entire 40 meter band. >>> >>> If you have an extremely long feedline (multiples of a half wave), then you might consider using balanced line cut to some multiple of a half wavelength (electrical length) and the rest of the way to the shack with coax - put the common mode choke at the transition between the balanced line and the coax. >>> This latter suggestion takes advantage of the fact that an electrical half wave transmission line has the same impedance at both ends - it does not matter what the characteristic impedance of the line may be. >>> >>> But unless you have a very long distance to the antenna feedpoint, the loss of practical coax runs is rather low on 40 meters, so the easiest is just to use coax. >>> >>> 73, >>> Don W3FPR >>> >>> On 1/1/2012 12:14 AM, Phil Hystad wrote: >>>> OK, lots of discussion on open wire feeders and other ideas so I thought I would throw out a question to soak up some of the Elecraft community knowledge and wisdom. >>>> >>>> Given a 40-meter dipole antenna, up about 50 feet, what is the best feed configuration for single band usage to minimize loss and minimize common mode currents and radiation from the feed line? >>>> >>>> I am thinking of building such an antenna and I would have no plans for using it on any other band but I would like to use it on the full spectrum of 40 meters with primary focus on the low end for CW. >>>> >>>> My current idea is to cut the antenna for 7.1 MHz but I am not sure about the best plan to feed it. I am thinking of 450 ohm window line (aka ladder line) to a 1:1 balun and the coax the rest of the way into the shack. Or, how about 300 ohm twin lead into a 6:1 balun with coax the rest of the way into the shack? Would this be a significant difference? Or, some other combination? >>>> >>>> Or, maybe a 1:1 balun right at the antenna feed point with coax the remaining distance to the shack? >>>> >>>> Any comments or suggestions? >>>> >>>> I am thinking of also raising up two other dipoles. I have room to put up 80, 40, and 30 as separate dipole antennas -- it is actually a little bit more awkward to do a fan dipole so I am leaning on not doing that. >>>> >>>> 73, phil, K7PEH >>>> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> > > > ------------------------------ > > Message: 11 > Date: Sun, 1 Jan 2012 13:09:53 -0500 > From: "Bill Conkling" <[hidden email]> > Subject: [Elecraft] K3/P3 DOA > To: <[hidden email]> > Cc: [hidden email] > Message-ID: <CF029DA5208E44EE9658AD1E9C3744C1@Tomahawk> > Content-Type: text/plain; charset="us-ascii" > > Friends, > > > > My good friend and elmer Mark (n1lo) recently purchased a pre-loved K3 and > treated himself to a P3-K for Christmas. I visited him yesterday, and > watched as he assembled his new 'toy'. All went pretty well, until we > hooked it up. It all seems to work, except, there is no signal showing on > the P3 screen. All the markings are there, display seems to be working, but > no signal. Adjusting the "REF LVL" brings up 'noise' but removing the BNC > cable does not change the display. > > > > Tried connecting to the IF OUT connector and turning the switch 'ON' made no > difference. > > > > Tried another BNC cable, same result. > > > > Opened the P3 and checked the TMP cable but it was firmly connected at both > ends. No change. > > > > He has emailed support for assistance but it is New Years and may not hear > anything immediately as expected with the holiday and all. > > > > So, it the mean time, anyone here have an idea that we haven't thought of? > > > > He did the mod to the radio to increase the output, but that looks good. > > > > ...bill nr4c (for Mark n1lo) > > > > ------------------------------ > > Message: 12 > Date: Sun, 1 Jan 2012 13:15:10 -0500 (EST) > From: [hidden email] > Subject: [Elecraft] K3 second receiver install question > To: [hidden email] > Message-ID: <[hidden email]> > Content-Type: text/plain; charset=UTF-8; format=flowed; delsp=no > > I am thinking about purchasing and installing a sub-receiver for working > split and diversity. > > When reading the installation guide there is a section called Checking > and Modifying Resistor R91 and DAC Input Circuits. I have a 1 year old > K3 SN 4912 is it safe to assume that this is already incorporated in my > rig. I dont solder real well and dont feel confortable with the idea > of cutting traces. > > Thanks > > Happy New Year > > ~73 > Don > KD8NNU > > > > ------------------------------ > > Message: 13 > Date: Sun, 1 Jan 2012 18:15:41 +0000 > From: Stephen Prior <[hidden email]> > Subject: Re: [Elecraft] K3/P3 DOA > To: Bill Conkling <[hidden email]>, Elecraft > <[hidden email]> > Message-ID: > <CA+vZ_++oNzgocT=+OC87g8QdcKZtjYfnYF=[hidden email]> > Content-Type: text/plain; charset=ISO-8859-1 > > Look carefully at whether the two bnc connectors on the rear panel are in > the right positions. It is possible (although not easy) to have them > reversed. > > 73 Stephen G4SJP > > > > On 1 January 2012 18:09, Bill Conkling <[hidden email]> wrote: > >> Friends, >> >> >> >> My good friend and elmer Mark (n1lo) recently purchased a pre-loved K3 and >> treated himself to a P3-K for Christmas. I visited him yesterday, and >> watched as he assembled his new 'toy'. All went pretty well, until we >> hooked it up. It all seems to work, except, there is no signal showing on >> the P3 screen. All the markings are there, display seems to be working, >> but >> no signal. Adjusting the "REF LVL" brings up 'noise' but removing the BNC >> cable does not change the display. >> >> >> >> Tried connecting to the IF OUT connector and turning the switch 'ON' made >> no >> difference. >> >> >> >> Tried another BNC cable, same result. >> >> >> >> Opened the P3 and checked the TMP cable but it was firmly connected at both >> ends. No change. >> >> >> >> He has emailed support for assistance but it is New Years and may not hear >> anything immediately as expected with the holiday and all. >> >> >> >> So, it the mean time, anyone here have an idea that we haven't thought of? >> >> >> >> He did the mod to the radio to increase the output, but that looks good. >> >> >> >> ...bill nr4c (for Mark n1lo) >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> > > > ------------------------------ > > Message: 14 > Date: Sun, 1 Jan 2012 13:21:51 -0500 > From: "Bill Conkling" <[hidden email]> > Subject: Re: [Elecraft] K3: data modes - bizarre behavior > To: <[hidden email]>, <[hidden email]> > Message-ID: <43FDD26869624202A42DAA6204F7DCD2@Tomahawk> > Content-Type: text/plain; charset="us-ascii" > > Well, this is normal for digital mode DATA A. I'm not familiar with your > particular software, but for PSK31 and similar modes, the K3 VFO A is set to > a frequency for the carrier. The audio is on the upper sideband, and is > centered in the 3 KHz passband which is 1.5kHz up from the carrier. Thus > the offset. Some digital software has an allowance for an offset, but I'm > not sure about yours. You might check on this. > > Typically if operating on 20 meters with radio set to 14.070MHz, the > waterfall will be full of traces at audio frequencies spread across the > passband of your radio. So you actual transmission freq is the sum of VFO > plus the audio. > > ...bill nr4c > > -----Original Message----- > From: Matt Zilmer [mailto:[hidden email]] > Sent: Sunday, January 01, 2012 11:31 AM > To: [hidden email] > Subject: [Elecraft] K3: data modes - bizarre behavior > > In all this time with K3 #24, I've never been stymied by any issue > such as described below. > > I'm a Navy-Marine Corps MARS member. We use RMS Express in the WL2K > system on HF, running WL2K Winmor mode The software I have is version > 1.1.3.0. > > I also use LP Bridge to create two COM ports: one used for DTR (PTT) > and the other for control, COM19 and COM20 respectively. The sound > card is an EMU 0202. > > The problem is this: When RMS Express takes control of the K3, > calling an RMS node on HF *always* results in the receive frequency > being 1.5 KHz too high. I've had to rotate the RIT between call-up > transmissions to get the RX on frequency before the initial 5 attempts > time out. The TX frequency seems dead-on, because the RMS always > answers - but RX is 1.5 KHz high. And yes, I've tested with multiple > RMS nodes, including my own NMCM RMS here at the shack. Same problem > occurs with each, so it's a setup issue with software or the K3 here. > > RMS Express sends the following commands after it's set the COM20 comm > parameters: > > FR0; # cancel split > RT0; # RIT OFF > XT0; # XIT OFF > MD6; # TX DATA mode > DT0; # DATA A sub-mode of TX DATA > > The sequence above is sent once at the beginning of an RMS Express > call-up of the remote node. Only COM19's DTR is used to assert PTT > for transmissions. > > Just for grins, I checked the various meta-modes the K3 is in. I > discovered that even though AI is set to ZERO, I'm still getting IF > annunciations back from the K3. Odd, that. > > K31; # K3 extended commands enabled > K22; # K2 extended " " > AI0; # AUTOINF OFF > > Since split and the incremental controls are off and ZEROed, I'm > totally blind to what's going on. VFO A is on the correct frequency > in each case (for each RMS Node), which means to me that RX and TX > actual frequencies should be the same. > > Any ideas what's causing this? > > 73 and HNY, > matt W6NIA, NNN0UET > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > > > ------------------------------ > > Message: 15 > Date: Sun, 1 Jan 2012 13:22:28 -0500 > From: "Sanger, Joseph" <[hidden email]> > Subject: Re: [Elecraft] K3/P3 DOA > To: Bill Conkling <[hidden email]>, "[hidden email]" > <[hidden email]> > Cc: "[hidden email]" <[hidden email]> > Message-ID: > <[hidden email]> > Content-Type: text/plain; charset="us-ascii" > > I had the exact symptom when I first built my P3 .... I had installed the RF board in the P3 upside down (yes, it is possible to do so!), so I was actually connecting the IF in to the output jack of the P3 instead of the input jack ... silly error ... perhaps you can benefit from you carelessness and that is your problem? > > -----Original Message----- > From: [hidden email] [mailto:[hidden email]] On Behalf Of Bill Conkling > Sent: Sunday, January 01, 2012 1:10 PM > To: [hidden email] > Cc: [hidden email] > Subject: [Elecraft] K3/P3 DOA > > Friends, > > > > My good friend and elmer Mark (n1lo) recently purchased a pre-loved K3 and treated himself to a P3-K for Christmas. I visited him yesterday, and watched as he assembled his new 'toy'. All went pretty well, until we hooked it up. It all seems to work, except, there is no signal showing on the P3 screen. All the markings are there, display seems to be working, but no signal. Adjusting the "REF LVL" brings up 'noise' but removing the BNC cable does not change the display. > > > > Tried connecting to the IF OUT connector and turning the switch 'ON' made no difference. > > > > Tried another BNC cable, same result. > > > > Opened the P3 and checked the TMP cable but it was firmly connected at both ends. No change. > > > > He has emailed support for assistance but it is New Years and may not hear anything immediately as expected with the holiday and all. > > > > So, it the mean time, anyone here have an idea that we haven't thought of? > > > > He did the mod to the radio to increase the output, but that looks good. > > > > ...bill nr4c (for Mark n1lo) > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > ------------------------------------------------------------ > This email message, including any attachments, is for the sole use of the intended recipient(s) and may contain information that is proprietary, confidential, and exempt from disclosure under applicable law. Any unauthorized review, use, disclosure, or distribution is prohibited. If you have received this email in error please notify the sender by return email and delete the original message. Please note, the recipient should check this email and any attachments for the presence of viruses. The organization accepts no liability for any damage caused by any virus transmitted by this email. > ================================= > > > > ------------------------------ > > Message: 16 > Date: Sun, 1 Jan 2012 10:22:24 -0800 (PST) > From: Shel Radin KF0UR <[hidden email]> > Subject: Re: [Elecraft] KX3 vs FT817 (comparing apples+oranges) > To: [hidden email] > Message-ID: <[hidden email]> > Content-Type: text/plain; charset=us-ascii > > Greetings, > > As others have stated well, there are as many objectives for the KX3 and > FT-817 as there are users. > > For me, the KX3 fills the bill that multiple rigs have filled in the past. > I use a KX1 on the trails here in the Rockies. It's a fantastic radio and I > love using it. I picked up an FT-817 two years ago to round out the bands > and modes I didn't have with the KX1. It was nice having SSB and 6M, for > example. The SSB was particularly nice when I had non-ham friends with me. > Their CW was poor :-). With SSB, they could participate (and maybe get > interested in the hobby?). But I always used the KX1 when I could because > of its vastly superior currently draw. > > Enter the KX3. For me, it was better in a number of ways for my situation. > - small and easier than taking two radios > - lighter than the FT-817 alone > - built in antenna tuner. I carried a T-1 for use with the FT-817 > - PSK31 and RTTY without taking another device like a netbook. A great, > great plus. > > So I will use the KX3 as my one and only in the field from now on (well, > after it's delivered). I already sold my FT-817. And who knows, maybe I'll > get the 100W amp/tuner thingy as a backup for or second station to my K3 > /P3. > > 72, 73 & happy trails, > > Shel KF0UR > > > -- > View this message in context: http://elecraft.365791.n2.nabble.com/KX3-vs-FT817-comparing-apples-oranges-tp7139599p7142361.html > Sent from the Elecraft mailing list archive at Nabble.com. > > > ------------------------------ > > Message: 17 > Date: Sun, 1 Jan 2012 13:24:34 -0500 > From: "Bill Conkling" <[hidden email]> > Subject: Re: [Elecraft] K3/P3 DOA > To: "'Stephen Prior'" <[hidden email]>, "'Elecraft'" > <[hidden email]> > Message-ID: <2F44B47EB18249E5A125AD9028E5360F@Tomahawk> > Content-Type: text/plain; charset="us-ascii" > > Thanks, but checked that as well. I don't believe the assembly will fit > with the switch protruding the panel if reversed. > > > > Thanks for the reply. > > > > ...bill nr4c > > > > _____ > > From: Stephen Prior [mailto:[hidden email]] > Sent: Sunday, January 01, 2012 1:16 PM > To: Bill Conkling; Elecraft > Subject: Re: [Elecraft] K3/P3 DOA > > > > Look carefully at whether the two bnc connectors on the rear panel are in > the right positions. It is possible (although not easy) to have them > reversed. > > > > 73 Stephen G4SJP > > > > > > On 1 January 2012 18:09, Bill Conkling <[hidden email]> wrote: > > Friends, > > > > My good friend and elmer Mark (n1lo) recently purchased a pre-loved K3 and > treated himself to a P3-K for Christmas. I visited him yesterday, and > watched as he assembled his new 'toy'. All went pretty well, until we > hooked it up. It all seems to work, except, there is no signal showing on > the P3 screen. All the markings are there, display seems to be working, but > no signal. Adjusting the "REF LVL" brings up 'noise' but removing the BNC > cable does not change the display. > > > > Tried connecting to the IF OUT connector and turning the switch 'ON' made no > difference. > > > > Tried another BNC cable, same result. > > > > Opened the P3 and checked the TMP cable but it was firmly connected at both > ends. No change. > > > > He has emailed support for assistance but it is New Years and may not hear > anything immediately as expected with the holiday and all. > > > > So, it the mean time, anyone here have an idea that we haven't thought of? > > > > He did the mod to the radio to increase the output, but that looks good. > > > > ...bill nr4c (for Mark n1lo) > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > > > > > ------------------------------ > > Message: 18 > Date: Sun, 01 Jan 2012 12:25:37 -0600 > From: Jorge <[hidden email]> > Subject: Re: [Elecraft] K3/P3 DOA > Cc: Elecraft <[hidden email]> > Message-ID: <[hidden email]> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Bill, > > I had a similar problem. > I found the output of the IF connector on the back of the K3 to be > shorted on the RF board end of the pigtail. A solder bridge was the culprit. > If you have another receiver capable of tuning around 8.125mhz, you > might try hooking the IF output of the K3 to the receiver and see if you > hear the IF signal. > Jorge - KC5RY > > Stephen Prior wrote: >> Look carefully at whether the two bnc connectors on the rear panel are in >> the right positions. It is possible (although not easy) to have them >> reversed. >> >> 73 Stephen G4SJP >> >> >> >> On 1 January 2012 18:09, Bill Conkling<[hidden email]> wrote: >> >>> Friends, >>> >>> >>> >>> My good friend and elmer Mark (n1lo) recently purchased a pre-loved K3 and >>> treated himself to a P3-K for Christmas. I visited him yesterday, and >>> watched as he assembled his new 'toy'. All went pretty well, until we >>> hooked it up. It all seems to work, except, there is no signal showing on >>> the P3 screen. All the markings are there, display seems to be working, >>> but >>> no signal. Adjusting the "REF LVL" brings up 'noise' but removing the BNC >>> cable does not change the display. >>> >>> >>> >>> Tried connecting to the IF OUT connector and turning the switch 'ON' made >>> no >>> difference. >>> >>> >>> >>> Tried another BNC cable, same result. >>> >>> >>> >>> Opened the P3 and checked the TMP cable but it was firmly connected at both >>> ends. No change. >>> >>> >>> >>> He has emailed support for assistance but it is New Years and may not hear >>> anything immediately as expected with the holiday and all. >>> >>> >>> >>> So, it the mean time, anyone here have an idea that we haven't thought of? >>> >>> >>> >>> He did the mod to the radio to increase the output, but that looks good. >>> >>> >>> >>> ...bill nr4c (for Mark n1lo) >>> >>> ______________________________________________________________ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:[hidden email] >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >>> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > > > ------------------------------ > > Message: 19 > Date: Sun, 01 Jan 2012 13:27:00 -0500 > From: Don Wilhelm <[hidden email]> > Subject: Re: [Elecraft] Single Band 40 Meter Dipole > To: [hidden email] > Message-ID: <[hidden email]> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Willis, > > I use two inverted vees mounted at right angles to each other for 80 and > 40 meters, no interaction that way. > The feedline may be of interest - it is a Transmission Line Resonator to > make the 80 meter antenna broadbanded - it consists of 1 wavelength of > RG-8 (that includes the balun) followed by a quarter wave of RG-11. The > SWR is below 2:1 except at the very top of 75 meters. You can find the > antenna in the 19th edition of the ARRL Antenna Handbook page 9-16. It > works quite well for me. > > I also use 2 fan dipoles - one for 30, 17, and 12 meters, and anther for > 20, 15, and 10 meters. I use PVC for spreaders and keep the antenna > wires separated by about 6 inches. > > 73, > Don W3FPR > > On 1/1/2012 12:40 PM, WILLIS COOKE wrote: >> Phil, I would put the balun at the center of the antenna and use one that doubles as a center insulator and attach point for the raising rope. The loss for RG-8X will be about 1 db, so you will not notice. I have had very good luck with attaching an 80 meter dipole to the same coax and balun. I have not tried a 30 meter, but I would expect it to work well also. I have tried a 80-40-20 fan with no good results. I find it best to spread the 80 and 40 at least 30 degrees and probably 90 degrees would be better. You could use a second 75/80 dipole for either the phone or CW band or I have had good results by putting insulators in the 80/75 and using alligator clip leads when I want the longer antenna. The antenna coupler should not be needed for 40 meters or for 80/75 for most of the band is you use the jumpers. >> >> Willis 'Cookie' Cooke >> K5EWJ& Trustee N5BPS, USS Cavalla, USS Stewart >> >> >> ________________________________ >> From: Phil Hystad<[hidden email]> >> To: [hidden email] >> Cc: Elecraft List<[hidden email]> >> Sent: Sunday, January 1, 2012 11:13 AM >> Subject: Re: [Elecraft] Single Band 40 Meter Dipole >> >> Don, >> >> goals: >> >> 1. Lowest loss. >> 2. Full 40-meter band coverage but resonant at 7.1 MHz. >> 3. Assume using a tuner (like K3 or KAT500). >> 4. Choke common mode currents. >> >> >> Total feed line length will be on the order of 100 feet for this particular dipole. For the 30 meter dipole I also plan to put up, total feed line length is about 75 feet. My 80 meter dipole will be about 100 feet of feedline. >> >> Before I posted this question to this forum, I would have gone ahead and used the same configuration I used previously when I had my 80 meter doublet up. That antenna was fed by 450 ohm ladder line to a 1:1 balun and then RG-8X to the shack. >> >> But one motivation for my question is weighing the difference in loss of tuner + 450 ohm ladder line and balun versus a direct run of RG8X right to the feed point with a choke balun at that location. >> The RG-8X loss is about 2 dB on that 100 foot run. I could switch to LMR-400 (at 0.7 dB loss) but I am curious about other solutions. >> >> 73, phil, K7PEH >> >> >> On Jan 1, 2012, at 5:39 AM, Don Wilhelm wrote: >> >>> Phil, >>> >>> What do you want to accomplish (other than just an antenna for 40 meters)? Lowest loss? Broadband? Easy- up? Etc? Those parameters will determine your best choice. >>> >>> Easiest IMHO is to just feed it with coax with a current mode choke at the feedpoint. That should present a less than 2:1 SWR over the entire 40 meter band. >>> >>> If you have an extremely long feedline (multiples of a half wave), then you might consider using balanced line cut to some multiple of a half wavelength (electrical length) and the rest of the way to the shack with coax - put the common mode choke at the transition between the balanced line and the coax. >>> This latter suggestion takes advantage of the fact that an electrical half wave transmission line has the same impedance at both ends - it does not matter what the characteristic impedance of the line may be. >>> >>> But unless you have a very long distance to the antenna feedpoint, the loss of practical coax runs is rather low on 40 meters, so the easiest is just to use coax. >>> >>> 73, >>> Don W3FPR >>> >>> On 1/1/2012 12:14 AM, Phil Hystad wrote: >>>> OK, lots of discussion on open wire feeders and other ideas so I thought I would throw out a question to soak up some of the Elecraft community knowledge and wisdom. >>>> >>>> Given a 40-meter dipole antenna, up about 50 feet, what is the best feed configuration for single band usage to minimize loss and minimize common mode currents and radiation from the feed line? >>>> >>>> I am thinking of building such an antenna and I would have no plans for using it on any other band but I would like to use it on the full spectrum of 40 meters with primary focus on the low end for CW. >>>> >>>> My current idea is to cut the antenna for 7.1 MHz but I am not sure about the best plan to feed it. I am thinking of 450 ohm window line (aka ladder line) to a 1:1 balun and the coax the rest of the way into the shack. Or, how about 300 ohm twin lead into a 6:1 balun with coax the rest of the way into the shack? Would this be a significant difference? Or, some other combination? >>>> >>>> Or, maybe a 1:1 balun right at the antenna feed point with coax the remaining distance to the shack? >>>> >>>> Any comments or suggestions? >>>> >>>> I am thinking of also raising up two other dipoles. I have room to put up 80, 40, and 30 as separate dipole antennas -- it is actually a little bit more awkward to do a fan dipole so I am leaning on not doing that. >>>> >>>> 73, phil, K7PEH >>>> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> > > > ------------------------------ > > Message: 20 > Date: Sun, 1 Jan 2012 19:07:58 -0000 > From: "Tom Boucher" <[hidden email]> > Subject: [Elecraft] K3 Wish List - XIT tell-tale > To: "Reflector Posting Elecraft" <Elecraft @ mailman.qth.net> > Message-ID: <AAB5728FA2AC4A769D78D31921BA6FAD@Tom> > Content-Type: text/plain; charset="iso-8859-1" > > I guess Elecraft are now beyond wanting to make relatively minor changes to the K3 as it is now a mature product, but how about this? On two occasions recently I have been in QSO with a weak distant station on 160 or 80 and a very loud EU has come up on the same frequency with a QRL? On my reply of 'R Pse QSY' the other station ignores me and begins a long and loud CQ thus wiping out the one I'm trying to work. Both times I established that the interfering station was using a K3 and had inadvertently left the 'XIT' function on, thus transmitting on a different frequency to that he was listening on. > > The yellow 'delta f' tell-tale LED is there to tell you that either the RIT or XIT function is on, but if you are already using the RIT function, there is nothing to tell you that XIT is also on. Would it be a simple firmware mod to make the lamp flash on and off when XIT is active? > > 73 > Tom G3OLB > > ------------------------------ > > Message: 21 > Date: Sun, 01 Jan 2012 11:25:01 -0800 > From: Matt Zilmer <[hidden email]> > Subject: Re: [Elecraft] K3: data modes - bizarre behavior > To: "Bill Conkling" <[hidden email]> > Cc: [hidden email] > Message-ID: <[hidden email]> > Content-Type: text/plain; charset=us-ascii > > Thanks for your reply, Bill. > > I verified that the software is setting the correct carrier freq, > based on the center freq cited by the MARS frequency matrix. I was > thinking along the same lines as your suggestion below. > > If I use program control to set the freq, then I get TX + 1.5 KHz = > RX. This is with split disabled and RIT / XIT turned off. > > Temporarily, I'm manually setting the carrier freq to 1.5 KHz below > center instead of relying on the control program to do this. That > solved the problem, but doesn't explain why the radio has carrier freq > centered on the freq only under program control. > > Mysteries.... > > 73, > matt W6NIA / NNN0UET > > > > On Sun, 01 Jan 2012 13:21:51 -0500, you wrote: > >> Well, this is normal for digital mode DATA A. I'm not familiar with your >> particular software, but for PSK31 and similar modes, the K3 VFO A is set to >> a frequency for the carrier. The audio is on the upper sideband, and is >> centered in the 3 KHz passband which is 1.5kHz up from the carrier. Thus >> the offset. Some digital software has an allowance for an offset, but I'm >> not sure about yours. You might check on this. >> >> Typically if operating on 20 meters with radio set to 14.070MHz, the >> waterfall will be full of traces at audio frequencies spread across the >> passband of your radio. So you actual transmission freq is the sum of VFO >> plus the audio. >> >> ...bill nr4c >> >> -----Original Message----- >> From: Matt Zilmer [mailto:[hidden email]] >> Sent: Sunday, January 01, 2012 11:31 AM >> To: [hidden email] >> Subject: [Elecraft] K3: data modes - bizarre behavior >> >> In all this time with K3 #24, I've never been stymied by any issue >> such as described below. >> >> I'm a Navy-Marine Corps MARS member. We use RMS Express in the WL2K >> system on HF, running WL2K Winmor mode The software I have is version >> 1.1.3.0. >> >> I also use LP Bridge to create two COM ports: one used for DTR (PTT) >> and the other for control, COM19 and COM20 respectively. The sound >> card is an EMU 0202. >> >> The problem is this: When RMS Express takes control of the K3, >> calling an RMS node on HF *always* results in the receive frequency >> being 1.5 KHz too high. I've had to rotate the RIT between call-up >> transmissions to get the RX on frequency before the initial 5 attempts >> time out. The TX frequency seems dead-on, because the RMS always >> answers - but RX is 1.5 KHz high. And yes, I've tested with multiple >> RMS nodes, including my own NMCM RMS here at the shack. Same problem >> occurs with each, so it's a setup issue with software or the K3 here. >> >> RMS Express sends the following commands after it's set the COM20 comm >> parameters: >> >> FR0; # cancel split >> RT0; # RIT OFF >> XT0; # XIT OFF >> MD6; # TX DATA mode >> DT0; # DATA A sub-mode of TX DATA >> >> The sequence above is sent once at the beginning of an RMS Express >> call-up of the remote node. Only COM19's DTR is used to assert PTT >> for transmissions. >> >> Just for grins, I checked the various meta-modes the K3 is in. I >> discovered that even though AI is set to ZERO, I'm still getting IF >> annunciations back from the K3. Odd, that. >> >> K31; # K3 extended commands enabled >> K22; # K2 extended " " >> AI0; # AUTOINF OFF >> >> Since split and the incremental controls are off and ZEROed, I'm >> totally blind to what's going on. VFO A is on the correct frequency >> in each case (for each RMS Node), which means to me that RX and TX >> actual frequencies should be the same. >> >> Any ideas what's causing this? >> >> 73 and HNY, >> matt W6NIA, NNN0UET >> >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > > > ------------------------------ > > Message: 22 > Date: Sun, 01 Jan 2012 14:48:58 -0500 > From: Don Wilhelm <[hidden email]> > Subject: Re: [Elecraft] K3: data modes - bizarre behavior > To: [hidden email] > Cc: [hidden email] > Message-ID: <[hidden email]> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Matt, > > I too believe your software does not compensate for how the K3 handles > (and displays) the frequency when in DATA A mode. The K3 indicates the > suppressed carrier frequency rather than the Passband center frequency. > > It sounds like your software is trying to set the K3 to the channel > center frequency. Just as a guess, that might be SOP for government > gear, but not for most ham rigs which refer to the suppressed carrier > frequency.. > > 73, > Don W3FPR > > On 1/1/2012 2:25 PM, Matt Zilmer wrote: >> Thanks for your reply, Bill. >> >> I verified that the software is setting the correct carrier freq, >> based on the center freq cited by the MARS frequency matrix. I was >> thinking along the same lines as your suggestion below. >> >> If I use program control to set the freq, then I get TX + 1.5 KHz = >> RX. This is with split disabled and RIT / XIT turned off. >> >> Temporarily, I'm manually setting the carrier freq to 1.5 KHz below >> center instead of relying on the control program to do this. That >> solved the problem, but doesn't explain why the radio has carrier freq >> centered on the freq only under program control. >> >> Mysteries.... >> >> 73, >> matt W6NIA / NNN0UET >> >> >> >> On Sun, 01 Jan 2012 13:21:51 -0500, you wrote: >> >>> Well, this is normal for digital mode DATA A. I'm not familiar with your >>> particular software, but for PSK31 and similar modes, the K3 VFO A is set to >>> a frequency for the carrier. The audio is on the upper sideband, and is >>> centered in the 3 KHz passband which is 1.5kHz up from the carrier. Thus >>> the offset. Some digital software has an allowance for an offset, but I'm >>> not sure about yours. You might check on this. >>> >>> Typically if operating on 20 meters with radio set to 14.070MHz, the >>> waterfall will be full of traces at audio frequencies spread across the >>> passband of your radio. So you actual transmission freq is the sum of VFO >>> plus the audio. >>> >>> ...bill nr4c >>> >>> -----Original Message----- >>> From: Matt Zilmer [mailto:[hidden email]] >>> Sent: Sunday, January 01, 2012 11:31 AM >>> To: [hidden email] >>> Subject: [Elecraft] K3: data modes - bizarre behavior >>> >>> In all this time with K3 #24, I've never been stymied by any issue >>> such as described below. >>> >>> I'm a Navy-Marine Corps MARS member. We use RMS Express in the WL2K >>> system on HF, running WL2K Winmor mode The software I have is version >>> 1.1.3.0. >>> >>> I also use LP Bridge to create two COM ports: one used for DTR (PTT) >>> and the other for control, COM19 and COM20 respectively. The sound >>> card is an EMU 0202. >>> >>> The problem is this: When RMS Express takes control of the K3, >>> calling an RMS node on HF *always* results in the receive frequency >>> being 1.5 KHz too high. I've had to rotate the RIT between call-up >>> transmissions to get the RX on frequency before the initial 5 attempts >>> time out. The TX frequency seems dead-on, because the RMS always >>> answers - but RX is 1.5 KHz high. And yes, I've tested with multiple >>> RMS nodes, including my own NMCM RMS here at the shack. Same problem >>> occurs with each, so it's a setup issue with software or the K3 here. >>> >>> RMS Express sends the following commands after it's set the COM20 comm >>> parameters: >>> >>> FR0; # cancel split >>> RT0; # RIT OFF >>> XT0; # XIT OFF >>> MD6; # TX DATA mode >>> DT0; # DATA A sub-mode of TX DATA >>> >>> The sequence above is sent once at the beginning of an RMS Express >>> call-up of the remote node. Only COM19's DTR is used to assert PTT >>> for transmissions. >>> >>> Just for grins, I checked the various meta-modes the K3 is in. I >>> discovered that even though AI is set to ZERO, I'm still getting IF >>> annunciations back from the K3. Odd, that. >>> >>> K31; # K3 extended commands enabled >>> K22; # K2 extended " " >>> AI0; # AUTOINF OFF >>> >>> Since split and the incremental controls are off and ZEROed, I'm >>> totally blind to what's going on. VFO A is on the correct frequency >>> in each case (for each RMS Node), which means to me that RX and TX >>> actual frequencies should be the same. >>> >>> Any ideas what's causing this? >>> >>> 73 and HNY, >>> matt W6NIA, NNN0UET >>> >>> >>> ______________________________________________________________ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:[hidden email] >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> > > > ------------------------------ > > Message: 23 > Date: Sun, 1 Jan 2012 11:53:26 -0800 > From: Bill Harris <[hidden email]> > Subject: Re: [Elecraft] K3: data modes - bizarre behavior > To: <[hidden email]>, <[hidden email]> > Cc: [hidden email] > Message-ID: <[hidden email]> > Content-Type: text/plain; charset="iso-8859-1" > > > I think you nailed it Don! My list of Government frequencies showes both the dial frequency and the center, which is off set by 1500 Hz. > Carry-on > Bill-w7kxb > >> Date: Sun, 1 Jan 2012 14:48:58 -0500 >> From: [hidden email] >> To: [hidden email] >> CC: [hidden email] >> Subject: Re: [Elecraft] K3: data modes - bizarre behavior >> >> Matt, >> > >> It sounds like your software is trying to set the K3 to the channel >> center frequency. Just as a guess, that might be SOP for government >> gear, but not for most ham rigs which refer to the suppressed carrier >> frequency.. >> >> 73, >> Don W3FPR > > > > ------------------------------ > > Message: 24 > Date: Sun, 1 Jan 2012 19:54:25 +0000 > From: Stephen Prior <[hidden email]> > Subject: Re: [Elecraft] K3: data modes - bizarre behavior > To: [hidden email], [hidden email] > Message-ID: > <CA+vZ_+L9f6gpCF4tgKXv7xMwEGa9BAVZLkWhpdU13UkNGD0=[hidden email]> > Content-Type: text/plain; charset=ISO-8859-1 > > What Don is saying is certainly true for the UK military HF gear I have > used. Centre of channel is always 1500Hz higher than the suppressed > carrier frequency. > > 73 Stephen G4SJP > > On 1 January 2012 19:48, Don Wilhelm <[hidden email]> wrote: > >> <snip> >> It sounds like your software is trying to set the K3 to the channel >> center frequency. Just as a guess, that might be SOP for government >> gear, but not for most ham rigs which refer to the suppressed carrier >> frequency.. >> >> 73, >> Don W3FPR >> >> > > > ------------------------------ > > Message: 25 > Date: Sun, 1 Jan 2012 19:56:34 +0000 > From: "Matthew Pitts" <[hidden email]> > Subject: [Elecraft] Fw: K3: data modes - bizarre behavior > To: "Elecraft" <[hidden email]> > Message-ID: > <[hidden email]> > > Content-Type: text/plain > > > Sent from my Wireless Device > > -----Original Message----- > From: "Matthew Pitts" <[hidden email]> > Date: Sun, 1 Jan 2012 19:56:07 > To: <[hidden email]> > Reply-To: [hidden email] > Subject: Re: [Elecraft] K3: data modes - bizarre behavior > > Don, > > RMS Express is actually a Ham program. > > Matt, > > I suggest bring this issue to the attention of the Winlink Development Team; they may not be able to get a fix for you right away, but I'm sure they would like to know about it. > > Matthew Pitts > N8OHU > > Sent from my Wireless Device > > > > ------------------------------ > > Message: 26 > Date: Sun, 1 Jan 2012 12:04:25 -0800 > From: Wayne Burdick <[hidden email]> > Subject: Re: [Elecraft] K3 Wish List - XIT tell-tale > To: Tom Boucher <[hidden email]> > Cc: Reflector Posting Elecraft <[hidden email]> > Message-ID: <[hidden email]> > Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes > > Hi Tom, > > There are LCD icons for both RIT and XIT. XIT is rarely used, and > you'd think that those who do use it would be motivated to keep an eye > on both the XIT icon and the Delta-F LED. That said, I'll add to my > list consideration of flashing the XIT icon and/or the Delta-F LED. I > have to be careful with such changes because of unintended side > effects and the annoyance factor. It would certainly need a menu entry > for disabling this behavior. > > 73, > Wayne > N6KR > > > On Jan 1, 2012, at 11:07 AM, Tom Boucher wrote: > >> I guess Elecraft are now beyond wanting to make relatively minor >> changes to the K3 as it is now a mature product, but how about this? >> On two occasions recently I have been in QSO with a weak distant >> station on 160 or 80 and a very loud EU has come up on the same >> frequency with a QRL? On my reply of 'R Pse QSY' the other station >> ignores me and begins a long and loud CQ thus wiping out the one I'm >> trying to work. Both times I established that the interfering >> station was using a K3 and had inadvertently left the 'XIT' function >> on, thus transmitting on a different frequency to that he was >> listening on. >> >> The yellow 'delta f' tell-tale LED is there to tell you that either >> the RIT or XIT function is on, but if you are already using the RIT >> function, there is nothing to tell you that XIT is also on. Would it >> be a simple firmware mod to make the lamp flash on and off when XIT >> is active? >> >> 73 >> Tom G3OLB >> ______________ > > > ------------------------------ > > Message: 27 > Date: Sun, 01 Jan 2012 15:26:05 -0500 > From: Mike Markowski <[hidden email]> > Subject: [Elecraft] P3 auto REF LVL adjust? > To: [hidden email] > Message-ID: <[hidden email]> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Since the PA temp is available as well as the filter bandwidth in use, I > wonder if the P3 could have an auto-adjust of REF LVL? It would only > work within a given band and only after the op has adjusted the REF LVL > to begin with. But after that it seems that the good ol' N = kTB would > be a simple enough calc that P3 REF LVL could be auto-adjusted as SPAN > or filter bw is changed. > > I know, talk about being lazy... :-) Happy 2012! > > Mike ab3ap > > > ------------------------------ > > Message: 28 > Date: Sun, 1 Jan 2012 12:37:45 -0800 > From: Bob K6UJ <[hidden email]> > Subject: Re: [Elecraft] Single Band 40 Meter Dipole > To: Elecraft List <[hidden email]> > Message-ID: <[hidden email]> > Content-Type: text/plain; charset=us-ascii > > Phil, > > LADDERLINE VS COAX > I would use coax feed and a 1:1 balun right where the coax connects to the dipole. > I have used window line and 450 ohm home made ladder line on various antennas over the years and grew tired of working on > feedline issues. "Theoretically" with balanced feedline there will be no radiation from the feedline but the surroundings affect the balance > from the antenna down to the shack. I have used a 1:1 balun as you mentioned at the end of the ladder line and then into the shack with > coax and could solve the RF in the shack issue but the toughest issue to solve was the feedline reradiating electrical noise. The "not so balanced" > feedline attracts noise like a big magnet and reradiates it. Not so good when you are trying to copy weak DX and you have an additional s unit or so of electrical noise. > By experimenting with additional RF choking and grounding as learned from Jim K9YC in his excellent > webpage I could eventually reduce the reradiated noise down to a very low level, however not as low as coax feed with a 1:1 balun at the antenna. > Each new ladder line fed antenna required different RF choking measures. Its not just a hobby, its an adventure, hihihi. > > FAN DIPOLE OR SINGLES > I have had very good results with a fan dipole for 80 and 40. The trick is to have enough spacing between the legs of the dipole. My last configuration > had 3 feet separation between the end of the 40 meter dipole and the 80 meter dipole. Much better than lossy traps ! I have tried fan dipoles with > other bands in addition to 80 and 40 and never could get tuned right, one band affects the others, etc. > > LOOP ANTENNA ? > I am a big fan of the delta loop antenna. A full size delta for 80 can be used on all bands (80 thru 10) very well with an antenna tuner and depending on the feed point can provide either horizontal or vertical polarization. It needs only a single center support of 50 feet or so and about 100 feet end to end. The lower leg can be zig-zagged to reduce the lower leg dimension without affecting the performance. It is basically a triangle with the apex at the top. It can be "flattened" so the bottom horizontal leg is longer than the other two legs without impairing the effectiveness, actually a flattened delta provides almost a perfect 50 ohm match. It also can be sloped, doesn't have to be strung exactly vertical. The horizontal wire across the bottom can be very low, mine is 6 feet high across the top of a wood fence on the side of my property. A delta gives a nice low radiation angle for DX and has gain over a dipole. It can be fed with either ladder line or coax, > ess which one I use ? ( hihi. ) With an antenna tuner an 80 meter delta will cover all bands and will out perform dipoles, particularly on 80 and 40 meters where you would have to have 100 feet or higher dipoles to give a low radiation angle. Comparing the delta to individual dipoles I have found it to be a quieter receive antenna and on 40 and 80 just outstanding, I can copy DX signals on the delta which can not even be heard on the dipole. On the higher bands, above 80/40, unless you have a 70 foot or so tower, the delta will outperform the dipoles. With just a single center support if you have the room for the lower leg it is a great all band consideration. > > > REFERENCES > I highly recommend these two sources for antenna design and RFI / matching information. > (My ON4UN book is very dog eared. It is my bible on antennas. Read the chapter on loop antennas and you will never be the same. hihi. ) > > 1. Low Band DXing by ON4UN > > 2. A Ham's Guide to RFI, Ferrites, Baluns, and Audio Interfacing by Jim Brown > available on his webpage http://audiosystemsgroup.com/RFI-Ham.pdf > > > 73, > Bob > K6UJ > > > > > > > > > > On Dec 31, 2011, at 9:14 PM, Phil Hystad wrote: > >> OK, lots of discussion on open wire feeders and other ideas so I thought I would throw out a question to soak up some of the Elecraft community knowledge and wisdom. >> >> Given a 40-meter dipole antenna, up about 50 feet, what is the best feed configuration for single band usage to minimize loss and minimize common mode currents and radiation from the feed line? >> >> I am thinking of building such an antenna and I would have no plans for using it on any other band but I would like to use it on the full spectrum of 40 meters with primary focus on the low end for CW. >> >> My current idea is to cut the antenna for 7.1 MHz but I am not sure about the best plan to feed it. I am thinking of 450 ohm window line (aka ladder line) to a 1:1 balun and the coax the rest of the way into the shack. Or, how about 300 ohm twin lead into a 6:1 balun with coax the rest of the way into the shack? Would this be a significant difference? Or, some other combination? >> >> Or, maybe a 1:1 balun right at the antenna feed point with coax the remaining distance to the shack? >> >> Any comments or suggestions? >> >> I am thinking of also raising up two other dipoles. I have room to put up 80, 40, and 30 as separate dipole antennas -- it is actually a little bit more awkward to do a fan dipole so I am leaning on not doing that. >> >> 73, phil, K7PEH >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > > > > ------------------------------ > > Message: 29 > Date: Sun, 01 Jan 2012 14:40:55 -0600 > From: Randy Farmer <[hidden email]> > Subject: Re: [Elecraft] K3/P3 DOA > To: [hidden email] > Message-ID: <[hidden email]> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > My P3 worked well for less than 24 hours after assembly and then > developed the same symptoms. It turned out to be a failure of the MMIC > amplifier device on the RF/Splitter board. I did a board exchange and > it's been running fine for several months. Perhaps there was a bad run > of these devices, as I believe I've seen a couple of others mention a > similar problem. Elecraft support will certainly make sure he gets the > P3 up and running ASAP. > > 73... > Randy, W8FN > >> My good friend and elmer Mark (n1lo) recently purchased a pre-loved K3 and >> treated himself to a P3-K for Christmas. I visited him yesterday, and >> watched as he assembled his new 'toy'. All went pretty well, until we >> hooked it up. It all seems to work, except, there is no signal showing on >> the P3 screen. All the markings are there, display seems to be working, but >> no signal. Adjusting the "REF LVL" brings up 'noise' but removing the BNC >> cable does not change the display. > > > ------------------------------ > > Message: 30 > Date: Sun, 1 Jan 2012 15:46:19 -0500 > From: "Paul W. Van Dyke" <[hidden email]> > Subject: [Elecraft] K2 Mic question > To: <[hidden email]> > Message-ID: <001601ccc8c6$6cb17230$46145690$@kconline.com> > Content-Type: text/plain; charset="us-ascii" > > I am adapting a Yamaha CM500 to the K2. I need the 5+ volts on pin 6 and > normally would jumper the two as then I BELIEVE I could use the MH2 and Heil > adapters ( it is now setup as well as K3 as a Kenwood), BUT I am NOT sure > if I will blow something. > Suggestions?? > > Thank You > Paul - KB9AVO > > > > ------------------------------ > > Message: 31 > Date: Sun, 01 Jan 2012 15:47:51 -0500 > From: "Joe Subich, W4TV" <[hidden email]> > Subject: Re: [Elecraft] K3: data modes - bizarre behavior > To: [hidden email], Elecraft Reflector <[hidden email]> > Message-ID: <[hidden email]> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > > Matt, > >> I verified that the software is setting the correct carrier freq, >> based on the center freq cited by the MARS frequency matrix. I was >> thinking along the same lines as your suggestion below. > > Standard practice in government operation - including MARS in recent > years - is to specify the "center of channel" and *not* the USB dial > frequency. The two frequencies will differ by 1400 to 1500 Hz based > on the particular assumptions used for the transmitter with 1500 Hz > being slightly more common. > > I suspect you will find your MARS matrix specifies "center of channel" > for all digital and any remaining CW networks while still giving USB > suppressed carrier frequency for voice networks. > > 73, > > ... Joe, W4TV > > > On 1/1/2012 2:25 PM, Matt Zilmer wrote: >> Thanks for your reply, Bill. >> >> I verified that the software is setting the correct carrier freq, >> based on the center freq cited by the MARS frequency matrix. I was >> thinking along the same lines as your suggestion below. >> >> If I use program control to set the freq, then I get TX + 1.5 KHz = >> RX. This is with split disabled and RIT / XIT turned off. >> >> Temporarily, I'm manually setting the carrier freq to 1.5 KHz below >> center instead of relying on the control program to do this. That >> solved the problem, but doesn't explain why the radio has carrier freq >> centered on the freq only under program control. >> >> Mysteries.... >> >> 73, >> matt W6NIA / NNN0UET >> >> >> >> On Sun, 01 Jan 2012 13:21:51 -0500, you wrote: >> >>> Well, this is normal for digital mode DATA A. I'm not familiar with your >>> particular software, but for PSK31 and similar modes, the K3 VFO A is set to >>> a frequency for the carrier. The audio is on the upper sideband, and is >>> centered in the 3 KHz passband which is 1.5kHz up from the carrier. Thus >>> the offset. Some digital software has an allowance for an offset, but I'm >>> not sure about yours. You might check on this. >>> >>> Typically if operating on 20 meters with radio set to 14.070MHz, the >>> waterfall will be full of traces at audio frequencies spread across the >>> passband of your radio. So you actual transmission freq is the sum of VFO >>> plus the audio. >>> >>> ...bill nr4c >>> >>> -----Original Message----- >>> From: Matt Zilmer [mailto:[hidden email]] >>> Sent: Sunday, January 01, 2012 11:31 AM >>> To: [hidden email] >>> Subject: [Elecraft] K3: data modes - bizarre behavior >>> >>> In all this time with K3 #24, I've never been stymied by any issue >>> such as described below. >>> >>> I'm a Navy-Marine Corps MARS member. We use RMS Express in the WL2K >>> system on HF, running WL2K Winmor mode The software I have is version >>> 1.1.3.0. >>> >>> I also use LP Bridge to create two COM ports: one used for DTR (PTT) >>> and the other for control, COM19 and COM20 respectively. The sound >>> card is an EMU 0202. >>> >>> The problem is this: When RMS Express takes control of the K3, >>> calling an RMS node on HF *always* results in the receive frequency >>> being 1.5 KHz too high. I've had to rotate the RIT between call-up >>> transmissions to get the RX on frequency before the initial 5 attempts >>> time out. The TX frequency seems dead-on, because the RMS always >>> answers - but RX is 1.5 KHz high. And yes, I've tested with multiple >>> RMS nodes, including my own NMCM RMS here at the shack. Same problem >>> occurs with each, so it's a setup issue with software or the K3 here. >>> >>> RMS Express sends the following commands after it's set the COM20 comm >>> parameters: >>> >>> FR0; # cancel split >>> RT0; # RIT OFF >>> XT0; # XIT OFF >>> MD6; # TX DATA mode >>> DT0; # DATA A sub-mode of TX DATA >>> >>> The sequence above is sent once at the beginning of an RMS Express >>> call-up of the remote node. Only COM19's DTR is used to assert PTT >>> for transmissions. >>> >>> Just for grins, I checked the various meta-modes the K3 is in. I >>> discovered that even though AI is set to ZERO, I'm still getting IF >>> annunciations back from the K3. Odd, that. >>> >>> K31; # K3 extended commands enabled >>> K22; # K2 extended " " >>> AI0; # AUTOINF OFF >>> >>> Since split and the incremental controls are off and ZEROed, I'm >>> totally blind to what's going on. VFO A is on the correct frequency >>> in each case (for each RMS Node), which means to me that RX and TX >>> actual frequencies should be the same. >>> >>> Any ideas what's causing this? >>> >>> 73 and HNY, >>> matt W6NIA, NNN0UET >>> >>> >>> ______________________________________________________________ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:[hidden email] >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> > > > ------------------------------ > > Message: 32 > Date: Sun, 1 Jan 2012 16:01:49 -0500 > From: W4GRJ <[hidden email]> > Subject: Re: [Elecraft] K3: data modes - bizarre behavior > To: "[hidden email]" <[hidden email]> > Cc: "[hidden email]" <[hidden email]> > Message-ID: <[hidden email]> > Content-Type: text/plain; charset=us-ascii > > Matt, > > Just leave the K3 in USB, do not change to data mode. RMS Express will set to the correct freq. You will not have to make any adjustments. > > Jack > W4GRJ / AFA4DG > > > On Jan 1, 2012, at 11:30, Matt Zilmer <[hidden email]> wrote: > >> In all this time with K3 #24, I've never been stymied by any issue >> such as described below. >> >> I'm a Navy-Marine Corps MARS member. We use RMS Express in the WL2K >> system on HF, running WL2K Winmor mode The software I have is version >> 1.1.3.0. >> >> I also use LP Bridge to create two COM ports: one used for DTR (PTT) >> and the other for control, COM19 and COM20 respectively. The sound >> card is an EMU 0202. >> >> The problem is this: When RMS Express takes control of the K3, >> calling an RMS node on HF *always* results in the receive frequency >> being 1.5 KHz too high. I've had to rotate the RIT between call-up >> transmissions to get the RX on frequency before the initial 5 attempts >> time out. The TX frequency seems dead-on, because the RMS always >> answers - but RX is 1.5 KHz high. And yes, I've tested with multiple >> RMS nodes, including my own NMCM RMS here at the shack. Same problem >> occurs with each, so it's a setup issue with software or the K3 here. >> >> RMS Express sends the following commands after it's set the COM20 comm >> parameters: >> >> FR0; # cancel split >> RT0; # RIT OFF >> XT0; # XIT OFF >> MD6; # TX DATA mode >> DT0; # DATA A sub-mode of TX DATA >> >> The sequence above is sent once at the beginning of an RMS Express >> call-up of the remote node. Only COM19's DTR is used to assert PTT >> for transmissions. >> >> Just for grins, I checked the various meta-modes the K3 is in. I >> discovered that even though AI is set to ZERO, I'm still getting IF >> annunciations back from the K3. Odd, that. >> >> K31; # K3 extended commands enabled >> K22; # K2 extended " " >> AI0; # AUTOINF OFF >> >> Since split and the incremental controls are off and ZEROed, I'm >> totally blind to what's going on. VFO A is on the correct frequency >> in each case (for each RMS Node), which means to me that RX and TX >> actual frequencies should be the same. >> >> Any ideas what's causing this? >> >> 73 and HNY, >> matt W6NIA, NNN0UET >> >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> > > > ------------------------------ > > Message: 33 > Date: Sun, 1 Jan 2012 16:00:17 -0500 > From: <[hidden email]> > Subject: [Elecraft] How Long will it take to assemble a K3/100?? > To: [hidden email] > Message-ID: <20120101210018.JBK8S.102372.root@cdptpa-web12-z02> > Content-Type: text/plain; charset=utf-8 > > Greetings everyone. I ordered a K3/100 in kit form last week. I should have it this week. Just wondering how long it should take to assemble it?? Guess this is very different from my Heathkit days.. > > Thanks in advance and a very Happy & Healthy New year to all on the list.. > > 73 Steve/k2we Saratoga Springs, NY > > > ------------------------------ > > Message: 34 > Date: Sun, 1 Jan 2012 13:04:50 -0800 > From: Phil Hystad <[hidden email]> > Subject: Re: [Elecraft] How Long will it take to assemble a K3/100?? > To: [hidden email] > Cc: [hidden email] > Message-ID: <[hidden email]> > Content-Type: text/plain; charset=us-ascii > > It took me 8 hours and I did not rush. I think the average is about 8 hours. > > I found it fairly easy although I forgot to put in one screw and had to take the front panel board thing off and do it again. But, that only cost me about 15 minutes. > > 73, phil, K7PEH > K3 Serial #3799 > > > On Jan 1, 2012, at 1:00 PM, [hidden email] wrote: > >> Greetings everyone. I ordered a K3/100 in kit form last week. I should have it this week. Just wondering how long it should take to assemble it?? Guess this is very different from my Heathkit days.. >> >> Thanks in advance and a very Happy & Healthy New year to all on the list.. >> >> 73 Steve/k2we Saratoga Springs, NY >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > > > > ------------------------------ > > Message: 35 > Date: Sun, 01 Jan 2012 16:06:14 -0500 > From: Don Wilhelm <[hidden email]> > Subject: Re: [Elecraft] K2 Mic question > To: "Paul W. Van Dyke" <[hidden email]> > Cc: [hidden email] > Message-ID: <[hidden email]> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Paul, > > Do 2 things. > Yes, connect straight across the microphone configuration header to > connect +5V to pin 6, and then solder a 5.6 k resistor between pins 1 > and 6 of the mic jack. > > Second thing is just a check of the Heil Kenwood adapter - use your > ohmmeter, connect one lead to pin 6 and check the resistance to all > places you can plug something into - expect a very high resistance - > maybe infinite (same reading as with the leads separated). > > This last step is just a check. Bob Heil has told me that only 4 > conductors are connected in his adapters, AF, AF Return, PTT, and PTT > Return, but if someone else had it, there could be modifications. > > 73, > Don W3FPR > > On 1/1/2012 3:46 PM, Paul W. Van Dyke wrote: >> I am adapting a Yamaha CM500 to the K2. I need the 5+ volts on pin 6 and >> normally would jumper the two as then I BELIEVE I could use the MH2 and Heil >> adapters ( it is now setup as well as K3 as a Kenwood), BUT I am NOT sure >> if I will blow something. >> Suggestions?? >> >> Thank You >> Paul - KB9AVO >> > > > ------------------------------ > > Message: 36 > Date: Sun, 01 Jan 2012 16:10:33 -0500 > From: Bruce W1UJR <[hidden email]> > Subject: [Elecraft] Problem - Elecraft K1 Low Power On 15 Meters > To: Elecraft Reflector <[hidden email]> > Message-ID: <[hidden email]> > Content-Type: text/plain; CHARSET=US-ASCII > > Hello all, > > Just finished up the KFL1-2 band board for my K1, selected bands 80 and 15 meters. > > Base Line Info: > TX - Elecraft K1 serial 3052 > Ant Tuner - No installed > Power supply - 13vdc > Dummy Load - Elecraft DL-1 - all measurements taken with this as load > Power Meter - Oak Hills Research (OHR) LM-2 0-10 watt reading unit > > Problem > New KF1-2 board build, for 80 and 15 meters. > 80 meters power output is fine, in fact it reads nearly 9 watts on the OHR LM-2 power meter. > 15 meters is a different story, the most I can get it out of it is just over 1 watt, running off a 13vdc power supply. > > Testing Done > I have another K1 unit here, switched the board into that, was able to get the 9 watts on 80 meters, and a solid 4 watts on 15 meters. > The only difference I can see between these two sets is that the K1 which has low output on 15 meters has the modification of a > capacitor for use on 80 meters - this is a Elecraft mod. > I checked and double checked coil winding counts and component values on the KFL1-2 board, all appear good. > > Summary and Question > Since it does not bother in the other K1, have to assume it's something with my K1. > Suggestions on where to start? > > Thanks! > > > Cordially, > Bruce J. Howes W1UJR > www.W1UJR.net > > > > > ------------------------------ > > Message: 37 > Date: Sun, 01 Jan 2012 13:18:23 -0800 > From: Matt Zilmer <[hidden email]> > Subject: Re: [Elecraft] K3: data modes - bizarre behavior > To: [hidden email] > Cc: [hidden email] > Message-ID: <[hidden email]> > Content-Type: text/plain; charset=us-ascii > > Hi Don, > > I've captured the commands sent to the K3 prior to TX on the assigned > frequency: > > FA0000FFFFfff; # FFFFfff is the correct carrier frequency. > FR0; > RT0; > XT0; > MD; > DT0; > > I'm still mystified, since the FA command is setting the correct cxr > frequency. > > It is also true that RMS Express uses frequencies with the center > frequency shown, however it compensates by subtracing off half the > channel width to set the carrier freq. > > Thanks and 73, > matt W6NIA > > On Sun, 01 Jan 2012 14:48:58 -0500, you wrote: > >> Matt, >> >> I too believe your software does not compensate for how the K3 handles >> (and displays) the frequency when in DATA A mode. The K3 indicates the >> suppressed carrier frequency rather than the Passband center frequency. >> >> It sounds like your software is trying to set the K3 to the channel >> center frequency. Just as a guess, that might be SOP for government >> gear, but not for most ham rigs which refer to the suppressed carrier >> frequency.. >> >> 73, >> Don W3FPR >> >> On 1/1/2012 2:25 PM, Matt Zilmer wrote: >>> Thanks for your reply, Bill. >>> >>> I verified that the software is setting the correct carrier freq, >>> based on the center freq cited by the MARS frequency matrix. I was >>> thinking along the same lines as your suggestion below. >>> >>> If I use program control to set the freq, then I get TX + 1.5 KHz = >>> RX. This is with split disabled and RIT / XIT turned off. >>> >>> Temporarily, I'm manually setting the carrier freq to 1.5 KHz below >>> center instead of relying on the control program to do this. That >>> solved the problem, but doesn't explain why the radio has carrier freq >>> centered on the freq only under program control. >>> >>> Mysteries.... >>> >>> 73, >>> matt W6NIA / NNN0UET >>> >>> >>> >>> On Sun, 01 Jan 2012 13:21:51 -0500, you wrote: >>> >>>> Well, this is normal for digital mode DATA A. I'm not familiar with your >>>> particular software, but for PSK31 and similar modes, the K3 VFO A is set to >>>> a frequency for the carrier. The audio is on the upper sideband, and is >>>> centered in the 3 KHz passband which is 1.5kHz up from the carrier. Thus >>>> the offset. Some digital software has an allowance for an offset, but I'm >>>> not sure about yours. You might check on this. >>>> >>>> Typically if operating on 20 meters with radio set to 14.070MHz, the >>>> waterfall will be full of traces at audio frequencies spread across the >>>> passband of your radio. So you actual transmission freq is the sum of VFO >>>> plus the audio. >>>> >>>> ...bill nr4c >>>> >>>> -----Original Message----- >>>> From: Matt Zilmer [mailto:[hidden email]] >>>> Sent: Sunday, January 01, 2012 11:31 AM >>>> To: [hidden email] >>>> Subject: [Elecraft] K3: data modes - bizarre behavior >>>> >>>> In all this time with K3 #24, I've never been stymied by any issue >>>> such as described below. >>>> >>>> I'm a Navy-Marine Corps MARS member. We use RMS Express in the WL2K >>>> system on HF, running WL2K Winmor mode The software I have is version >>>> 1.1.3.0. >>>> >>>> I also use LP Bridge to create two COM ports: one used for DTR (PTT) >>>> and the other for control, COM19 and COM20 respectively. The sound >>>> card is an EMU 0202. >>>> >>>> The problem is this: When RMS Express takes control of the K3, >>>> calling an RMS node on HF *always* results in the receive frequency >>>> being 1.5 KHz too high. I've had to rotate the RIT between call-up >>>> transmissions to get the RX on frequency before the initial 5 attempts >>>> time out. The TX frequency seems dead-on, because the RMS always >>>> answers - but RX is 1.5 KHz high. And yes, I've tested with multiple >>>> RMS nodes, including my own NMCM RMS here at the shack. Same problem >>>> occurs with each, so it's a setup issue with software or the K3 here. >>>> >>>> RMS Express sends the following commands after it's set the COM20 comm >>>> parameters: >>>> >>>> FR0; # cancel split >>>> RT0; # RIT OFF >>>> XT0; # XIT OFF >>>> MD6; # TX DATA mode >>>> DT0; # DATA A sub-mode of TX DATA >>>> >>>> The sequence above is sent once at the beginning of an RMS Express >>>> call-up of the remote node. Only COM19's DTR is used to assert PTT >>>> for transmissions. >>>> >>>> Just for grins, I checked the various meta-modes the K3 is in. I >>>> discovered that even though AI is set to ZERO, I'm still getting IF >>>> annunciations back from the K3. Odd, that. >>>> >>>> K31; # K3 extended commands enabled >>>> K22; # K2 extended " " >>>> AI0; # AUTOINF OFF >>>> >>>> Since split and the incremental controls are off and ZEROed, I'm >>>> totally blind to what's going on. VFO A is on the correct frequency >>>> in each case (for each RMS Node), which means to me that RX and TX >>>> actual frequencies should be the same. >>>> >>>> Any ideas what's causing this? >>>> >>>> 73 and HNY, >>>> matt W6NIA, NNN0UET >>>> >>>> >>>> ______________________________________________________________ >>>> Elecraft mailing list >>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>>> Help: http://mailman.qth.net/mmfaq.htm >>>> Post: mailto:[hidden email] >>>> >>>> This list hosted by: http://www.qsl.net >>>> Please help support this email list: http://www.qsl.net/donate.html >>> ______________________________________________________________ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:[hidden email] >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >>> > > > ------------------------------ > > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > http://mailman.qth.net/mailman/listinfo/elecraft > You must be a subscriber to post. > Elecraft web page: http://www.elecraft.com > > End of Elecraft Digest, Vol 93, Issue 2 > *************************************** > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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