The K2 and RTTY
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Well, I am getting back into RTTY and PSK31 after a couple of years away from the modes. I have my IC756PROII set up for AFSK and going to FSK using MMTTY on RTTY (only) What I "hate" about the PROII is when you are using RTTY I have to use AFSK Keying and the receiver's bandpass is less that ideal. This is why I am going to FSK so I can used the great filters on the PROII. Well, I never thought about using the K2/100 as an RTTY rig. I know it has RTTY filters...but I am sure it does not use FSK, but uses AFSK through the RTTY Filters? Right? Could somebody who has used the K2 on RTTY and PSK31 eludicate me on their experience with the rig and the mode? Lee - K0WA In our day and age it seems that Common Sense is in short supply. If you don't have any Common Sense - get some Common Sense and use it. If you can't find any Common Sense, ask for help from somebody who has some Common Sense. Is Common Sense devine? _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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Hi Lee,
Not too much experience with RTTY yet, but the K2 filters seem to be very good. I have pictures atL http://www.pituch.net/personal/Steve's%20Page/Radio/RTTY/RTTY.html Or go to http://www.pituch.net/personal/ and drill down through the menus. I used MixW to align the filters. Steve, W2MY -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.432 / Virus Database: 268.15.26/594 - Release Date: 12/20/2006 3:54 PM _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by k0wa@swbell.net
I have had excellent success with the K2/100 and RTTY. Worked several
contests with it. Elecraft does not recommend running at full power, but under contest conditions, the exchanges are so short you can get away with it, most of the time. I have had some problems with RF getting onto the K2 data bus, but reducing power solves the problem. I do not have all of the K2/100 shielding upgrades installed, yet. As always, "your mileage may vary." Logan KZ6O, # 1609 Lee Buller wrote: > > > Well, I am getting back into RTTY and PSK31 after a couple of years away from the modes. I have my IC756PROII set up for AFSK and going to FSK using MMTTY on RTTY (only) > > What I "hate" about the PROII is when you are using RTTY I have to use AFSK Keying and the receiver's bandpass is less that ideal. This is why I am going to FSK so I can used the great filters on the PROII. > > Well, I never thought about using the K2/100 as an RTTY rig. I know it has RTTY filters...but I am sure it does not use FSK, but uses AFSK through the RTTY Filters? Right? > > Could somebody who has used the K2 on RTTY and PSK31 eludicate me on their experience with the rig and the mode? > > Lee - K0WA > > > >In our day and age it seems that Common Sense is in short supply. If you don't have any Common Sense - get some Common Sense and use it. If you can't find any Common Sense, ask for help from somebody who has some Common Sense. Is Common Sense devine? >_______________________________________________ >Elecraft mailing list >Post to: [hidden email] >You must be a subscriber to post to the list. >Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > >Help: http://mailman.qth.net/subscribers.htm >Elecraft web page: http://www.elecraft.com > > > > _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by k0wa@swbell.net
Lee,
The K2 does not do FSK. It would take some major mods to make that happpen. The RTTY mode could likely be better labeled 'DATA' or 'DIGI' because to is well suited to use with the soundcard digital modes. Unlike your PROII, the K2 offers more control over the filters by offering a separate set of filters for RTTY mode. 73, Don W3FPR > -----Original Message----- > Well, I am getting back into RTTY and PSK31 after a couple of > years away from the modes. I have my IC756PROII set up for AFSK > and going to FSK using MMTTY on RTTY (only) > > What I "hate" about the PROII is when you are using RTTY I have > to use AFSK Keying and the receiver's bandpass is less that > ideal. This is why I am going to FSK so I can used the great > filters on the PROII. > > Well, I never thought about using the K2/100 as an RTTY rig. I > know it has RTTY filters...but I am sure it does not use FSK, but > uses AFSK through the RTTY Filters? Right? > > Could somebody who has used the K2 on RTTY and PSK31 eludicate > me on their experience with the rig and the mode? > > Lee - K0WA > No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.432 / Virus Database: 268.15.26/594 - Release Date: 12/20/2006 3:54 PM _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by Logan Zintsmaster
I have made several thousand RTTY Contest QSOs using the K2/100. It is
AFSK only. My TX power out is about 90 watts usually into a low Diamond verticle antenna rated for 200 watts. Receive works OK for me considering the limitations of the antenna. Transmit works well for me on search and pounce. I leave the fan speed set high during contests. The limitation of my antenna have kept my rate at 100 - 200 QSOs per contest. If I had better antennas, a higher S&P QSO rate might result in over heating. I have tried running mode but find that the rig starts to get unacceptably hot after several minutes of CQing. During very good band conditions, my hourly S&P rate was high enough to damage the 40M and 20M matching components in the Diamond antenna. I now must restrict the Diamond antenna to 80M and 15M use and use a low Alpha Delta DX-CC fan dipole for 40M and 20M. I set the K2 AGC off and control RX signal strength into the computer sound card using RF gain. AGC off prevents pumping that can depress weak signals when a strong signal comes onto the passband. Under crowded conditions, I use AFil to narrow bandwidth with 1000 Hz being used as my center frequency. RTTY AFil is set to opt1 with the strong right third of the filter passband aligned with 1000 HZ. I always try to TX at 1000 HZ to keep the TX signal strength consistent. I use narrowed CW filters centered on 1000 Hz when needed. Reducing RF gain is more beneficial for copying weak signals that using narrow DSP filters. Problems copying weak signals appear to be more related to the background noise level than adjacent signal interference. The narrow DSP filters work FB to eliminate unwanted signals within a wider passband with the AGC off to prevent signal strength depression by the AGC. I avoid XFil because I find the small frequency shift annoying on digital modes when switching between the XFil used on RX and the Opt1 fil always used on TX. I hope to make the following future changes: -higher and better antennas to improve my QSO rate, -an external amplifier so that I can use lower power on the K2/100 to enable run mode without significant heating, -an external muffin fan to improve K2 cooling efficiency. I have never had a heating problem using typically lower power PSK31. AGC pumping can be challenging on PSK 31 because of the narrow signal and closeness of adjacent signals. HTH 73 de KB1IKD Lee Buller wrote: > > > Well, I am getting back into RTTY and PSK31 after a couple of years away from the modes. I have my IC756PROII set up for AFSK and going to FSK using MMTTY on RTTY (only) > > What I "hate" about the PROII is when you are using RTTY I have to use AFSK Keying and the receiver's bandpass is less that ideal. This is why I am going to FSK so I can used the great filters on the PROII. > > Well, I never thought about using the K2/100 as an RTTY rig. I know it has RTTY filters...but I am sure it does not use FSK, but uses AFSK through the RTTY Filters? Right? > > Could somebody who has used the K2 on RTTY and PSK31 eludicate me on their experience with the rig and the mode? > > Lee - K0WA > > > >In our day and age it seems that Common Sense is in short supply. If you don't have any Common Sense - get some Common Sense and use it. If you can't find any Common Sense, ask for help from somebody who has some Common Sense. Is Common Sense devine? >_______________________________________________ >Elecraft mailing list >Post to: [hidden email] >You must be a subscriber to post to the list. >Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > >Help: http://mailman.qth.net/subscribers.htm >Elecraft web page: http://www.elecraft.com > > > > _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ________________________________________________________________________ Check out the new AOL. Most comprehensive set of free safety and security tools, free access to millions of high-quality videos from across the web, free AOL Mail and more. _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by k0wa@swbell.net
K0WA asked:
> Could somebody who has used the K2 on RTTY and PSK31 eludicate me > on their experience with the rig and the mode? Compared to the other two rigs I use for RTTY operating (mostly contests): 1. KPA gets warm pretty easily if you need more than 35 watts from it, especially if duty cycle goes up (say a string of unanswered CQs). Small fan is not enough, especially if room temp warm to begin with. Easy to deal with, but so important must be mentioned. 2. The difference between where you transmit & where you receive becomes a bit obvious when running on the K2 - I use the RIT on the other rigs for the occasional guy who comes back slightly off... on the K2 the RIT is used all the time as everybody is slightly off. Nature-of-beast issue, tends to get you when you forget & start calling others, who then do not hear you so well as now you're the one slightly off. 3. Unless you can change the mark/space tones for whatever does the RTTY stuff, you are not likely to be able to set the K2's filters for say four increasingly narrower BWs & be able to use those on all bands. About 1 kc (displayed) is the limit on my K2. 4. By far & away the reason to use a rig with FSK on RTTY (mentioned by K0WA, but snipped from above) is the ability (on all the rigs I have, at least) to use the rig's CW filters. The Big Three's OEM filters are probably a tad bit better than the K2's & if you have fitted after-market filters then this difference is even greater. Depending on how you operate, these points may or may not be a concern & might not even be noticed. None of my RTTY operation is "pedestrian" & I must admit item #4 is very, very obvious & more than just a bit annoying when combined with #3. 73, VR2BrettGraham _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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