K1...
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While waiting for the bugs to be worked out of the K3, I ordered
a K1 for 80 and 40 meters. The 80 meter parts are backordered for a week or so, but I have some questions about the rig. Is it not possable to get a 4 band one with 80,40,20,and 15 meters on it? If not, what is the reason? My main reason for getting the K1 is so I can use it in the den to rx some cw for practice, without running off to the ham shack and ignoring my wife. She can watch TV while I copy code with walkman style headphones. I read all the reviews, and they are very good. If I make the tuning range 100kc, will the tuning rate be too fast? The K1 seems very analog (with computer control), and I wonder if it works better in some respects then the K2? I would guess the K1 is free from the odd noise the K2 made at times when tuning, and frequency shifts between filter settings, and maybe the vfo is cleaner then DDS stuff? Brett N2DTS _______________________________________________ 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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Brett,
The K1 4 band board has only 2 low pass filters, so for possible band pair combinations, the higher band must be lower than the 2nd harmonic of the lower band. That fact rules out an 80/40 meter combination. 80/60 may be possible, but the K1 does not do SSB, so that is not a good choice. You are left with 40/30 for the lower band pair, and 20/(17 or 15) for the upper band pair. If you must have 80 meters with the 4 band board, that may be possible with a modified board, but it would then be a 3 band board - 80 and 40/30 would be possible or 80 and 20/(17 or 15) would be a possibility. The better solution is to purchase a 2 band board - if the 4 band board is for 40/30 and 20/15, then a 2 band board for 80 and 17 meters would allow coverage of all bands 80 thru 15. A properly operating K2 does not have the problems you suggest - the tuning 'pops' are the result of an open RFC15, and it covers all bands. The K2 receiver is more sensitive than the K1, so you may want to reconsider your choice. The K1 tuning range is builder selectable. Capacitors are provided for an 80+ kHz range or a 150+ kHz range - take your pick. the tuning range is covered by a 10 turn pot, so the 80 kHz range gives you about 8 kHz per turn while the 150 kHz range provides about 15 kHz per turn of bandspread. Some users say the 150 kHz range is too 'touchy', while others have no problem with it. Of course, you may use intermediate capacitor values to change the range to anything that you prefer. You mentioned computer control - the K2 can be computer controlled with the addition of the KIO2 option, but I do not know of any computer control possibilities for the K1. 73, Don W3FPR Brett Gazdzinski wrote: > While waiting for the bugs to be worked out of the K3, I ordered > a K1 for 80 and 40 meters. The 80 meter parts are backordered > for a week or so, but I have some questions about the rig. > > Is it not possable to get a 4 band one with 80,40,20,and 15 > meters on it? > If not, what is the reason? > > My main reason for getting the K1 is so I can use it in the den to rx > some cw for practice, without running off to the ham > shack and ignoring my wife. > She can watch TV while I copy code with walkman > style headphones. > > I read all the reviews, and they are very good. > If I make the tuning range 100kc, will the tuning rate > be too fast? > The K1 seems very analog (with computer control), and > I wonder if it works better in some respects then the K2? > > I would guess the K1 is free from the odd noise the K2 > made at times when tuning, and frequency shifts between filter settings, > and maybe the vfo is cleaner then DDS stuff? > > Brett > N2DTS > > 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 Brett Gazdzinski
--- Brett Gazdzinski <[hidden email]> wrote: > While waiting for the bugs to be worked out of the > K3, I ordered > a K1 for 80 and 40 meters. The 80 meter parts are > backordered > for a week or so, but I have some questions about > the rig. > > Is it not possable to get a 4 band one with > 80,40,20,and 15 > meters on it? > If not, what is the reason? The filter board on a four band K1 has two inductors and switched capacitors. 40, 30 share one inductor. 20, 15 share one inductor. This is true for each filter section. I set my K1 up for 17M instead of 15. > > My main reason for getting the K1 is so I can use it > in the den to rx > some cw for practice, without running off to the ham > shack and ignoring my wife. > She can watch TV while I copy code with walkman > style headphones. > > I read all the reviews, and they are very good. > If I make the tuning range 100kc, will the tuning > rate > be too fast? I first set the tuning for 150 KHz, tuned way to fast and changed it to 80 KHz. After a while I wanted more range and set it to 130 KHz, made a few QSOs at 7120 KHz but did not like the rate of tuning and went back to 80 KHz. > The K1 seems very analog (with computer control), > and > I wonder if it works better in some respects then > the K2? > I do not have a K2, waiting for a K3 to show up. I have 48 states worked 47 QSL. > I would guess the K1 is free from the odd noise the > K2 > made at times when tuning, and frequency shifts > between filter settings, > and maybe the vfo is cleaner then DDS stuff? I changed the 17M band for 15M a few months ago. There is one birdie on 15m near the high of of the tuning range (if 80 KHz) other than that it is very clean 73, Ty, W1TF K1 #1423 > > Brett > N2DTS ____________________________________________________________________________________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ _______________________________________________ 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 Don Wilhelm-4
Don,
Thanks for the K1 info. Is there ay reason you cant make the K1 tune higher in freq by tuning the knob clockwise? I think the manual said it tunes the other way... No one makes a 15 turn 10K pot? That would make it tune nice I suppose.. > > A properly operating K2 does not have the problems you suggest - the > tuning 'pops' are the result of an open RFC15, and it covers all bands. > The K2 receiver is more sensitive than the K1, so you may want to > reconsider your choice.] I was talking about the reported little tics as the rig is tuned, something switches in the circuit that generates the LO frequency, I read it in the K2 manual. I never noticed it till I read about it here, and I cant say it bothered me, but it is there..(or was on my K2)... I dont think you can get rid of the slight frequency changes as you change filters, or am I wrong about that? > > 73, > Don W3FPR > > Thanks for the info, I cant wait to get the K1 to play with but its back orderd.... Brett N2DTS _______________________________________________ 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 Brett Gazdzinski
Brett wrote:
>Is there ay reason you cant make the K1 tune higher in freq >by tuning the knob clockwise? That's the way the K1 works, unless the leads to the VFO pot have been mis-wired. > I think the manual said it tunes the other way... The frequency of the VFO does tune *lower* as the VFO pot is turned clockwise, but since the VFO frequency is subtracted from the filter board hetrodyne oscillator frequency to generate the local oscillator frequency, the operating frequency of the K1 *increases*. > No one makes a 15 turn 10K pot? That would make it tune nice I have always been perplexed by the persistent claims that K1 VFO tuning is too rapid or too touchy. It definitely is neither, even if the 170 kHz VFO option is used. What is touchy is the VFO pot *shaft*, since it has no substantial resistance to motion. When you remove your fingers from the knob, it is almost impossible to keep from introducing some minor position disturbance. This can very easily be eliminated by the addition of some thin soft felt "washers" around the VFO pot shaft between the back of the VFO knob and the front panel. A small amount of shaft resistance to rotation greatly improves the feel of the tuning, regardless of the VFO span option used. I know of no one complaining of K1 VFO touchness who has bothered to try this often repeated and very simple solution. Mike / KK5F _______________________________________________ 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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I get about 56 kHz range for the 10 turns. Used both
the 68pF and the 120pF in series for "C2". Have a great week ahead! Ken, KA0W >No one makes a 15 turn 10K pot? That would make > it tune nice > _______________________________________________ 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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