RE: IF Shift thoughts
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Wayne, N6KR wrote:
> However, this is not a continuous control. We could add a menu entry, > assignable to PF1 or PF2, that would let you use the VFO knob to get > continuous I.F. shift. I like this idea. Perhaps the IF shift function could be assigned via the PF1 or 2 buttons to another control besides the VFO - the keyer speed comes to mind. Dave White [hidden email] _______________________________________________ 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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Dave White wrote:
> I like this idea. Perhaps the IF shift function could be assigned via > the PF1 or 2 buttons to another control besides the VFO - the keyer > speed comes to mind. Damned fine point... If IF shift is rarely useful for CW, and Keyer speed is never useful for SSB, then why bother using PF1/2 at all? Why not just use that knob as IF shift in modes "U"/"L" and Keyer speed in mode "C"? -- "Nosey" Nick Waterman, G7RZQ, K2 #5209. use Std::Disclaimer; [hidden email] Please sponsor me! http://www.justgiving.com/noseynick Ahhh...I see the screw-up fairy has visited us again... _______________________________________________ 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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Nick Waterman wrote:
> Dave White wrote: > >> I like this idea. Perhaps the IF shift function could be assigned via >> the PF1 or 2 buttons to another control besides the VFO - the keyer >> speed comes to mind. >> > > Damned fine point... If IF shift is rarely useful for CW, and Keyer > speed is never useful for SSB, then why bother using PF1/2 at all? Why > not just use that knob as IF shift in modes "U"/"L" and Keyer speed in > mode "C"? > > IF. I have a radio with IF-Shift and I use it on SSB. We have a small New Mexico net on 3.939 and their is a group that meets the same time on 3.401. Under the present conditions the 3.401 guys are stronger than my net people :-) So that I can hear my people with a little distortion I shift my IF down until my passband is below the bottom of the 3.401 signals. This works pretty well but is far from perfect. A perfect fix is to spread out more so you don't have to use IF-Shift. 8-) 73 Karl K5DI _______________________________________________ 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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Karl,
By 3.401, do you mean 3.9401 or 3.941? 3.401 would be far enough away to not be a problem, plus it would be well out of the ham band. :) Vin KR2F ----- Original Message ----- From: "Karl Larsen" <[hidden email]> To: "Nick Waterman" <[hidden email]> Cc: "Dave White" <[hidden email]>; "Elecraft Reflector" <[hidden email]> Sent: Thursday, August 10, 2006 7:38 AM Subject: Re: [Elecraft] RE: IF Shift thoughts > Nick Waterman wrote: >> Dave White wrote: >> >>> I like this idea. Perhaps the IF shift function could be assigned via >>> the PF1 or 2 buttons to another control besides the VFO - the keyer >>> speed comes to mind. >>> >> >> Damned fine point... If IF shift is rarely useful for CW, and Keyer >> speed is never useful for SSB, then why bother using PF1/2 at all? Why >> not just use that knob as IF shift in modes "U"/"L" and Keyer speed in >> mode "C"? >> >> > Guys you will need a way to know which direction your shifting the IF. > I have a radio with IF-Shift and I use it on SSB. We have a small New > Mexico net on 3.939 and their is a group that meets the same time on > 3.401. Under the present conditions the 3.401 guys are stronger than my > net people :-) > > So that I can hear my people with a little distortion I shift my IF > down until my passband is below the bottom of the 3.401 signals. This > works pretty well but is far from perfect. A perfect fix is to spread out > more so you don't have to use IF-Shift. 8-) > > 73 Karl K5DI > > _______________________________________________ > 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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Vin Cortina wrote:
> Karl, > > By 3.401, do you mean 3.9401 or 3.941? 3.401 would be far enough away > to not be a problem, plus it would be well out of the ham band. :) Sorry Vin, I meant to say 2 KHz above 3.939 MHz. That is hard to do this early in the day. 73 Karl > > > Vin KR2F > > > > ----- Original Message ----- From: "Karl Larsen" <[hidden email]> > To: "Nick Waterman" <[hidden email]> > Cc: "Dave White" <[hidden email]>; "Elecraft Reflector" > <[hidden email]> > Sent: Thursday, August 10, 2006 7:38 AM > Subject: Re: [Elecraft] RE: IF Shift thoughts > > >> Nick Waterman wrote: >>> Dave White wrote: >>> >>>> I like this idea. Perhaps the IF shift function could be assigned via >>>> the PF1 or 2 buttons to another control besides the VFO - the keyer >>>> speed comes to mind. >>>> >>> >>> Damned fine point... If IF shift is rarely useful for CW, and Keyer >>> speed is never useful for SSB, then why bother using PF1/2 at all? Why >>> not just use that knob as IF shift in modes "U"/"L" and Keyer speed in >>> mode "C"? >>> >>> >> Guys you will need a way to know which direction your shifting the >> IF. I have a radio with IF-Shift and I use it on SSB. We have a small >> New Mexico net on 3.939 and their is a group that meets the same time >> on 3.401. Under the present conditions the 3.401 guys are stronger >> than my net people :-) >> >> So that I can hear my people with a little distortion I shift my >> IF down until my passband is below the bottom of the 3.401 signals. >> This works pretty well but is far from perfect. A perfect fix is to >> spread out more so you don't have to use IF-Shift. 8-) >> >> 73 Karl K5DI >> >> _______________________________________________ >> 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 Nick Waterman
> -----Original Message-----
> > Damned fine point... If IF shift is rarely useful for CW, and Keyer > speed is never useful for SSB, then why bother using PF1/2 at all? Why > not just use that knob as IF shift in modes "U"/"L" and Keyer speed in > mode "C"? > ----------------------------------- Folks, If 'IF Shift' is not useful for CW, then the K2 has something better than IF Shift already. Set up the SSB FL2 thru FL4 filters carefully so that FL2 is more narrow than FL1 (the OP1 filter), then FL3 is about 200 Hz more narrow than FL2, and FL4 is even more narrow than FL3. Use Spectrogram (or equal) to determine the actual filter width - the numbers displayed on the K2 will not be correct for these wide filters, and set the low frequency corner of the passband at 300 Hz for all the filters. Spectrogram will show the proper passband positioning. When there is QRM on the high frequency side (audio frequency, it will be on the high RF side for LSB and the low RF side for USB), just tapping the XFIL button will cut the high audio frequency end and reduce the QRM. It makes no sense to me to have the ability to cut the low frequency audio end for SSB because by doing so will make the wanted signal unintelligible, but the high frequency end can be cut drastically and still maintain intelligibility - a 1600 Hz wide passband can contain adequate information for a QSO. Tuning with a narrow SSB filter becomes critical, so I recommend tuning with the normal OP1 filter, then tap the XFIL button after the desired station is tuned. Try it, it works better for me than the SHIFT control on my seldom used Yaesu. To be repetitive, IF Shift will allow you to reduce either the audio highs or the audio lows depending on which way you move it, but reducing the audio lows is useless for SSB (the low frequency content in the 300 to 700 Hz range must be maintained for intelligibility), you can achieve something better with the present K2 filters. 73, Don W3FPR _______________________________________________ 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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Going 100% QRP so I'm selling my 100 watt K2 station.
For sale: - K2 #4958 - QRP top cover - 100 watt top cover (KPA100) - noise blanker (KNB2) - audio filter & clock (KAF2) - Astron RS-20M power supply (A/V meters) - docs, manuals Very high quality construction & soldering job. This is my third K2 build, and best yet. Also built KX1 and two K1's and many accessories. Looks and works perfect. I haven't installed the microphone connector since I'm 100% CW, but it is included. $1490 includes shipping within U.S. Payment by US postal money order. --Andrew, NV1B _______________________________________________ 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-3
On Thu, 10 Aug 2006, Don Wilhelm wrote: > If 'IF Shift' is not useful for CW, then the K2 has something better > than IF Shift already. Set up the SSB FL2 thru FL4 filters carefully so > that FL2 is more narrow than FL1 (the OP1 filter), then FL3 is about 200 > Hz more narrow than FL2, and FL4 is even more narrow than FL3. > > Use Spectrogram (or equal) to determine the actual filter width - the > numbers displayed on the K2 will not be correct for these wide filters, and > set the low frequency corner of the passband at 300 Hz for all the filters. > Spectrogram will show the proper passband positioning. I did this and then found myself an AM BC station and tweaked the filters for best intelligibility. I've been very pleased with the results! _______________________________________________ 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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