K3 CW Rx Audio
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Paul - what a great idea, I wonder why -I- didn't
think of it? !!! The K3 is so versatile. Everthing I try provides an afternoon or more of radio enjoyment. There are more buttons on brand I, Y and K, but I never had as much fun trying things with those sets. I did something like this QSK split with the TS480, but on CW it still did not provide exactly what I was looking for. The K3 does not save the SPLIT setting to my memories, seems like it should. No worries, I am just a button pushing cowboy. ;-) Great suggestion. [Elecraft] K3 CW Rx Audio Paul Christensen w9ac at arrl.net Sun Apr 20 16:56:52 EDT 2008 Previous message: [Elecraft] K3: Desired improvements Next message: [Elecraft] K3 CW Rx Audio I tried something last night that may be of interest to some CW ops. Although most of us are always in search of ways to narrow CW bandwidth, there are times when listening to CW is made more enjoyable when the receiver is allowed to open up a bit, especially with AFX activated. In order to engage in wideband CW reception with the wider crystal and DSP filters, press SPLIT, then A=>B. Set VFO A for either LSB or USB. Then, set VFO B to CW. Next, press and hold the SUB button to link VFO A with VFO B. The CW offset can be made to match the sidetone frequency by setting VFO A and B to slightly different frequencies (difference being the side-tone frequency). I stored my settings into memory so I don't have to go through all the gyrations next time. With this approach, the rig is transmitting CW on VFO B, but listening in either LSB or USB on VFO A. It's important to set the Rx frequency on VFO A up by the offset amount (e.g., 600 Hz) for CW LSB receive, and down by the offset amount for CW USB receive. My tests show that QSK performance remains super-fast and is not affected with this procedure. Paul _______________________________________________ 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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G"morning, Don:
In the CONFIG menu, there is a SPLT SV entry which you can turn ON to save the split. I just tried it on #202 with latest firmware and it works here. 73, Ken K3IU Don Rasmussen wrote: > The K3 does not save the SPLIT setting to my memories, > seems like it should. No worries, I am just a button > pushing cowboy. ;-) > > _______________________________________________ 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 the CONFIG menu, there is a SPLT SV entry which you can turn ON to save
> the split. I just tried it on #202 with latest firmware and it works > here.73, Ken K3IU Ken, Good job. With that suggestion, the entire procedure I mentioned (including split recall) is now automated by saving into memory. (almost like a macro?) Even better, by activating SPLT SV as you mentioned, one can band hop and go right back to the saved split settings without having to recall the memory. For example, I had called the CW Rx split procedure as I described for 40M -- then tuned around on 20M SSB for a while and came back to 40M where all settings were brought back with the just the band change button. Even tried powering down the rig, and all settings came back at power-up. Probably the only distraction with the procedure is that the lower, smaller frequency display becomes the "real" operating frequency for CW off-set purposes. Oh, and CW spot will not work this way either. So, opening up the DSP filters in a future f/w release for CW Rx mode is still the preferred way of accomplishing this. Still, the flexibility to accomplish this in the K3 and still retain all the QSK attributes is damn impressive. Paul, W9AC _______________________________________________ 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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Ok, as it is now you can open up CW rx all the way to 2.8 kHz if you
like with the 2.7 kHz filter installed - and *enabled* for CW mode. Do you have the 2.7 kHz filter enabled for CW mode? If not, then I can understand the need for this split setup to "open up the DSP filters" for CW rx. Since filters are enabled on a per-mode basis, things can get a bit confusing. Bob NW8L On Mon, Apr 21, 2008 at 6:44 AM, Paul Christensen <[hidden email]> wrote: > > > In the CONFIG menu, there is a SPLT SV entry which you can turn ON to save > the split. I just tried it on #202 with latest firmware and it works > here.73, Ken K3IU > > > > Ken, > > Good job. With that suggestion, the entire procedure I mentioned > (including split recall) is now automated by saving into memory. (almost > like a macro?) Even better, by activating SPLT SV as you mentioned, one can > band hop and go right back to the saved split settings without having to > recall the memory. For example, I had called the CW Rx split procedure as I > described for 40M -- then tuned around on 20M SSB for a while and came back > to 40M where all settings were brought back with the just the band change > button. Even tried powering down the rig, and all settings came back at > power-up. > > Probably the only distraction with the procedure is that the lower, smaller > frequency display becomes the "real" operating frequency for CW off-set > purposes. Oh, and CW spot will not work this way either. So, opening up > the DSP filters in a future f/w release for CW Rx mode is still the > preferred way of accomplishing this. Still, the flexibility to accomplish > this in the K3 and still retain all the QSK attributes is damn impressive. > > Paul, W9AC > > _______________________________________________ > 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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Bob,
This has been re-hashed before by myself and others but here goes... The K3's CW receive bandwidth is presently limited to no greater than 2.8 kHz, even when the optional 6 kHz filter is installed. At the moment, the DSP is the limiting factor. I would rather not re-visit the rationale for wanting a wider CW receive bandwidth as that is covered in detail within the list archives. The procedure that I described is a means of opening up the receiver beyond 2.8 kHz while being engaged in a CW QSO. Simply put, it allows the use of SSB mode with an offset for CW reception (VFO A), while using CW mode ( on VFO B) for transmission. 73, Paul, W9AC ----- Original Message ----- From: "Bob Cunnings" <[hidden email]> To: <[hidden email]> Sent: Monday, April 21, 2008 10:27 AM Subject: Re: [Elecraft] K3 CW Rx Audio > Ok, as it is now you can open up CW rx all the way to 2.8 kHz if you > like with the 2.7 kHz filter installed - and *enabled* for CW mode. > > Do you have the 2.7 kHz filter enabled for CW mode? If not, then I can > understand the need for this split setup to "open up the DSP filters" > for CW rx. Since filters are enabled on a per-mode basis, things can > get a bit confusing. > > Bob NW8L > > On Mon, Apr 21, 2008 at 6:44 AM, Paul Christensen <[hidden email]> wrote: >> >> > In the CONFIG menu, there is a SPLT SV entry which you can turn ON to >> > save >> the split. I just tried it on #202 with latest firmware and it works >> here.73, Ken K3IU >> > >> >> Ken, >> >> Good job. With that suggestion, the entire procedure I mentioned >> (including split recall) is now automated by saving into memory. (almost >> like a macro?) Even better, by activating SPLT SV as you mentioned, one >> can >> band hop and go right back to the saved split settings without having to >> recall the memory. For example, I had called the CW Rx split procedure as >> I >> described for 40M -- then tuned around on 20M SSB for a while and came >> back >> to 40M where all settings were brought back with the just the band change >> button. Even tried powering down the rig, and all settings came back at >> power-up. >> >> Probably the only distraction with the procedure is that the lower, >> smaller >> frequency display becomes the "real" operating frequency for CW off-set >> purposes. Oh, and CW spot will not work this way either. So, opening up >> the DSP filters in a future f/w release for CW Rx mode is still the >> preferred way of accomplishing this. Still, the flexibility to >> accomplish >> this in the K3 and still retain all the QSK attributes is damn >> impressive. >> >> Paul, W9AC >> >> _______________________________________________ >> 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 > _______________________________________________ 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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Ok, that's the part that escaped me - that you wanted to go beyond the
2.8 kHz limit. The original message spoke only of "opening up", without elaboration. Now it all makes sense. Bob NW8L On Mon, Apr 21, 2008 at 9:03 AM, Paul Christensen <[hidden email]> wrote: > Bob, > > This has been re-hashed before by myself and others but here goes... > > The K3's CW receive bandwidth is presently limited to no greater than 2.8 > kHz, even when the optional 6 kHz filter is installed. At the moment, the > DSP is the limiting factor. I would rather not re-visit the rationale for > wanting a wider CW receive bandwidth as that is covered in detail within the > list archives. > > The procedure that I described is a means of opening up the receiver beyond > 2.8 kHz while being engaged in a CW QSO. Simply put, it allows the use of > SSB mode with an offset for CW reception (VFO A), while using CW mode ( on > VFO B) for transmission. > > 73, > > Paul, W9AC > > ----- Original Message ----- From: "Bob Cunnings" <[hidden email]> > To: <[hidden email]> > Sent: Monday, April 21, 2008 10:27 AM > Subject: Re: [Elecraft] K3 CW Rx Audio > > > > > > > Ok, as it is now you can open up CW rx all the way to 2.8 kHz if you > > like with the 2.7 kHz filter installed - and *enabled* for CW mode. > > > > Do you have the 2.7 kHz filter enabled for CW mode? If not, then I can > > understand the need for this split setup to "open up the DSP filters" > > for CW rx. Since filters are enabled on a per-mode basis, things can > > get a bit confusing. > > > > Bob NW8L > > > > On Mon, Apr 21, 2008 at 6:44 AM, Paul Christensen <[hidden email]> wrote: > > > > > > > > > In the CONFIG menu, there is a SPLT SV entry which you can turn ON to > > save > > > the split. I just tried it on #202 with latest firmware and it works > > > here.73, Ken K3IU > > > > > > > > > > Ken, > > > > > > Good job. With that suggestion, the entire procedure I mentioned > > > (including split recall) is now automated by saving into memory. (almost > > > like a macro?) Even better, by activating SPLT SV as you mentioned, one > can > > > band hop and go right back to the saved split settings without having to > > > recall the memory. For example, I had called the CW Rx split procedure > as I > > > described for 40M -- then tuned around on 20M SSB for a while and came > back > > > to 40M where all settings were brought back with the just the band > change > > > button. Even tried powering down the rig, and all settings came back at > > > power-up. > > > > > > Probably the only distraction with the procedure is that the lower, > smaller > > > frequency display becomes the "real" operating frequency for CW off-set > > > purposes. Oh, and CW spot will not work this way either. So, opening > up > > > the DSP filters in a future f/w release for CW Rx mode is still the > > > preferred way of accomplishing this. Still, the flexibility to > accomplish > > > this in the K3 and still retain all the QSK attributes is damn > impressive. > > > > > > Paul, W9AC > > > > > > _______________________________________________ > > > 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 > > > > > > 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 P.B. Christensen
Paul, I hate to disagree with you and others but, I would not want the DSP to go any wider than 2.8 KHz in CW unless there is a way to limit the DSP to the width of the enabled filters. As it stands now, if the radio has 12 or 6, 2.8. 1.8, 500 and 200 filters installed - the CW DSP goes out to 2.80 even if FL2 (the 2.8) is disabled. That leaves a lot of useless "cranking" on the width control. IMO, extending the DSP bandwidth in CW should be done only if accompanied by restricting the maximum width to that of the widest ENABLED roofing filter. 73, ... Joe, W4TV > -----Original Message----- > From: [hidden email] > [mailto:[hidden email]] On Behalf Of Paul > Christensen > Sent: Monday, April 21, 2008 11:03 AM > To: Bob Cunnings; [hidden email] > Subject: Re: [Elecraft] K3 CW Rx Audio > > > Bob, > > This has been re-hashed before by myself and others but here goes... > > The K3's CW receive bandwidth is presently limited to no > greater than 2.8 > kHz, even when the optional 6 kHz filter is installed. At > the moment, the > DSP is the limiting factor. I would rather not re-visit the > rationale for > wanting a wider CW receive bandwidth as that is covered in > detail within the > list archives. > > The procedure that I described is a means of opening up the > receiver beyond > 2.8 kHz while being engaged in a CW QSO. Simply put, it > allows the use of > SSB mode with an offset for CW reception (VFO A), while using > CW mode ( on > VFO B) for transmission. > > 73, > > Paul, W9AC > > ----- Original Message ----- > From: "Bob Cunnings" <[hidden email]> > To: <[hidden email]> > Sent: Monday, April 21, 2008 10:27 AM > Subject: Re: [Elecraft] K3 CW Rx Audio > > > > Ok, as it is now you can open up CW rx all the way to 2.8 > kHz if you > > like with the 2.7 kHz filter installed - and *enabled* for CW mode. > > > > Do you have the 2.7 kHz filter enabled for CW mode? If not, > then I can > > understand the need for this split setup to "open up the > DSP filters" > > for CW rx. Since filters are enabled on a per-mode basis, > things can > > get a bit confusing. > > > > Bob NW8L > > > > On Mon, Apr 21, 2008 at 6:44 AM, Paul Christensen <[hidden email]> > > wrote: > >> > >> > In the CONFIG menu, there is a SPLT SV entry which you > can turn ON > >> > to > >> > save > >> the split. I just tried it on #202 with latest firmware > and it works > >> here.73, Ken K3IU > >> > > >> > >> Ken, > >> > >> Good job. With that suggestion, the entire procedure I mentioned > >> (including split recall) is now automated by saving into memory. > >> (almost like a macro?) Even better, by activating SPLT SV as you > >> mentioned, one can band hop and go right back to the saved split > >> settings without having to recall the memory. For example, I had > >> called the CW Rx split procedure as I > >> described for 40M -- then tuned around on 20M SSB for a > while and came > >> back > >> to 40M where all settings were brought back with the just > the band change > >> button. Even tried powering down the rig, and all > settings came back at > >> power-up. > >> > >> Probably the only distraction with the procedure is that > the lower, > >> smaller > >> frequency display becomes the "real" operating frequency > for CW off-set > >> purposes. Oh, and CW spot will not work this way either. > So, opening up > >> the DSP filters in a future f/w release for CW Rx mode is still the > >> preferred way of accomplishing this. Still, the flexibility to > >> accomplish > >> this in the K3 and still retain all the QSK attributes is damn > >> impressive. > >> > >> Paul, W9AC > >> > >> _______________________________________________ > >> 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 > > > > _______________________________________________ > 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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> "IMO, extending the DSP bandwidth in CW should be done only if
accompanied by restricting the maximum width to that of the widest ENABLED roofing filter." Joe, That's a valid point and it affects the Omni VII for the same reason. While the Omni VII's bandwidth is "mode agnostic," it does take cranking the b/w control a few revolutions to get the desired value. I had actually thought of a process to engage a quick b/w recall for the Omni VII that their code developer is currently reviewing. I like your idea of limiting the DSP rx audio bandwidth to no more than the widest roofing filter for the mode. Paul, W9AC _______________________________________________ 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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