First, I don't intend to transmit on both VFO's at the same time. I only have one transmitter. But I do like having the ability to do an instant QSY. Here are a couple of examples of how I use this capability.
“Multi-tasking”. You are chasing a goal: states, grid squares, thirteen colonies, Rt 66, etc. There is lots of activity on FT4 and FT8 and you don’t want to miss that tough one to find just because it was on the mode you weren’t using. So you switch back and forth as needed. “Picture in Picture”. There’s a DXpedition using FT4 on a non-standard frequency but the band isn’t open yet. So, you want to continue working states while you watch for the DXpedition. This works particularly well with the digital modes because the decoding not only gives you call sign and location, but you can see how others are doing. One DXpedition that I watched was running Fox/Hound and I could see lots of stations calling but there were no exchanges. I'm sure there are examples that others can suggest. 73 Logan, KE7AZ -----Original Message----- From: elecraft-boun...@mailman.qth.net <elecraft-boun...@mailman.qth.net> On Behalf Of Nr4c Sent: Tuesday, August 20, 2019 4:03 AM To: Dave <rocke...@gmail.com> Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] K4 Use Case Question - Support for multiple instances of WSJT-X I think you need a K4D with the second ADC. You’d have VFO A in left ear, VFO C in right ear. Two instances (installed in two separate folders) WSJT, one listening to left channel, other listening to right channel. But you have to keep up with which is transmitting. Once you start a ASO on VFO A you don’t touch VFO C. What’s to gain in this scenario? Sent from my iPhone ...nr4c. bill > On Aug 20, 2019, at 6:34 AM, Dave <rocke...@gmail.com> wrote: > > Dave, > > Will be interesting to hear official answer from Elecraft. > > A competitor’s radio does exactly what Logan outlined. You would bring up two > instances of WSJT-X. Only one can transmit at a time. > > Dave wo2x > > Sent from my iPad > >> On Aug 20, 2019, at 3:38 AM, David Gilbert <xda...@cis-broadband.com> wrote: >> >> >> I'm no expert by any stretch of the imagination, but it doesn't sound to me >> like that would be effective with any single rig, K4 or otherwise. >> >> First off, as best I can tell you need to assign different rigs to the >> multiple instances of WSJT-X if run on the same computer. I don't believe >> you can assign the same rig to two different instances unless you use two >> separate computers, and then you have the nasty problem of feuding CAT >> signals. Please correct me if you have found that statement to be erroneous. >> >> Secondly, you can't simultaneously transmit on both frequencies (unless you >> use Fox/Hound mode, which is an entirely different matter) and you can't >> receive on one frequency while transmitting on the other so you end up >> staggering your QSOs with no gain in effectiveness ... other than maybe >> quicker band switching than doing it manually. >> >> It seems to me that to gain any benefit without using Fox/Hound you need two >> separate transmitters, of course fed through a passive combiner if using the >> same antenna. >> >> Or what am I misunderstanding? >> >> 73, >> Dave AB7E >> >> >>> On 8/19/2019 11:06 PM, Logan R Zintsmaster wrote: >>> Here is a use case question.. >>> >>> The radio is connected to a single antenna. >>> >>> VFO A is tuned to 14.074 MHz and VFO B is tuned to 14.080. >>> >>> An audio data stream from the VFO A frequency is "connected" to an >>> instance of WSJT-X decoding FT8. >>> >>> A second, independent audio stream from the VFO B frequency is >>> concurrently "connected" to a second instance of WSJT-X decoding FT4. >>> >>> Both instances of WSJT-X decode their respective audio streams, >>> concurrently. >>> >>> Starting a QSO in either instance of WSJT-X switches the transmitter >>> to the appropriate VFO for the duration of the QSO. >>> >>> The audio stream for the instance of WSJT-X not in the QSO is >>> interrupted while the transmitter is operating. >>> >>> >>> Can a K4 support this use case or is a K4D required? >> Dave, > > Will be interesting to hear official answer from Elecraft. > > A competitor’s radio does exactly what Logan outlined. You would bring up two > instances of WSJT-X. Only one can transmit at a time. > > Dave wo2x > > Sent from my iPad > >> On Aug 20, 2019, at 3:38 AM, David Gilbert <xda...@cis-broadband.com> wrote: >> >> >> I'm no expert by any stretch of the imagination, but it doesn't sound to me >> like that would be effective with any single rig, K4 or otherwise. >> >> First off, as best I can tell you need to assign different rigs to the >> multiple instances of WSJT-X if run on the same computer. I don't believe >> you can assign the same rig to two different instances unless you use two >> separate computers, and then you have the nasty problem of feuding CAT >> signals. Please correct me if you have found that statement to be erroneous. >> >> Secondly, you can't simultaneously transmit on both frequencies (unless you >> use Fox/Hound mode, which is an entirely different matter) and you can't >> receive on one frequency while transmitting on the other so you end up >> staggering your QSOs with no gain in effectiveness ... other than maybe >> quicker band switching than doing it manually. >> >> It seems to me that to gain any benefit without using Fox/Hound you need two >> separate transmitters, of course fed through a passive combiner if using the >> same antenna. >> >> Or what am I misunderstanding? >> >> 73, >> Dave AB7E >> >> >>> On 8/19/2019 11:06 PM, Logan R Zintsmaster wrote: >>> Here is a use case question.. >>> >>> The radio is connected to a single antenna. >>> >>> VFO A is tuned to 14.074 MHz and VFO B is tuned to 14.080. >>> >>> An audio data stream from the VFO A frequency is "connected" to an >>> instance of WSJT-X decoding FT8. >>> >>> A second, independent audio stream from the VFO B frequency is >>> concurrently "connected" to a second instance of WSJT-X decoding FT4. >>> >>> Both instances of WSJT-X decode their respective audio streams, >>> concurrently. >>> >>> Starting a QSO in either instance of WSJT-X switches the transmitter >>> to the appropriate VFO for the duration of the QSO. >>> >>> The audio stream for the instance of WSJT-X not in the QSO is >>> interrupted while the transmitter is operating. >>> >>> >>> Can a K4 support this use case or is a K4D required? >>> >>> Can this use case be supported if each instance of WSJT-X is in a >>> different band? >>> >>> >>> 73 >>> >>> Logan, KE7AZ >>> >>> >>> >>> ______________________________________________________________ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:Elecraft@mailman.qth.net >>> >>> This list hosted by: http://www.qsl.net Please help support this >>> email list: http://www.qsl.net/donate.html Message delivered to >>> xda...@cis-broadband.com >>> >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net Please help support this >> email list: http://www.qsl.net/donate.html Message delivered to >> rocke...@gmail.com > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html Message delivered to > n...@widomaker.com ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to lra...@garlic.com ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
