I wonder if the K4 & tuner could a good enough approximation based on RX signal level or even background noise level.
When I've done this manually, for both outside and within the ham bands, using the L & C on my external tuner, I can hear the difference and know generally where a good match is found. Surely the K4 could do better than my ears. Seems like this would be possible without even transmitting. Could be a great feature. 73 Andrew NV1B .. On Mon, Apr 11, 2022 at 9:50 AM Magnus Danielson via Elecraft < [email protected]> wrote: > Hi, > > So, beyond the fun of doing QSOs, I also listen to intermediary bands. > Sometimes however it is clear that it would be good to have the ATU tune > up. So the manual procedure I do is to go to nearest band, tune there, > and go back. This way I will not transmitt out of band, and the tuning > is not really perfect for my listening, but I have noticed that > listening condition becomes better so this approximation kind of works. > Now, it would be great if just hitting the ATU TUNE would do this for me > in the background, so hence a feature request. > > Technically, one wants to use the mid point f2 = sqrt(f1*f3) where f1 is > the upper side of lower band and f3 is the lower side of the upper band > from the frequency fVFO. If fVFO < f2, then tune on the upper side of > lower band, else tune on the lower side of upper band. > > The radio will need to know the legal borders of the bands for the > country to do this. Also, you most likely want to have a configuration > variable to enable/disable this feature. When disabled, todays behaviour > of refusing tuning can be used. > > Cheers, > Magnus > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
