I’m not sure what connections are made between each radio and the amp and the other radio.
Sent from my iPhone ...nr4c. bill > On Apr 28, 2020, at 8:35 PM, Mark Goldberg <marklgoldb...@gmail.com> wrote: > > My confusion is connecting the KPA500 to both the KX2 and K3 at the same > time. I use my KPA500 with two different radios, but it is only connected > to one of them at a time. In my case it is: > > RF, RS232 and PTT in from my TS-590S > OR > RF, and PTT in from my KX3 > > I assumed that pull ups / downs when units are not powered up would mess > things up and they are not designed to be wired ored, especially when not > powered up. Since I don't have a K3, I don't know how it connects up. > > 73, > > Mark > W7MLG > > >> On Tue, Apr 28, 2020 at 4:48 PM Jack Brindle via Elecraft < >> elecraft@mailman.qth.net> wrote: >> >> I went back and reread this . My question is this - with the interrupter >> in place, does the K3 still key the amplifier? >> >> I suspect you are running into the issue of pull-ups on the K3 pulling the >> PTT signal up to Vcc. Of course Vcc when the K3 is off is 0 volts, which >> causes the KPA to key. >> We see the same issue with the BAND lines, which is why the KPA500 >> switches to 60 meters shortly after the K3 is powered off. >> >> So, I’m wondering what is going on also. More details and tests should >> resolve the questions. >> >> 73! >> Jack, W6FB > ______________________________________________________________ > 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 arch...@mail-archive.com
