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 arch...@mail-archive.com
