Thanks Joe & Guy. I've had a look at the schematic and that makes sense. I'll have a look for the 5V on the PTT IN connector and if it's missing, I'll trace it back. I'll take the K3 apart tonight and make a start. If it turns out to be an open RFC, that'll be a simple fix.
Thinking back, I had an RFC go open on my K1 at one stage way back, for no apparent reason. Took me a while to find it because at the time, I really didn't think RFC's were that fragile and that thew me off. Anyway, I learnt a lesson. Perhaps the same one here... we'll see. Thanks for the advice. John VK7JB -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-PTT-IN-problem-cont-d-tp7457978p7458240.html Sent from the Elecraft mailing list archive at Nabble.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