Many thanks to those of you who commented on my K3 problem, which was that the front panel button functions were "scrambled." You've all correctly identified the problem as being a stuck pushbutton on one of the rotary encoders. The front panel buttons tap onto a voltage divider chain, whose voltage is read by an A to D convertor that tells the microprocessor which button is pressed. If one button is stuck, it messes up all the buttons because the divider chain for the other buttons is then wrong. (In effect, each button is then sitting on a wrong rung of the ladder).
In my case, repeatedly pushing the errant button caused it to start working again, at least temporarily. If the problem recurs, which I suspect is likely, I'll have to send the front panel back to Elecraft, since I'm told swapping the encoder is not an easy job. Dale at Elecraft told me this problem tends to occur with encoders that aren't used frequently. That was my situation, since the problem encoder controlled the CW keyer speed and I use an external keyer. 73, Jim W8ZR ______________________________________________________________ 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
