Joe, Assuming you were correct that the K1 failed due to a high SWR on the antenna, then the most likely component to fail is diode D19. Try lifting one end of D19 and operate the K1 into a dummy load to see if it still works OK. If so, replace the zener diode.
That diode is there specifically to break into conduction in the presence of excessive RF voltage (caused by a high SWR). Sometimes it just breaks over and does not fail, but in extreme cases, it sacrifices itself to save the rest of the K1. 73, Don W3FPR On 4/8/2011 11:07 AM, af6ni wrote: > I am not the builder of the K1, so I am not familiar with the circuit. I do > have the original manual however. > This morning I was testing an antenna and I think I let the SWR get too > high. Result - the K1 is now completely dead and it appears as if my 12V > supply has a dead short across it when I try to power up the K1. > Any suggestions on where to start looking is gratefully appreciated. > Thanks and 73, > Joe > ______________________________________________________________ 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
