Luc, It certainly sounds like a marginal PLL crystal to me, or possibly a failing Q19. I would arbitrarily replace both of them.
73, Don W3FPR > -----Original Message----- > > Hello YLs and OMs, > I have an annoying trouble with the PLL reference oscillator in my K2 > (1028): > I use the K2, ever for hours, without any trouble. I switch it off. > I switch it on within minutes : the PLL reference oscillator does'nt > oscillate anymore > I switch the K2 off and wait for 10 to 20 minutes : the PLL reference > oscillator starts then like a charm. > Of course, I've inspected and redone all the solder joints, looked for > solder bridges, defect or unsoldered parts, and even more. I've > tested the > oscillator transistor Q19 and the diodes D18 and D16, looked for defect > resistors or chokes (L31) and other discontinuities without detecting > anything false or suspect. > I tried to reproduce the trouble by heating the board with an hair dryer, > without any success. > Has anyone verified such a annoying behaviour ? > Any idea ? > Thanks for help and suggestion. > 73 > Luc F6HJO/HB9ABB > _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
