Hi Gentlemen! I'm in progress of assembling my first K2 #7837 and now I'm stuck with PLL reference oscillator test. Seems that I've already read all previous email threads regarding similar problems all over the internet - and nothing helped.
When I just turn on my K2 after some time it's been off - I'm getting the following figures in PLL reference test (TP3): - Band + is 12099.1 khz - Band - is 12086.15 khz After some time (just a minute or so), the BAND+ value starts drifting down. Drifting slows down with time, but in 2-3 minutes I'm getting 12070 or smth like that. If I touch RIT/XIT knob - the value drops even lower - to 12055 or about that. I repeated the test for may be hundred times already - with fully assembled case, with/without top/bottom covers, etc. BAND- value never changes and is absolutely stable. If I then click BAND- and leave it for a few minutes, then click BAND+ again - drifting start over again from ~12090. Things only get better (BAND+ gets abt 12104 and keeps stable) when I connect DMM (voltage) between gnd and D16's cathode. I've already checked all solderings, RFC14, re-assembled thermistor board, checked voltages on U5/U6/D16/D17 - everything looks good to me. Thanks in advance for any ideas... With regards, Ilya, R3XA ______________________________________________________________ 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 Message delivered to [email protected]
