LLoyd, How old is your K2 kit? Take a look at the MPS5179s on the Control Board at Q9 and Q10 - if they are blue (rather than black), they are the cause of your problem. Elecraft will supply replacements for you if they are the blue-faced ones. In the meantime, you can use 2N2222s in their place if you want to get up and running quickly (borrow the 2 2N2222s from the later part of the RF board aseembly).
Other than the above 2N5179 problem or an improperly constructed counter probe, I can't think of any reason you should not see proper readings on the CAL FCTR display. Check the connection of your probe to the Control Board - the shield should be closest to the left side panel - should you have it backwards, it will behave as you have described. 73, Don W3FPR > -----Original Message----- > > OK, I got to p.60. Plugged in the freq. probe, got it > to TP3, did the CAL thing, and got 0000.00. Tried to > measure with my DMM's freq counter with that still > connected...and while doing this, the K2 read about > 10.96 something, changing rapidly. Disconnected the > DMM from TP#, the K2 read 00000.00 again. The DMM, > meanwhile, read 12.01 at TP3. > > I tried the VCO test at TP1, got 0000.00. Went to > troubleshooting, using my RF probe, checked the > Reference Oscillator output, got 0.767 Vrms. VCO > output = 0.418 Vrms. VCO Buffer output = 0.677 Vrms. > All seemed good! > > TP2 showed something, didn't write it down, but it > was, like, 4912 or something...showed my > carefully-built probe was working, I suppose. > > > Then I checked some voltages, and found some wacky > stuff. On U4, pin 5 was zero. pin 7 was 5V. pin 8 > showed rapid variation. Others were ok. > > On U5, pin 1 was 5V, and pin 2 was zero V!!! others > were ok. Yow! > > on U1, pins 9 and 10 showed rapid variation, others > were ok. U2, U3, U6, U8, U11 and U12 were all ok. > > Q17 had a D of 1.637, others ok. Q18 had S of 1.615 > and D of 7.92. > > That's all I had time to check...hopefully, it's > enough for someone to suggest what to look for. > > Thanks! > > LL/K3ESE > _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
