Don I didn't see it first. So took Sis to dinner had pizza and when I cam back rechecked again. I found a pin on relay K14 that had a bad solder joint. So re-flowed all of them in the area. VCO Test now 8587.24 mhz ----- VCO alignment voltage easily adjusted to 6.00vdc at 4.000 Mhz 3500 vdc is 24.99vdc ----- I'll continue along As always thanks again thanks for you superb knowledge and assistance RC kc5wa ----
On Dec 12, 2007 5:12 PM, Don Wilhelm <[EMAIL PROTECTED]> wrote: > RC, > > The PLL is just fine, but the VCO is not on the proper frequency - and > that fact is why the voltage at R30 does not adjust - it is simply too > far out of the expected frequency range. > > It sounds like C71 is not actually connected in the circuit. Check the > soldering, particularly in the VFO Range Selection area. Look at the > schematic (RF Board sheet 1) to identify the components connected to > relays K13, K14 and K15. Be certain those relays and varactors are > oriented correctly. > > 73, > Don W3FPR > > > Robert 'RC' Conley wrote: > > PLL Referance Oscillator Range test page 63 "G" Manual > > Hi freq=12098.28 > > Lo freq=12083.48 > > range=14.76 > > Range must be between 9.8 and 15Khz > > ----- > > VCO > > CAL FCTR Test TP1 should see reading between 8 and 10 MHZ > > actual reading is 18, 493.77 MHZ > > I think this is a little high > > ---- > > VCO voltage does not adjust > > DMM flickers at 0.017 / 0.18 vdc > > > > > > > _______________________________________________ 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
