[Elecraft] [K2] VCO Not Oscillating

[Joseph Baxley via Elecraft]

Matt,

My reason for asserting that the VCO is not oscillating is two-fold.  One,
there is no frequency at TP1 when I touch it with the probe, but there is
when I touch TP2 and TP3.  Both of these test points show a correct
oscillation of 4.9MHz and 12.09MHz respectively.  Second, when I applied my
voltmeter to R30 and tried turn the slug for L30 there was no change in the
voltage at R30.  I will recheck both of these assertions.

I looked over my notes for Q17 and realized that I had them mis-labeled when
I wrote the first email in this chain.  Looking at the notes I have with me
the labeling is S: 0V, G: 7.14V, and D: 0.08V.  I will of course check these
again when I go back to work on the radio as well as the part types, though
I'm fairly certain they are correct.  I'm taking the night off though. 
Also, I did check U3 and U4 over several times and recall them being in the
correct orientation.  Will look again here as well. 

The action plan for tomorrow is to double check all components in the VCO
for correct value and orientation and then to re-heat the solder joints on
them.  Hopefully it will be something simple and stupid like a misplaced
part or a cold joint.  

Thanks,
Joseph



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