[Elecraft] K2 VCO Alignment only 0.02V @ R30

[Don Wilhelm]

Jeremy,

Since you now have 8 volts at the left end of R30, I would wait and see 
if you can get all the band end R30 voltages into spec with adjustment 
of L30 and the turns spacing of T5.  If so, I would ignore the DC 
voltages at U4 pins 1 and 2.  Those voltages are partially a result of 
just where within the 10 kHz range of the PLL reference oscillator it 
happens to be.

I am glad to hear that you now have it working within a reasonable range 
- good work.

73,
Don W3FPR

On 2/2/2013 9:18 PM, JeremyJones wrote:
> Thanks Don,
>
> I'll rewind T5 and see where that gets me.
>
> U4 pins 1 and 2 are still low (no change), and U7 pin2 and U4 pin5 are
> equal.  Do you still suspect there may be an issue with U4?
>
>