[Elecraft] Re: k2-6321 alignment & test Part II

[Don Wilhelm]

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
>
>
>