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

[Robert 'RC' Conley]

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
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VCO alignment  voltage easily adjusted to 6.00vdc at 4.000 Mhz
3500 vdc is 24.99vdc
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I'll continue along
As always thanks again thanks for you superb knowledge and assistance
RC kc5wa
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On Dec 12, 2007 5:12 PM, Don Wilhelm <w3fpr at embarqmail.com> 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
> >
> >
> >
>