[Elecraft] [K2] PLL Reference Oscillator Question

[Don Wilhelm]

Byron,

Fine on all that, so far so good - next is to check L31, X1, R21, D18, 
C84 and C85 for good soldering, and make certain D16 and D17 are 
oriented correctly.
If nothing is found awry, I would arbitrarily replace X1 as the first 
step and after than D16 and D17.  Remember that this is just like a VXO 
circuit, no real 'magic', you add capacitance (that is what the 
varactors should be doing at lower voltages) and the frequency shifts 
downward.

73,
Don W3FPR

bviets wrote:
> Don,
> I also took the liberty to do the checks on: RP2 pin 2, and the cathodes on
> D16 and D17 and they all behaved like U6 pin 1: 7.4 and zero when switching
> between BAND+ and BAND-.
> 73,
> Byron
> N6UI
>   
>