[Elecraft] K2 VCO alignment

[Don Wilhelm]

Paul,

8 volts on R30 usually means the VCO is not oscillating.  Try your counter 
probe on TP1 to see if there is any frequency indicated - if so, check that 
the frequency is correct for the band you are on (likely 40 meters at this 
stage of construction) - the low band edge frequencies are listed in 
Appendix B of the manual on the K2 Schematic Key sheet.

If you have no frequency indication at TP1, put the probe (carefully so not 
to short adjacent pins) on U3 pin 3.  If you have a nearly correct frequency 
at either of these locations, the VCO is oscillating and the trouble lies 
elsewhere.

Let us know what you find.

73,
Don W3FPR

----- Original Message ----- 

>I am on page 61 of the K2 manual on VCO alignment. All
> previous tests have been OK. In connecting a DMM to
> ground and R30 I get a reading of 8 volts, which is
> unacceptable. I have rewound T5, replaced C72 with a
> new cap and replaced L30. I have also verified that
> the 6 varactor diodes are of proper values. Any ideas
> out there? Thanks Paul, NN5G
>