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
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