Keith,
Not a nice problem to address. I can give you some troubleshooting
information if you are willing to hang in there with me.
Eliminate the "[Elecraft]" from the subject line and reply to me
directly (not to the list).
Relay K15 is common on all those bands, but not on 80 and 40m, but that
does not explain why 15 meters is OK.
Check the resistance between pins 1 and 10 of all 3 relays - that is the
coil resistance, and if I recall, it is about 235 ohms.
Check that C73 and C74 are the correct values.
If that does not reveal the problem, you will have to measure the
open/closed state of the relays for the next step. Can you find those
relays on the schematic? They are all shown in the reset state.
73,
Don W3FPR
On 7/13/2020 2:52 PM, Keith Hamilton wrote:
I am having trouble with the K2 VCO alignment. I have moved the T5 windings
and obtained 6 volts at the left end of R30. I then went on to the chart
(table 6-1) to measure the voltages at the listed frequencies. My readings
are ok on 80 40 and 15 meters (between 1.5 to 7.5 volts) but on 30,20,17
,12 and 10 meters the voltage is 8.29 volts and does not change.
I have checked the solder connections of T5 and the value of C72 (271). The
diodes D21,D22,D23, D24, D25 and D26 are correctly installed. I also went
over the solder connections of K13, K14 and K15.
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