Lloyd,
The first thing you should do is adjust the Pre-mixer and RF Bandpass
filters for the 20 meter band. See the K1 manual for the adjustment
procedure.
If that does not bring the output up to at least 5 watts (when using a
13.8 volt or greater power source), then suspect the 22MHz crystal used
for the 20 meter mixer.
73,
Don W3FPR
On 9/9/2019 9:14 PM, LL wrote:
I recently bought a two-band K1, s/n unknown. It puts out 6W on 40m, but
only one watt on 20m, measured with a WM-2 and a dummy load... and the
display on the rig. Internal ATU installed. 13+V supply.
What to check first? etc.
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