Guido,
I would first look at the bandpass filter - on 20 meters, capacitors C28
and C29 and trimmers C21 and C23. The symptoms sound like a bad solder
connection.
For the 17 meter problem, check trimmer capacitors C32 and C34. If that
does not produce results, then check the VFO frequency when tuned to
18000 kHz, it should be 22915 kHz (use the internal counter probe
plugged into TP1 and CAL FCTR to check the frequency if you have no
external counter.
73,
Don W3FPR
DM1GP - Dr. Guido Pelz wrote:
> Dear K2 specialists,
>
> I recently finished my K2 with (more or less) no problems. Everything is
> fine, expect the transmitter alignment for 17m and 20m. Here are the
> symptoms
> found while doing the alignment with 2W output in tune mode:
>
> 1. On 20m, the output power is rapidly changing between 0.1 and about 9W.
> 2. On 17m, I have a problem reaching 2W output. The maximum I get is 0.5W.
>
> Any idea?
>
> 73,
>
> Guido - DM1GP
>
>
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