[Elecraft] K2 Test 2 OK, Test 3 power output problem

[Jukka Tarvainen (OH4MFA)]

Hi!

I got to test and alignment part 2 last friday. Everything went according
to the test procedure. 40 m RX worked well and I spent some time well into
saturday night listening band with wire hanging from my balcony. It was
quite amazing to hear stations with something I put together myself. Thanks
to the great instruction manual!

In sunday assembly part 3 was finished and I went on with test and alignment
part 3. When I set 2 W and hit TUNE the power displayed stays 0.2-0.3 No
change when adjusting L1 and L2. There is quite good peak when adjusting
for RX, so I believe BPF is OK. I have been looking for bad solder joints
in transformers and LPF. Already did again 40 m LPF toroids. There is some
attenuation in the middle on 40 m lpf (crossing of L25, L26, C226, C228
and C229) when doing cheap and dirty signal tracing. Is it normal or may
I have some problem there? Bad cap? All bands RX seem to be ok, but same
power problem on all.

I will check all parts once again and do voltage checks as per troubleshooting.
Any other ideas? I don't have access to test equipment, only DMM, XG1 and
N-gen. I sent e-mail to Elecraft support already, so I believe I get information
from there too.

73 de
Jukka OH4MFA
K2 #4293
Jukka O. Tarvainen, OH4MFA
-oh4mfa at sral.fi
-jukkaotarvainen at suomi24.fi

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