[Elecraft] K2 Low Sensitivity on some bands

[Chris]

I am experiencing low sensitivity on 20m and up.  It seems fine in 80 =
and 40m, and I am not so sure about 30m.  However, from bands 20m and =
up, the sensitivity is very low.  S5 signal on other receiver is only =
s1~2 on K2, regardless of modes.

I did basic check up based on some information I found here, but I don't =
have any clue why it only happens in bands 20m and up.  Any help or =
clue?  I am making it ready for the Field Day, so I will have to stick =
with 80 and 40m if I don't fix it now.

I will appreciate any input.  CAL FIL doesn't seem help much.

Thanks.

Chris  VA3UT

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