[Elecraft] K2: No recieve/power out on 20M thru 10M

[Marc Glade]

I am the proud owner of K2 #4360. When I first put the unit together
everything checked out smoothly and there were no issues. I have since
added the KSB2, KIO2, KAT2, K160RX, KNB2, K60XV, and KAF2. No issues
appeared to arise after adding the modules. I had to set the K2 aside
for a month due to other commitments and upon returning to it about a
month ago I noticed I had no power out on any band. A quick check and
replacement of R50 solved this. Except now I noticed that on 20M thru
10M with a slight exception on 15M I still had no power out and also
that even with max AF gain the signal from a connected N-gen was
barely perceptible. 15M is a little different in that I can get a max
power out of 1.5W on that band and receive is also a little better but
not by much. On 160M thru 30M the rig functions perfectly fine. I have
tried re-aligning the bandpass filters multiple times to see if that
was were the problem was but could not resolve the issue. I have spent
hours looking over the rf board with a magnifying glass and a dmm
trying to find a fault or bad solder joint but haven't found anything.
My knowledge in this area is limited and I feel like I've run into a
brick wall with this issue. If there is anyone that has any
suggestions I eagerly await them.

Thank You,
Marc W1RSC
K2 #4360