[Elecraft] K2 #5339 - deaf on 10 & 12m

[2m0kdz at beeb.net]

Well, it's built! KSB2 and KIO2 installed and run fine.

Only one problem so far - it's deaf on 10 & 12m. It's probably the LP or BP filters, but I'm not entirely sure.

I tried the transmitter alignment on these two bands and couldn't get any more than 0.7 watts on the power display before the Hi-Cur warning came up. I had a very close look at all the soldered connections around the K10 relay and re-did them. I also checked the continuity of L21 & L22. I then repeated the TX alignment and the power display got beyond 2 watts without the Hi-Cur warning. Only problem: the power meter on my ATU didn't register anything.

Signal tracing is probably the best way of getting at a solution, but I don't have access to a signal generator.

I would appreciate any help. 

73

Bob 
2M0KDZ