[Elecraft] [K2] K2 signal tracing progress and questions arising

[Paul Fletcher]

Don Wilhelm-4 wrote:
> 
> A drop in signal at the receive output of the LPF could also be caused 
> by a T/R switch problem.
> 

Update so far. Having terminated the LPF's in a 50 ohm resistor I can
definitely confirm all of the LPF's are fine. I measured swr and monitored
in / out on the scope and loss is negligible. As soon as I reinstate W1 the
output of the LPF is pulled low (50% of level when terminated with 50 ohms).
I guess the next step is to do the same check with the chain broken after
the T/R switch and progressively work down the chain. The is no ground short
on the input to the band pass filters at DC. I can't directly terminate the
T/R switch at W6 because of the DC bias so what value blocking cap should I
use?

Any other thoughts appreciated.

73 Paul M1PAF
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