Hi Simon,
Looks great. I'm puzzled though, I still have the C403 installed and my sweeps look much like yours. The shape is only slightly different. Your initial sweeps looked like what you get without a dummy load attached. I'm just trying to confirm that it was really the C403 that fixed things, before I consider removing it from mine. Below are my sweeps.
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...And the solution is: I still had capacitor C403 in the circuit (might be an idea to add that to the sensitivity mod). After removing C403, the sweeps look great:
<20m take2.png><40m take2.png>
(The only mystery now remains the power board...)
73!
