Roy,
The thermal pads are probably fine. On my KPA100 I found the same, after having
ordered a new set of pads. I would keep them as spares.
The 1k resistor across RFC3 is to reduce an 80m resonance in the KPA100 T/R
switch circuit. It should be OK mounted on either side of the PCB, provided
When I was putting in the latest mods in my KPA100 and had the PC board
separated from the heat sink, I noticed that the thermal pads looked really
worn. I believe the bottom of the 2SC2879s could actually make contact with
the heat sink in places. There is a black non-conductive coating on
Roy Morris wrote:
I don't think the
mounting surface of the 2SC2879 is a part of the circuit because the
two mounting screws make contact between the transistor and heat sink
anyway. The thermal pads are only used for heat transfer and not for
circuit isolation. Am I right about this?
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