Another batch of DF9IC 23cm SSPA heat spreaders

Trying a new approach for the output N socket, with M3 x 0.5 formed threads in the end of the spreader.  Seems to work well. I used the thread-forming tap for all of the holes.

Test fit with one of the FETs (wrong way round)

Face-milling with an 80mm end mill

Milling the FET slot


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