Hi Real, I have fixed the radio.!!
I removed the FINAL and tested it in a jig. It was not faulty. There was a lot of sticky melted glue on the heatsink to the back of the FET. I cleaned with alcohol and a file. I reseated the FINAL and toughened the heatsink. The radio is now perfect!.
Speak soon
73?
Scot
M0RWV
