UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Trio Kenwood TR-9000 TX issue

Jon_G4MDC · 13th Nov 2018, 9:02 pm

I had this once with flange mount RF power transistors.

It took a microscope picture of the surface of the 4 leads, 2x emitters , the base and collector, which clearly showed milling marks, to prove these were pulls which had been "duffed up".

They had been flattened, planed, and then plated again. They even had depressions in the flange which marked where the old screws had been.

Purchasing bloke who got them from his"old mate" - no comments.

13th Nov 2018, 9:02 pm	#34
Jon_G4MDC Nonode Join Date: Nov 2015 Location: Welwyn Garden City, Hertfordshire, UK. Posts: 2,015	Re: Trio Kenwood TR-9000 TX issue I had this once with flange mount RF power transistors. It took a microscope picture of the surface of the 4 leads, 2x emitters , the base and collector, which clearly showed milling marks, to prove these were pulls which had been "duffed up". They had been flattened, planed, and then plated again. They even had depressions in the flange which marked where the old screws had been. Purchasing bloke who got them from his"old mate" - no comments.