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insulator

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    MC2200 power transistors: which ones need insulators?

    Hi all, I have an MC2200 that recently had the right channel fail. I'm in the process of rebuilding the power section and have a few questions. Here's the rundown: 1. It is obvious this amp has been serviced before, as the transistors have date codes from 1976, 1979, 1992, and 1993. So...
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