• The move to the new server is done. There are some software and database maintenance updates in process. This has us passing the hat around to help out. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html

power transistor

  1. T

    Yamaha CR620 Power Transistor question

    Greetings all, I have a question regarding a Yamaha CR620 that is showing a short. It blows the main fuses when turned on. The first thing i read is that it is a bad power transistor. I have tested them and they all they have acceptable voltage drops on them all. I looked at them more closely...
  2. D

    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...
  3. dario54

    Transistor probably shortened, need ugent help

    Today I was reinstalling my beloved 2265 which came back from the tech repair for few small substitutions (power switch and some fuction lamps) into the tight niche where I alowed to put my audio equipment. Connecting all output and speakers cables, with the power switch in OFF position but the...
  4. Nicolas C.

    Problem between KEF Q65 and Proton AM 455 amp....

    I have hooked up my KEF Q 65 with a Proton AM455 (50Watts/channel). I really like the sound, warm, very precise, nice dynamics. But after a few weeks my amp fried and the repair guy told me that he had to replace the power transistor which had burned out. I started using it again and everything...
Back
Top Bottom