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transistors specifications

  1. H

    NAD 3020A PHONO SECTION TRANSISTORS

    Recapped, and more, NAD 3020A sounds fantastic in all regards except for a heavy sounding phono section. About to test the transistors as a final attempt to get it working perfectly. Please can anyone add advice to my suggested approach? So, looking at the attached photo I'm thinking of...
  2. M

    Yamaha cr-820 Output transistor Mouser part numbers

    Hello fellow Yamaha AK members; I am working on a cr-820 which has the "no output, lights up, no relay click" syndrome. I have gone through the older threads which were helpful in focusing me in on the right areas. I have a TR721 transistor which reads 230 degrees when I point my thermometer...
    • MiKokomojoe
    • Thread
    • no output transistors specifications yamaha
    • Replies: 31
    • Forum: Yamaha
  3. tusntuk2

    How do you tell what is most important when substituting transistors?

    A constant topic - transistor substitution. I needed a sub for a 2sc1222, and as the dates on the threads change, so do the answers. Some is due to obsolescence, of course, but it is changes due to the understanding of how the transistor is applied in the circuit that seem the most important -...
    • tusntuk2
    • Thread
    • 2sc1222 compare transistors equivalent ka-3500 muting circuit transistor replacement transistor substitute transistors specifications
    • Replies: 6
    • Forum: Solid State
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