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amplifier design

  1. VA1DER

    Realistic receiver amp circuit analysis comparison attempt (STA-77 vs QTA-753)

    I have been doing some refurbishing of old Realistic receivers and trying to analyze some amplifier finals of the day. It started when I was really impressed with the sound quality coming from an old STA-77. I'm trying to get a feel for exactly what everything is doing. Here is it's main amp...
    • VA1DER
    • Thread
    • amplifier design qta-753 sta-77
    • Replies: 3
    • Forum: Solid State
  2. wparks

    Cheap germanium amplifiers and FREE service literature for fun and learning . . .

    I don't see a lot of posts on Germanium transistor amplifiers, and wanted to throw a shout out to a really cheap, fun, area ready for learning and experimentation- I have been tinkering lately with the 12V germanium amplifiers found in extremely affordable 8-track automotive decks from the late...
    • wparks
    • Thread
    • 8-track amplifier design germanium
    • Replies: 3
    • Forum: DIY
  3. PROJECT 2501

    Does a high DC offset cause excessive heat?

    Marantz model 32 amplifier. DC offset of 89mv on the right channel and noticeably higher heat radiating from the right heatsink. Any correlation? Red flag?
    • PROJECT 2501
    • Thread
    • amplifier design dc offset heatsink marantz marantz amplifier troubleshooting
    • Replies: 11
    • Forum: Solid State
  4. RogerMod

    Burning Amp 2018 is at Fort Mason , SF, CA 9/30

    http://www.burningamp.org/ Nelson Pass will be speaking on his latest Solid State efforts, as always. I will be speaking on tube applications in preamps and and "not in the book" power tube applications like the RM-10. Have a look at the webside and join us. Thats Sunday 9/30th
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