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RE: good push pull 2A3 design schematic

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In Reply to: RE: good push pull 2A3 design schematic posted by vinnie2 on September 17, 2017 at 07:33:22

Vinnie if you can spend a little money now might be a good time to pick up a couple of interstage transformers. In a push pull they do 4 things I really like: choke load, low voltage drop, phase splitter, and no coupling cap.

Not sure if Dave below is using that set up on his pp 300b but he could wind you some killer units to get the job done with various tubes so you could bread board different amps. On the cheap Hammond makes some units which Andy has played with some success.

Audio design guide on the web has a ton of schematics. Look at the parts count on a interstaged 2 stage pp amp. You could clip board one up in a few hours. Keep up the good fight.

Enjoy the ride
Tom

Follow Ups:

RE: good push pull 2A3 design schematic - vinnie2 18:24:59 09/17/17 (5)
I will have to look into that. Thanks for the tip. Want to stay on the cheap side for now as this is just an experiment.
- RE: good push pull 2A3 design schematic - Triode_Kingdom 05:47:21 09/18/17 (4)
  I'm sure you already know this, but the one significant advantage to PP DHT (Class A) is that you get the magic without the hum. If I had it to do over, I'd strongly consider building PP 211 instead of SET.
  
  --------------------------
  Buy Chinese. Bury freedom.
  - RE: good push pull 2A3 design schematic - vinnie2 07:02:06 09/18/17 (3)
    Hmmmmmmmm. Hadn't thought about that, but it sounds interesting. Best take a look at those before I get too far along. Know of any good designs/schematics? Would the same be true for PP 845? Same questions if so.
    
    Edits: 09/18/17
    - RE: good push pull 2A3 design schematic - Triode_Kingdom 08:11:18 09/18/17 (2)
      There are schematics for SE and PP DHTs at the Bonavolta Audio site (link below). As always, approach all online schematics with caution. Many are wannabe musings and have never been built or tested.
      
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      Buy Chinese. Bury freedom.
      Bonavolta Audio - Tube Amps (Open in New Window)
      Edits: 09/18/17
      - RE: good push pull 2A3 design schematic - vinnie2 09:44:16 09/18/17 (0)
        
        In Reply to: RE: good push pull 2A3 design schematic posted by Triode_Kingdom on September 18, 2017 at 08:11:18
        
        Looks like only one each for 211 nd 845. Guess I will have to do some surfing.
      - RE: good push pull 2A3 design schematic - vinnie2 09:25:32 09/18/17 (0)
        
        In Reply to: RE: good push pull 2A3 design schematic posted by Triode_Kingdom on September 18, 2017 at 08:11:18
        
        thanks

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