Hoffman Amplifiers Tube Amplifier Forum
Other Stuff => Your other hobbies => Topic started by: Blueboozer on April 27, 2021, 10:30:46 pm
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I just invested a months pay in a 1940’s Sparton 7-46 PA ($60). My original intention was to steal it blind and see what kind of amp I could build with 2 6F6’s in push pull configuration and what I think are 7A7 pre’s (I can still do that and check out the tones). But after firing it up I think I might just restore it. It makes noises and all the tube filaments are lit. It has an old field coil equipped 10” speaker in it. So my question is, should I go with the current speaker or try to find an OT to match the 6F6’s and go with a more modern speaker?
I think I’m going to turn it into a twilight zone radio. Wire an audio source that plays big band and use it to puzzle the kids. “It’s stuck in WWII and only plays Big Band”
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Only you can answer those questions.
That's a particularly nasty "phase inverter".
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That's a particularly nasty "phase inverter".
I was assuming that was the function of the 7B6. Not what I’m used to seeing. Will take some noodling…
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:think1:
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Shows my ignorance. A phase inverterless push-pull amplifier.
I didn’t know there was such a critter.
Found this in the DIY forum - looks strikingly familiar
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I think I’m going to turn it into a twilight zone radio. Wire an audio source that plays big band and use it to puzzle the kids. “It’s stuck in WWII and only plays Big Band”
:l2: