Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Misc Schematics and Layouts => Topic started by: John on August 11, 2011, 03:23:38 pm
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Hi fellas, I drew up a test for myself. This is just to help me get a better grip of what I'm looking at and understanding the circuit better. The basics came, of course, from the HoSo (that I absolutely love even though mine doesn't have the switching), but I inserted a simpler, 1-knob tone section. Not all values are entered, nor is the power supply itself drawn out, because I was starting to go cross eyed. I drew this on Jschem. I drew the 12ax7 tubes differently, because it gave me a more mental picture of how I'd be wiring it, but I know everyone uses the "half tube" style.
Anyway, please point out errors I've made, along with any suggestions as " you should have done this" or "this is the standard for drawing schems", anything like that. And thanks in advance for taking the time!
John
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Looks pretty good. But, I notice a couple problems...
1. V2-8 has a high dc voltage on it. You will want a cap to block that dc from getting on the tone stack pots.
2. The output tube control grids need a path to ground. You probably forgot to draw a ground symbol at the junction of the MV pots?
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Sluckey, thanks! Yes, I forgot the ground symbol, but showed my ignorance with the non cap at V2. That's why we should always find a known-good circuit, and plagiarize. :grin: