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Agree, especially given that it's designed for use with a single supply....
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Unless I'm missing something, the diagram has to have an error. With the "blocking" diode in front of the LED, I don't see how there could ever...
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Surely understood here by most, but just to add to the discussion: There is an inference by some around the interwebs that PT construction has an effect on...
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I believe it's a gain stage with gain of 1 and the minus means inverting. So, basically it's an inverter in this case.
Edit: You are basically...Last edited by The Dude; 04-19-2024, 01:34 AM.
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It's what manufacturers call class A these days, even though technically not.
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If there is real mojo created by different PT's, results should be measurable. Sag can be calculated by measuring B+ at different output levels. IMO, mojo...
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I love the project, but admittedly, most of your description is gobbledygook to me. I'm just a lowly tech with zero design experience in this sort of thing....
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I really can't take credit for the design. It's been around for quite some time. IMO, adding that resistor is just a quick and easy way to "fix"...Last edited by The Dude; 04-17-2024, 10:24 PM.
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The original bias circuit had 51K total resistance to ground from the rectifier. I would think anything at or above that would be safe. Your drawing has...
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FWIW: Check drivers first. I had one recently doing the same thing. The LF driver measured .7Ω (shorted voice coil). Surprisingly, the unit still worked...Last edited by The Dude; 04-17-2024, 12:06 AM.
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Apologies to the OP for turning this into story time, but I have another that Chuck's reminded me of. This is second hand, but came to me from a good friend...
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The better part of the story is the '66 BF Princeton. The owner took it to a store (won't mention the store name to protect the guilty) to sell. It had some...
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