12AX7 Schmitt Phase Inverter circuit (PI)

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A 12AX7 Schmitt phase inverter aka Long tail pair in the audio world is breadboarded here. It works well at audio frequency but for radio frequency a 6922 vacuum tube should work much better.

This splitter/inverter is used to drive a push pull vacuum tube amp.

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From: Lablanc Engineering-two

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Philips EL6431 PA driven with Williamson Phase Inverter

I have not posted a video in ages, I think the last one was about 3 years ago, since then I have become much more knowledgeable but also more silly and overly confident....

So, here is an amp I have been working on for a number of years now.... and finally it seems that I have hit the sweet spot, with much troubleshooting I isolated an anonymous buzz to what I believe is an LTP(long tailed pair) inverter stage with grid ground, the solution, a near perfect symmetry Williamson phase...

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From: TheThermionicWarrior

Related topics : long tail pair phase inverter

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