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In Reply to: RE: DO NOT DO THIS ON MAC AMPS ! posted by Michael Samra on July 03, 2016 at 20:01:36
Ah, we are on the same page.
I don't think "regulate" is the word you're after in "...doublers in the Mac and Cit 2 amps regulate very well..." since the voltage will still scale with line voltage. I recognize the quality added by low resistance windings.
Follow Ups:
I was speaking hypothetically when I said regulate but what I really mean is stability..Today's Mac tube amps like the reissue Mc275 doesn't use any form of regulation that we use in conventional circuitry.It essentially mirrors the original circuit. The reason behind that I would assume is the fact that the unity coupled circuit doesn't operate independently of the other elements in the circuit.It moves proportionally up or down with signal. In a conventional pentode connected output circuit, we can regulate G2 without regulating the plate voltage.
I am curious tho. I would love to see what would happen in a Mac amp if we did regulate the plate and or G2 just to see what would happen to operating conditions.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
I think you'd be ok if you regulated B+ AND C-, but not just one. Since G2 and the plates are connected, if you regulate one of them I think you'd drastic change the operation of the amp.
I believe you are right.I may give it a try as well.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
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