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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: RE: red plates ... posted by kobasa@xs4all.nl on September 21, 2021 at 11:59:04:
ElBlanco (Thanks!" did us a favor and put up
Robert B. Tomer's "getting the most out
of vacuum tubes".
ElBlanco posted this Sept. 19 on this forum.
I read it all. You might enjoy Tomer's
discussion of fixed bias amps and the
history that led up to them.
Today, commercial fixed bias amps track vacuum
tube conduction individually, and automatically
correct bias to get equal idling currents.
Of course, in the case of unequal tubes (always),
the tubes are forced to idle at the same currents
by applying unequal grid bias. While this
arrangement allows the use of unequal tubes, and
also obtains more consistent power output, one must
also admit the truth:
When the incoming signal sees different bias on
supposedly "balanced" (current-balanced only), tubes, guess
what happens to your signal when it encounters
unequal grid bias on different tubes?
You guessed it: smeared music.
-Dennis-
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- RE: red plates ... - tube wrangler 09/21/2114:39:43 09/21/21 (2)
- RE: red plates ... - PakProtector 16:37:50 09/21/21 (1)
- RE: red plates ... - GEO 18:40:09 09/21/21 (0)
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