• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Tube literature on pentodes + transformers

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rtarbell

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Joined 2005
#1
Hi All,

Could someone recommend a good book on pentodes and the different configurations for gain stages? The most recent article in AudioXpress on a universal output transformer sparked my interest, but it shows so many ways of connecting the screen grid for feedback, I don't understand it all!

I'm just looking for a good book (above elementary level but not too complicated) explaining pentodes and transformer coupling to them.
 
#3
Jones's book is a must-have if you're trying to understand tube circuits. But a more comprehensive look at output stage connections and trade-offs can be found in Crowhurst's "Understanding Hifi Circuits," which I believe has been reprinted at AudioXpress.

Between these two books, you'll be an output stage maven.
 
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