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RE: Power amplifier

>>As every people advise me to build an NFB amp so why not build one amp with tons of NFB (something like in Peter Baxandall papers says 40 dB).<<

LARGE amounts of NFB that include the O/P trafo in the loop make the amp highly vulnerable to both O/P trafo core core saturation and slew limiting. :>( Think of the GARGANTUAN error correction signals involved at both frequency extremes.

What you want to use is cicuitry that's reasonably linear open loop. Then, a few dB. of loop NFB will improve damping factor and linearize your questionable Chinese O/P trafos. NFB is a tool that can easily be abused.

Eli D.


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  • RE: Power amplifier - Eli Duttman 15:11:42 11/03/07 (1)

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