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Local NFB in preamp
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Aleksander Niemand
Zagray! amp- PG review Aug 2011
Without the freedom to criticize, there is no true praise. -Pierre Beaumarchais, playwright (1732-1799)
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random guess?
Positive? Be nice, please!
Not on the same level as some of y'all...
Justin"Wow it's red! That doesn't look like the standard Marshall red. It's more like hooker lipstick/clown nose/poodle pecker red." - Chuck H. -
"Of course that means playing **LOUD** , best but useless solution to modern sissy snowflake players." - J.M. Fahey -
"All I ever managed to do with that amp was... kill small rodents within a 50 yard radius of my practice building." - Tone Meister -
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Gents,
It's a form of multiple negative feedback (ok, I had to look it up, not being as sharp as some of the brainiacs here), the topology is thoroughly discussed in RDH4 (p. 334-336), I even found an old correspondence from Duerdoth (who was referenced by Langford Smith in the analysis). As Teemuk has already noted, the circuit can only be considered conditionally stable, and why one would use it in a plain old guitar amplifier stage is amusing...
Jaz
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