Quattrocose 1967_02.pdf- (1.41 MiB) Downloaded 153 times
60W EL34 tube amp, in: Quattrocose, February 1967 🇮🇹
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modman
- a d m i n
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ppluis0
- Diode Debunker
For the young people here at the forum, the first picture is equivalent to a solid state veroboard 
For the elder members:
it's strange that inside a feedback loop (from output transformer to a third amplifier stage) the designer incorporate a Baxandall tone control...
What do you think ?
Cheers,
Jose
For the elder members:
it's strange that inside a feedback loop (from output transformer to a third amplifier stage) the designer incorporate a Baxandall tone control...
What do you think ?
Cheers,
Jose
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bmxguitarsbmx
- Cap Cooler
Good eye Jose. That is strange to have an eq inside the feedback loop. Modifing the frequency response of the open-loop gain that then the feedback loop will try to correct seems suspect. My guess is it would cause user confusion. On the other hand, if you wanted less error correction in the top end and more error correction in the low end (or vis versa) it may be useful? Extra Phase shifts inside a feedback loop is another potential problem though too.
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Manfred
- Tube Twister
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Great, i love these wiring diagrams, wiring meets art. 