posted
Variable gain? No need. A simple transistor amplifier will do the trick. The input stage is a current amplifier.
As for adjusting the feedback loop. Usually it's not a problem until it start oscillating in the higher frequencies. So, too much feedback can cause your amp to fry. Not enough and you'll have above average distortion. Ah, compromises.
Posts: 768 | From: Ottawa, On, Canada | Registered: May 2000
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posted
Emu- douglas self has a pretty good approach to applying just the right amount of negative feedback and supressing destructive oscillations.. You might want to check out his book, its not too pricey.
ShadowStar
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Posts: 2578 | From: Somewhere In the Northeast | Registered: May 1999
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posted
Voltage follower into that circuit, but on decent amps the RCA shield is taken as the zero reference not the chassis ground. This prevents ground loop noise.
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posted
Thanks for the link. I have Slone's book, high-power audio amplifier construction manual. I think I'll get Self's book eventually. I want to build a 100% local feedback CF design first. Then I'll get seriously into amp design.
Posts: 768 | From: Ottawa, On, Canada | Registered: May 2000
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