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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: Ok, I'm going to ask this cap question here because I can't seem to get an answer posted by airtime on April 4, 2016 at 06:57:40:
Charlie
If the cap is in the nested feedback loop,you can make the amp become unstable because the cap values were calculated into the equation for the operating parameters of a particular transistor and you can change the time constant throwing off that section of the amp.
If it's just coupling the input to the base of the first transistor,you probably won't notice it as you may have just lowered the corner frequency at the pole.Like Steve said, we really need a schematic and whether or not this is an integrated amp or just a power amp,basically I can tell you that if it's in the nested loop or global NFB loop,changing values will make the amp become unstable. SS amps typically are not as forgiving as tube amps when altering cap values in the signal path.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
Edits: 04/04/16
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Follow Ups
- RE: Ok, I'm going to ask this cap question here because I can't seem to get an answer - Michael Samra 09:18:17 04/04/16 (4)
- RE: Ok, I'm going to ask this cap question here because I can't seem to get an answer - airtime 16:17:25 04/04/16 (3)
- RE: Ok, I'm going to ask this cap question here because I can't seem to get an answer - Lew 12:33:46 04/08/16 (0)
- RE: Ok, I'm going to ask this cap question here because I can't seem to get an answer - Michael Samra 18:12:51 04/04/16 (1)
- 22uf replaced with 100uf - airtime 10:54:12 04/06/16 (0)
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