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MY TINY PRE-AMP

post #1 of 7
10/18/08 at 6:35am
Thread Starter 
GAIN:3-5X
POWER SUPPLY:+/-12V
ALPS POT WITH MOTO:100KA









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post #2 of 7
10/18/08 at 7:36am
Sorry for double posting. A cat walked over the keyboard.
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post #3 of 7
10/18/08 at 7:44am
Nice work. Why make it more complicated than you have to. With the right opamp, power section and grounding, this will sound as good as any 1 000 $ high end amp. Some opamps might need a small cap in parallel with R3/R4, and some might sound better with a resistor in series with the output. 1 k input resistor might be a little high, but I doubt you'll hear much difference. If high speed opamps are used, small ceramic caps from as close to the opamps power pins to ground might be needed.
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post #4 of 7
10/18/08 at 8:53am
Thread Starter 
hi nelson
you can put small caps on the R3R4 directly if needed ,because it is a tiny pcb.
also power small caps.
1k consists of LPF with the small cap behind it.
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post #5 of 7
10/18/08 at 10:27am
It's a cmoy.
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post #6 of 7
10/18/08 at 5:26pm
Cmoy with LPF and motorized ALPS
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post #7 of 7
10/1/09 at 9:22pm
Thread Starter 
hi
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