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Eeyore Eeyore is offline
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Default Low Frequency Mains Noise



Phil Allison wrote:

"Eeysore the Congenital LIAR "
Ian Bell wrote:

Yes, that's my other problem. The simple CC cascade pair with NFB I am
using has a very poor PSRR.


Not a problem with solid state you see.

PSRRs are typically in the 120dB region.


** Really?

On what planet is that ???

TL071 = 86 dB typ

NE5532 = 100 dB typ.


Both 30+ years old designs.

http://www.national.com/pf/LM/LM4562.html

" PSRR and CMRR exceed 120dB (typ) "

Graham