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Eeyore Eeyore is offline
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Default Low Frequency Mains Noise



Ian Bell wrote:

Eeyore wrote:
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.


Only if you use op amps.


Well who wouldn't ?


The dc coupled triple typical of the Neve class
A preamps is just as bad as its tubed version.


Except they did at least have regulated power supplies !

Graham