Re: mic preamp modification

Joerg wrote:

> Hello Rex,
>
> FWIW, the 4052 is a dual 4:1 multiplexer. Sometimes also used to switch
> resistors in and out for gain control.

Erk ! Thinks *non linear resistance with applied voltage*.

> I don't know about this
> particular opamp but check it's data *** for noise performance.

It's actually quite good.

> If it is considerably worse than others a swap might help.

It won't.


> Anyways, you might want to print all the data sheets of the parts and
> draw a schematic to understand how it works.
>
> Phantom power sources can be a noise contributor but if so that could be
> filtered.

Damn well shouldn't be a noise source unless the designer was mentally
defective !

Graham

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