Fred Bloggs wrote:

Eeyore wrote:
Genome wrote:

On the basis of the above analysis..... the gain is going to vary all over
the shop as Bnpn (and other stuff) varies. So yes it is crap.

WRONG !

Every serious pro-audio mixer has a mic pre-amp circuit that's not a heck of a
lot different to this since the late 1970s.

It performs really rather well. Has no-one yet considered simulating it ?

Not really concerned with assessment of basic performance,

Why not ?


the basic configuration is crude, problematic, lacks precision, and operator
tuning

Tuning ?


significantly alters operating characteristic. Then the one component with
well-matched differential components is underutilized.

So Mr Expert. Design a better one.

I'm waiting with bated breath.

Graham