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, the basic
configuration is crude, problematic, lacks precision, and operator
tuning significantly alters operating characteristic. Then the one
component with well-matched differential components is underutilized.