[Sander deWaal]

Eeyore said:


That could only be possible, if the feedback resistor from the base of
the inverting input of the differential pair is connected to ground
with a cap.
IMO, that's not a harmful place ;-)


It's potentially as equally harmful as the input cap actually.


I disagree.
The signal amplitude at the inverting input is attenuated by the
feedback voltage divider, and there's a fairly constant DC offset
voltage across it.

The input cap has to deal with an unknown DC polarity at the input and
higher signal voltages, hence the need for a relatively large value
and a bipolar electrolytic.
I use Nichicon Muse ES caps for this application.


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