Corby,
Thanks for the information. I was not aware of the relocated resistor.
Yes, it is the DC feed-throughs.
Any thaughts on a possible replacement for OPA111?
I have also duplicated the revised A7 AC-Amplifier boardusing film capacitors
for the notch filters and modernOP-Amps. Since I have one old A7 board as
spare, I caneasily compare the performance.
BR
Ulf Kylenfall - SM6GXV
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