Originally Posted by Charlie Fogle
Single supply voltage, hi-gain op amps have been a mainstay in surveillance circuits since the 70's/80's. Here's an example.
They have and many are very good performers, but they would need to be used with 48V phantom feed, which does add a hurdle. It can most certainly be done, but they need a voltage regulator. Quite a few will go a below rail on the input and rail-to-rail on the output, so input biassing can be a minimal issue. I think one can draw up to 5mA milliamps, which is likely more than enough as many such OpAmps draw only microAmps. A simple low-quiescent regulator is probably OK, though again 48V might be a bit of a challenge. Driving a 2k2 load might also prove a bit of a challenge. These things should all be do-able enough, though. Whether it's the best way in another matter.

Originally Posted by justanoldmuso
i like it and it doesnt give me any hassle....lol.
Which is what matters.

Jazz relative beginner, starting at a much older age than was helpful.
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