On Wed, Apr 23, 2014 at 7:21 PM, <allgyer@...> wrote:
Well that was disappointing.......
Instead of paralleling a second 10 ohm resister across each of R30 and R31, I went for broke and simply bridged them out of the circuit.
Try changing R32 and R33 to 10k instead. You can leave C23 and C24 off for testing.
By doubling the feedback resistors you are halving any OpAmp noise that loops back into V-. If this doesn't help then ? I'd guess you hit a limit due to common mode noise.
