Is LM324 low noise though? The advantage is that this IC has no phase inversion, will there be a disadvantage when replacing it for the TL074?
hi t.
As 'agu' points out, the two opa's are pin compatable, it would be a simple test just to plug in the LM324 and try it.
If you don't, the TL074 is not going to get the job done anyway.
Is the voltage divider R6/7 = 3K3 and 330uF ?