how can i make this potentiometer swipe at some freq. it only permits 0 to 100% or 0 to 50% etc...
should i replace VARIAC with some current dependent voltage source.
I posted my schematic in post #10 just for you
The potentiometer can be stepped from 0.01 thru 99.9 of its value in steps of 0.001 if required.!
I saw the diagram in post #10.
My best advise is too put the 741 OPA away in the cupboard and buy a low cost modern OPA. say a TL072 or CD3140