Glad to help - the X100 is an amazing piece of digitally-controlled analog circuitry, particularly in view of the time it was designed and built. I have heard a couple, and they can produce some really GREAT electric guitar tones.
Yazoo55 said:
Would it be worth trying J201s? I have a few of these in stock.
Nope. The Vpinchoff for the J201 is very low. Not suitable for voltage-variable resistor service. It's also a short channel device.
Measure the pinchoff voltage for the 2N4339 you've got, and we can get some idea of how likely it is to be workable.
Yazoo55 said:
I am getting too much compression despite adding a potentiometer to try to control it better.
Can you describe, or better, post a SOUND CLIP of the way the compressor sounds NOW?
And please post the SCHEMATIC of how you have it hooked up now. It doesn't have to b e pretty.
I have the schematic for the SRD Sustainor, which I believe is the same or very similar to the X100, and the schematic for the original SRD Rockman, but neither of them use a potentiometer or a trimpot to adjust the compressor. You mentioned that you added a pot, but where in the circuit you added it isn't clear to me. It would be very helpful to be able to see what your EXACT circuit is, and it would be much easier to discuss here if we all were referring to the same schematic and parts' designations.
mr coffee