Phase90 trimpot setting

temol

Well-known member
I'm curious how do you set the trimpot in your Phase90 clones. Trimpot affects depth and the way signal is modulated. What setting do you prefer? Deepest possible? A little bit nasal? Subtle?

Here's the trimpot in action in my build. First clockwise, then counterclockwise. From zero effect to max, back to zero. And the same but in opposite rotation direction.

And here - the same LFO speed, two sets of jfets - MMBF5457 and MMBFJ201.
 
Here's the trimpot in action in my build. First clockwise, then counterclockwise. From zero effect to max, back to zero. And the same but in opposite rotation direction.

And here - the same LFO speed, two sets of jfets - MMBF5457 and MMBFJ201.
On the first clip, my favorite setting was the deepest one for sure, when the effect was the most pronounced and you could hear the shift very clearly.

On the second clip, I liked the MMBF5457 a lot better!
 
Another sound sample. Each set of transistors requires new trimmer setting, so it's hard to get similar phasing pattern for each sample. And with regular trimpot it's only small fraction of rotation to change setting or completly cancel phasing. Would be easier with multi turn trimmer.

This time
MMBF5457
MMBFJ201
J201 (fake, TO-92, with Vp around 1.4V)
J201 (fake, TO-92 with Vp around 1.8V)
2N5485 (or whas it 5458...?)
MPF102
 
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