mxr phase 90 mods

Started by POTL, September 01, 2017, 10:09:01 AM

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POTL

Hello
Please share schemes in fashion
1) 90 to 45
2) Vibe (univibe)
3) Script
How can 1 and 3 be combined together, as in m95?
I watched in Google, but the schemes are different, I want a proven option.
Thank you

Suicufnoc

Script mod changes the feedback amount, phase 45 has no feedback, so they can't be combined/already are.
Sticks and stones may break your bones, but words can get you shot

Mark Hammer

Script and block also differ in the width of the sweep from the LFO.  Or at least the current-limiting resistor that sets sweep width is different: 3M3 vs 3M9 (3M3 gets a wider sweep)

One issue has a wider sweep with a bit more feedback, which is more suitable for slow sweeps.  The other has less feedback and narrower sweep, which is more suitable for faster, bubbly sweeps.

The P45 has a network around each FET that reduces susceptibility to distortion from the FET.  The P90 does not.

I'm not saying that the P95 does not come close to the various original units and issues, or that it doesn't sound great, but those little push-buttons are only DPDT and also engage status LEDs, so I have my doubts as to the completeness of the "conversions" achieved when the buttons are pushed.