MXR auto phaser schematic

[Tubetec]

I always liked the sound of the MXR phase 90 but it lacks the extra controls to make it more versatile.

 

[CJ]

no on/off LED either.

 

[Johnny1234]

Here is a print of the auto phaser with the part numbers and values drawn in.

some were hard to read, they are the ones with the red print, if anybody can figure out those guys then that would be great!

View attachment 101712

C-18 4.7 uf

 

[CJ]

Thanks Johnny!

 

[Tubetec]

The Phase 90 does the Lesilie rotor Doppler effect very nicely ', think darkside of the moon
its very much a mono effect that makes it seem like the sound source is moving towards and away ,
Sprinkle on a little stereo chorus left and right with the independant delay times and it starts to sound like The Floyd live at Pompei .

 

[CJ]

This lovetone doppelganger does Floyd pretty good. Need the belerec dang it,
Go Argentina!

 

[KA-Electonics.com]

Would anyone be interested in a VCA-based phaser?
I built an 8 pole with THAT2180s.
Much quieter than FETs and easier to source than Vactrols.

The allpass section looks like this:

There are some sample sound files in this thread: A VCA-Based Phaser - Pro Audio Design Forum

 

[Iliketurtles]

Does anybody know what albums this appeared on?

 

[Iliketurtles]

I have a few mothballed, can’t wait to rack them, hope this thread continues