i need schematic for a phaser maestro...thanks

[bioark]

I need it for a repair
thanks!!!

[RickL]

Which one? Mark Hammer has schematics for a couple of them on his page (look in links to find his site). The stage phasers (the ones with the big wheels) aren't there I don't think but I have seen them on line. It might be a long search but if they're still available you should be able to find them.

Rick

[StephenGiles]

Here
http://www.dredgetone.com/Schematics/
Stephen

[Chill]

Hey, thanks for the schemo for the maestro phaser.  Did I read that correctly, it's a 5 stage phaser?

And to make it a bit louder to correct for the volume losses, would I increase R5, decrease R4, and/ or decrease R37?

[Mark Hammer]

Hey, thanks for the schemo for the maestro phaser.  Did I read that correctly, it's a 5 stage phaser?

Yes and no.  There are 5 CA3094-based swept phase shift stages and one fixed allpass stage (IC7B) from a half of a TL022 dual bifet.

Fixed stages add more phase shift on top of what gets produced from the swept portion, and adding fixed stages is a relatively common "trick" once you get past the typical 4-stager.  For instance, one of the Ross Phasers uses a fixed 5th stage in the regen loop, and the MXR Phase 100 uses 2 fixed before the six photocell-swept ones and 2 after to get a total of 10 stages of phase shift.  From the phase shifter's perspective, it doesn't really "care" where the phase shift comes from.  It just adds up all the degrees of shift across the relevant stages, and produces the extent of notch that X amount of cumulative phase shift dictates.

[Zero the hero]

I found the Fuzzstain very interesting: nice compression circuitry!

[Chill]

Hey, thanks for the schemo for the maestro phaser.  Did I read that correctly, it's a 5 stage phaser?

Yes and no.  There are 5 CA3094-based swept phase shift stages and one fixed allpass stage (IC7B) from a half of a TL022 dual bifet.

Thanks!  That last stage looks virtually identical to one of the phase stages in RG's technology of phasers article.