AMZ FX ANALOG ALCHEMY GEOFX MEF ROG MEF DIY WIKI

Circuit diagram for Ibanez PH99 Phaser anyone?

Started by StephenGiles, October 30, 2008, 04:25:16 PM

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StephenGiles

October 30, 2008, 04:25:16 PM
A friend of mine in England asked me for this, which I have never seen. Can anyone let me have a copy please?
"I want my meat burned, like St Joan. Bring me pickles and vicious mustards to pierce the tongue like Cardigan's Lancers.".

StephenGiles

#1
October 31, 2008, 06:57:34 AM
This seems to be a rare one then!
"I want my meat burned, like St Joan. Bring me pickles and vicious mustards to pierce the tongue like Cardigan's Lancers.".

skiraly017

#2
October 31, 2008, 09:45:31 AM
PM'd
"Why do things that happen to stupid people keep happening to me?" - Homer Simpson

StephenGiles

#4
November 01, 2008, 08:10:19 AM
Many thanks, that's a very nice drawing by Dirk there. has anybody noticed the 2 static phase shift stages and............a compander!!
"I want my meat burned, like St Joan. Bring me pickles and vicious mustards to pierce the tongue like Cardigan's Lancers.".

Mark Hammer

#5
November 02, 2008, 07:28:58 PM
The use of two fixed allpass stages is reminiscent of the MXR Phase 100, which uses 4 of them.  Interesting that the "intense" switch essentially selects between 2-fixed/two-swept and 2-fixed/4-swept.

The other thing that is not all that radically clever, but still something very useful that can be applied to many things using feedback, is the positive/negative feedback stage built around IC6B.  It is simply an inverting op-amp, with a pan-pot connected to its input and output signals.  In the middle position, it combines an inverted and non-inverted copy of the phase-shift signal such that they cancel each other out and result in no feedback.  Moved in either direction you get progressively more positive OR negative feedback from the same pot.
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