It was designed by bob bednarz and it was the first phase shifter to employ feedback in the circuitry.
Bad stone phaser schematic.
This demo includes a brief interview with ehx founder mike matthews talking about phase shifting.
The guitologist 41 224 views.
Watch the incredibly soulful sounding bad stone in action.
It compasses 6 stages of phases shifting with variable feedback.
The bad stone phase shifter made history as the first six stage phaser with an adjustable feedback control and a manual mode that actually lets you freeze the phase sweep.
The correct value is 100r and not 100k so the value in the value in the vero is correct 2.
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Regarding my previous comments after i tested the values of the two schematics.
The russians rigged this guitar pedal electro harmonix sovtek small stone phaser reissue repair duration.
2015 03 19 electro harmonix small stone phaser demo by alex t 2015 05 12 electro harmonix v 4 small stone phaser w soaringtortoise electronics pedal less expressor mod by soaringtortoise 2015 09 06 electro harmonix small stone v1 by phosphene audio 2015 12 05 vintage electro harmonix small stone phase shifter by tokiony.
Again this vero is correct 3.
Same holds for the 56k of the original schematic that is replaced with a short here.