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#1 Phaser

Posted: Mon Aug 09, 2021 6:41 pm
by andrew Ivimey
Back in the day, say 1972, I built a couple of phaser pedals.

Two transistor (stage, notch filters) a foot pedal controlling a dual pot.... it was a good few years later when working for Electro Harmonix that I found that operational transcondomethings did the job but they originally used fets... anyway.... the circuit I'm talking about was almost deffo Practical Electronics, maybe ooooo Elektor or Wireless World.

Yer foot did the whoosh, and what a whoosh it was.

I'd love to find the circuit but I've tried - oh dear -

Anybody out there??? Help

#2 Re: Phaser

Posted: Mon Aug 09, 2021 6:45 pm
by andrew Ivimey
P.s. I've had lots of fun with one transistor, two transistor three potato four fuzz boxes during lock down but handed over to Keeley finally but I'd dearly like to knock up that old phaser.

#3 Re: Phaser

Posted: Mon Aug 09, 2021 6:57 pm
by Nick
I remember that circuit (but cant remember it IYSWIM), all the ones I can find are op amp based.

#4 Re: Phaser

Posted: Mon Aug 09, 2021 7:02 pm
by andrew Ivimey
Thanks for that - thought I was derrreamin'.

But surely there's a record if it somewhere!?

#5 Re: Phaser

Posted: Mon Aug 09, 2021 9:42 pm
by Nick
It was similar to this.

Image

#6 Re: Phaser

Posted: Mon Aug 09, 2021 9:47 pm
by andrew Ivimey
Yes something but it used npn transistors.