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N. Williams & J Leo, Organ Tremulant Vibrato Phaser, Electronics Australia, March 1969 🇦🇺
Posted: 14 Jan 2021, 18:26
by modman
Full hi-res article in PDF:
Re: N. Williams & J Leo, Organ Tremulant Vibrato Phaser, Electronics Australia, March 1969 🇦🇺
Posted: 10 May 2022, 17:50
by BMS1971
I did try it but not really working... Needed to boost signal at input and oscillation is really not stable...
"Eddit", wen I added the 4 missing resistors, work like a charm, not the most powerful phaser vibrato but very pleasant. I had great results with NSL32 optocouplers. but I will try LED/LDR tomorrow again, I tried some today but background noise was BIG...
Re: N. Williams & J Leo, Organ Tremulant Vibrato Phaser, Electronics Australia, March 1969 🇦🇺
Posted: 11 May 2022, 18:42
by BMS1971
Eddit, the only problem I'm facing is that to have enough electricity to fully run the leds, the darlinton pair for the leds overheat...
Re: N. Williams & J Leo, Organ Tremulant Vibrato Phaser, Electronics Australia, March 1969 🇦🇺
Posted: 14 Jun 2022, 10:20
by BMS1971
Update on built:
1 the best is to use only one lamp for all 3 LDRs à la Univibe.
2 USE trimpot in series with resistor (82R) on darlington who drives lamp effect is very sensitive to lamp brightness
3 40408 can be replaced by BC141
4 I used BC108B from CDIL
Re: N. Williams & J Leo, Organ Tremulant Vibrato Phaser, Electronics Australia, March 1969 🇦🇺
Posted: 30 Nov 2022, 15:09
by BMS1971
Last Update
Added a 4th stage (cloned T3/T4 or T5/T6 stage). Much better definition in sound. Now sounds amazing. Used LDRs 30K/5M from Musikding
Benoit
Phase Vibrato Phaser Electronics Australia March 1969.pdf