Roland - AP-7 Jet Phaser [schematic]

[RWalleyTX]

Updates?

[nechelovechek]

Hi. Greetings from Russia. Its a great forum you have there.
I've tried to build that phaser for a long time. It works now somehow, but the output of the effect is very low. Amplitude of the output is 4 times smaller then input. What might be tweaked to make it sound louder? I've used shematics in the attachment.

[Fender3D]

Hi and welcome to the forum,

you're asking what to tweak to make it sound louder.... well actually, the phaser part has a low input impedance, then, if you're connecting it to a high impedance source, like guitar or bass, it should "dull" your sound with a slight volume loss. I'd add a small buffer (just a FET or BJT stage) in front of it.

IC3b and IC1d have a gain ~3 which should recover any loss in the passive output mixer...
So I would say: there's nothing to tweak... check for resistors values, solder joints or eventual short or track cut (assuming your PCB is correct...)