Anyone know lots about the electro harmonix polychorus?

[rosscocean]

I just got a polychorus and after having a look inside I have a couple of questions.

Does anyone know what the trim pots (labelled 1-8 on the pcb) are for?

If I switch the two wires around going to the power input will it work with a standard boss power supply?

Cheers Ross

[theehman]

I just got a polychorus and after having a look inside I have a couple of questions.

Does anyone know what the trim pots (labelled 1-8 on the pcb) are for?

Trim 1:  delay IC bias
Trim 2:  balance trim
Trim 3:  gain
Trim 4:  delay IC bias
Trim 5:  balance trim
Trim 6:  gain
Trim 7:  mix
Trim 8:  clock freq.

If I switch the two wires around going to the power input will it work with a standard boss power supply?

No.  It needs 24vdc, 100mA.

[ppatchmods]

positive tip

[rosscocean]

I just got a polychorus and after having a look inside I have a couple of questions.

Does anyone know what the trim pots (labelled 1-8 on the pcb) are for?

Trim 1:  delay IC bias
Trim 2:  balance trim
Trim 3:  gain
Trim 4:  delay IC bias
Trim 5:  balance trim
Trim 6:  gain
Trim 7:  mix
Trim 8:  clock freq.

If I switch the two wires around going to the power input will it work with a standard boss power supply?

No.  It needs 24vdc, 100mA.

cheers Ron

How would altering the trim pots affect the sound/performance? Also is the any way to extend the delay time?

I had a look at your ehx site. Good stuff!

Cheers Ross

[theehman]

I wouldn't bother the pots.  They're set at the factory for a specific performance.

[a soBer Newt]

would any of these being miss calibrated cause a polychorus volume to randomly drop out?

[theehman]

That sounds more like a bad solder joint somewhere.