Polarity of various pedals

[Mexxx]

Hey guys!
I have built the following pedals:

EHX Big Muff Pi, MXR Microamp, EHX Envelope Filter, Ross Comp and the Rebote Delay 2.5.

The problem is - I do not know what polarity are they. It is different with the pedals I bought, like the Boss ones, which say that they are reverse polarity. But how do I know whether the person, who made the schematic changed the polarity, when drawing the schematics? I built them all according to tonepad.com layouts.

[midwayfair]

Why would someone change the polarity in the schematic? People don't do stuff like that except by rare accident (and then usually they fix it because a lot of people tell them it's a serious problem).

Anyway, you can determine the polarity of any effect by looking at which way the polarized caps and diodes face, and what channel (N- or P-) the other semiconductors in the circuit have. Look in the power section particularly -- there will be a big electro (47 or 100 uF) and usually a diode.

Most guitar effects that are positive ground are fuzzes with all PNP transistors. (There are several that use an NPN and a PNP and they are typically negative ground.) Almost everything else is negative ground.

Edit: Actually, I may have said something stupid here. Are you talking about phase inversion of the audio path, or power supply polarity?

[Kesh]

Do you mean polarity of the DC power jack? That almost always follows the Boss convention (not sure they invented it though) with negative centre pin, and the positive is almost always insulated from the case too, so use plastic sockets.

[Mark Hammer]

Perhaps you mean the phase of the output signal?  That is, whether the output is in phase with the input signal, or out of phase?

[midwayfair]

Perhaps you mean the phase of the output signal?  That is, whether the output is in phase with the input signal, or out of phase?

If it's this, there's MASSIVE thread on The Gear Page that lists nearly every stompbox with phase reversal.

[Mexxx]

Sorry for not replying so long, I didn't have any internet available.

I mean the polarity of the dc jack.