Negative/Positive Ground Effects Chain Question

[john.hostetter]

So I've read several helpful posts dealing with the perils of using a daisy chained power supply with both positive and negative ground pedals. BUT when I analyzed my effects chain (after my grounding education) I realized I have been using a negative ground power supply with an EA trem (neg ground), a Fender tuner pedal (neg ground) and a Fuzz Face clone (POS GROUND!). Everything seems to be working fine. Is my effects chain a ticking bomb? Have I somehow worked a miracle? Thanks for your reply.

[potul]

Hi,

If pedals are working and nothing burned, your chain is most probably OK, and probably your Fuzz Face is not positive ground.
When daisy-chaining positive and negative ground effects, you're in fact shorting the power supply, so usually something burns.

Potul

[john.hostetter]

Cool, good to know. I'll look at it tonight and make sure it is negative ground. I built it from a BYOC kit but I could not find any indication of it's circuit ground. Thanks for your help!

[potul]

By looking at the schematic you can tell easily if it is negative or positive ground. Just check where the sleeve of input/output jack are connected. If they are connected to +9v , it is positive ground. If they are connected to 0v, it is negative ground.