PNP and NPN on the same power strip?

[superferrite]

I'm powering most of my pedals with a Godlyke Powerall, but my fuzzes (a PNP Easyface and a PNP Ge Fuzzrite) are battery powered. 
Now that I'm working up a pedal board, can I install jacks on the fuzzes and plug them into the same power strip with a different wall wart?
I've heard about lots of noise and polarity problems and I'm not really sure how to proceed.

Thanks!

[John Lyons]

As long as you use dedicated PNP/pos ground power supplies for those
that need it then you're fine.

[R.G.]

The noise and polarity problems happen when people try to fake reversing power and ground. Using a second power supply for the PNP/positive ground stuff produces reliable good results if all else is equal. At most you need two power supplies, one for negative ground, and one for the few positive ground pedals.

[superferrite]

Cool, that's what I surmised.
Thanks guys!

[Joe Hart]

can I install jacks on the fuzzes and plug them into the same power strip with a different wall wart?

I think I understand that the dedicated positive ground power supplies and dedicated negative ground power supplies are the wall warts, but I just want to make sure I do actually understand. So the answer to the original question is "yes," correct? I mean, plugging them into a power strip is essentially the same as plugging them directly into the wall (as far as ground is concerned). I've never used a positive ground pedal with an adapter before, but I find it hard to believe that plugging one into an outlet (be it wall or power strip) would shut down my side of town.

Now that I think about it, could I wire a power jack up as positive ground and just use a plain old BOSS adapter AS LONG AS I ONLY POWER THIS ONE PEDAL WITH IT?

Thanks.
-Joe Hart

[R.G.]

can I install jacks on the fuzzes and plug them into the same power strip with a different wall wart?

I think I understand that the dedicated positive ground power supplies and dedicated negative ground power supplies are the wall warts, but I just want to make sure I do actually understand. So the answer to the original question is "yes," correct?

The correct answer to *that part of* the original question is yes. You may freely connect *the primary side of two separate, isolated-output power supplies* to the same wall plug or power strip.

I mean, plugging them into a power strip is essentially the same as plugging them directly into the wall (as far as ground is concerned). I've never used a positive ground pedal with an adapter before, but I find it hard to believe that plugging one into an outlet (be it wall or power strip) would shut down my side of town.

That is correct - as long as the low voltage outputs are isolated, where the primary AC power sides are plugged will not be a problem. [Note to tech reviewers: yes, there are situations where connection to different branches of the AC power line or different outlets with different neutral voltages can cause some hum. That's not the same thing or pertinent to this question.]

Now that I think about it, could I wire a power jack up as positive ground and just use a plain old BOSS adapter AS LONG AS I ONLY POWER THIS ONE PEDAL WITH IT?

Yes. In fact, you may power any number of positive ground pedals up to that adapter, up to the limit of the power adapter. Two power/wall wart adapters is sufficient for any situation of positive ground and negative ground pedals, as long as you put only negative ground pedals on one adapter, only positive ground pedals on the other adapter, and arrange the + and - of each adapter so that each pedal gets the polarity it needs from its adapter. The separation into only negative ground on one adapter, only positive ground on the other adapter removes the issues with connecting signal ground on all pedals, and they'll all work together nicely. It's like the refrain of "I'd like to give the world a hug, and teach it songs and stuff... da-da, da-da, da-da-da-da..."

[Joe Hart]

Crystal clear! Thank you!!!
-Joe Hart

[pinkjimiphoton]

awesome, r.g.
i was gonna ask the same question today, glad i took a peek first!!

i got plastic 2.1mm power jacks, so i figured i'd wire up my one postive ground pedal, a pnp ge fuzzface backwards to the power supply jack, and run it with it's own wart.

now i won't worry about it.

thanks !!

[Joe Hart]

awesome, r.g.

R.G. is awesome. Someday when I'm rich and famous, I'm going to buy him a greeting card to that effect. ;-)
-Joe Hart

[R.G.]

Well, I'm a firm believer in the maxim that if you have to choose skill or luck, choose luck.