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Centre positive/Centre Negative?
Posted: Thu Mar 08, 2007 11:49 am
by ekwatts
What's that all about, then? Can I power centre pos and centre neg pedals off the same power pack?
Posted: Thu Mar 08, 2007 11:50 am
by Mike
Yes. but you need the right adaptor for the right pedal. Most pedals have boss-style 2.1mm centre negative supplies. Look at the sticker/manual for each pedal.
The voltage and current is the same the DC is just applied to the reverse parts of the jack between the two modes.
Going to make any more threads about your sodding Power supply?
Posted: Thu Mar 08, 2007 1:02 pm
by Doog
I'd imagine your powersupply has a few of those adaptor thingies for reverse polarity pedals.
Posted: Thu Mar 08, 2007 1:29 pm
by euan
What Mike said. If you get it wrong you'll notice sparks. Or at least I did when I made my FL301 DC power bodge.
Posted: Thu Mar 08, 2007 1:31 pm
by Mike
Doog wrote:I'd imagine your powersupply has a few of those adaptor thingies for reverse polarity pedals.
I imagine that's why he made the thread.
Posted: Thu Mar 08, 2007 1:39 pm
by Doog
Wouldn't the inclusion of both polarity jack convertors with his unit be obvious enough?
Posted: Thu Mar 08, 2007 1:42 pm
by Mike
Ask Eric. I'm thinking not.
Posted: Thu Mar 08, 2007 1:55 pm
by Mike
or at least I'm thinking he saw centre negative and positive, thought "What happen?" and didn't know which to use for his peds.
Posted: Thu Mar 08, 2007 3:17 pm
by ultratwin
I was happy to find that a good chop-n-flip of a simple DC cable allowed me to run my positive-tipped Maxon AD-900 and Blue Box off of the Voodoo Lab PP2...The one the huge brick came with got lost early on.
Posted: Thu Mar 08, 2007 3:21 pm
by Mike
Exactly, it's just which part of the jack plug is connected to +9V and which is ground. You can reverse them on the cable at any point to achieve the correct polarity.
Posted: Thu Mar 08, 2007 4:11 pm
by dots
is this anything like the ground switch on the back of my bassman? it doesn't just go on/off. it has 1/2/off. wtf?
Posted: Thu Mar 08, 2007 4:14 pm
by Mike
Don't touch that.
It's a ground lift. Ungrounding tube amps = dangerous.
Posted: Thu Mar 08, 2007 4:23 pm
by dots
but which setting do i put it on? if it were a matter of on/off, that would be swell. . .
Posted: Thu Mar 08, 2007 4:30 pm
by Mike
I would set it to 1.
I couldn't find more information I'm afraid. LDC would be worth a PM, he's a fender amp expert. Him and filtercap.
Posted: Thu Mar 08, 2007 4:50 pm
by dots
right-o. thanks for the help!
Posted: Thu Mar 08, 2007 10:58 pm
by ekwatts
Right... ok, well, my Adrenalinn is centre positive, while the rest of my peds are centre negative. So I'd use the red convertor with the Linn? It's tip positive/barrel negative.
I just got confused with the tip vs. centre etc difference in descriptions, and didn't want to plug anything in before I knew in case it exploded MY FACE OFF.
Gosh, it's exciting being able to power all my pedals from one power supply!