Power adapter for UDG

The Rockman stomp boxes, including the Ultimatum Distortion Generator and Acoustic Guitar Pedal.
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darthoverdrive
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Power adapter for UDG

Post by darthoverdrive » Sun Aug 24, 2014 2:16 pm

I have been fortunate to come across a UDG. It works great with two 9 volt batteries but I'd like to use a power adapter instead. Does anyone know if the 12 volt adapters that Dunlop currently sells for their line of Rockman ACE headphone amps will work?

I don't know for sure if the original SR&D ACE headphone amps used the same polarity, positive tip - negative shield, but I can't see why that would change. The barrel size is different than the typical stomp box adapter and polarity as well.

I just wanted to check before plugging it in.

Thanks!

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Guitarvamp
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Re: Power adapter for UDG

Post by Guitarvamp » Mon Aug 25, 2014 2:44 pm

It should say, right where you plug it in, what the voltage and polarity is.

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darthoverdrive
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Re: Power adapter for UDG

Post by darthoverdrive » Mon Aug 25, 2014 3:43 pm

It shows the voltage, +12V, but no polarity. Used the DVM and made some measurements with the batteries in and I'm fairly sure the tip is positive like the Dunlop adapters. Really just wanted to be sure. I'll give it a try tonight.

All the photos I found online were too blurry to tell.

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Guitarvamp
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Re: Power adapter for UDG

Post by Guitarvamp » Mon Aug 25, 2014 7:50 pm

It would be 12 volts DC, with a positive tip.

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darthoverdrive
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Re: Power adapter for UDG

Post by darthoverdrive » Wed Aug 27, 2014 11:49 am

Thanks, tried it out last night and it worked great. That will save on batteries.

When I bought my first Dunlop reissue of the Rockman ACE I questioned the barrel size and polarity of the adapter. It was non-standard compared to say BOSS pedals or a variety of other brands. Now I see it was SR&D that decided upon that. Interesting.

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Guitarvamp
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Re: Power adapter for UDG

Post by Guitarvamp » Wed Aug 27, 2014 2:04 pm

Which adapter did you get? I have one for my UDG, and it screams like crazy - a really high-pitched whine. I tried a couple others over the years, and they all seem to do it.

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darthoverdrive
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Re: Power adapter for UDG

Post by darthoverdrive » Wed Aug 27, 2014 4:39 pm

Mine is made by Dunlop, I bought it when I bought the Guitar ACE, probably three years ago.

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Guitarvamp
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Re: Power adapter for UDG

Post by Guitarvamp » Wed Aug 27, 2014 5:14 pm

Thanks. I'll have to try out a new one. Maybe mine is too old or something. The other ones.... maybe they weren't made for musical equipment. Who knows.

Ultimatum
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Correct Power Adapter for UDG

Post by Ultimatum » Sat Oct 18, 2014 9:01 pm

Guys, here is an original power-supply that shipped with the Ultimatum pedals. I have a few of these original supplies, this one just so happens to be the 100v version that I have photographed, as it was first out the drawer. Help this helps! I don't recommend using any Dunlop made "Rockman" power-supplies on original Rockman gear, as I'm pretty certain Dunlop uses reverse polarity! This being something they changed over to when they took over the company.
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Guitarvamp
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Re: Correct Power Adapter for UDG

Post by Guitarvamp » Mon Oct 20, 2014 12:38 am

Ultimatum wrote: I don't recommend using any Dunlop made "Rockman" power-supplies on original Rockman gear, as I'm pretty certain Dunlop uses reverse polarity! This being something they changed over to when they took over the company.
Well, as luck would have it, the Dunlop adapters are the same.
Image

If you are ever in doubt about the polarity, the Rockman unit should list it (or it will be in the free online manual), and of course the power supply will also list what it's putting out. No worries. :)

Amazon sells them for less than $15.
http://www.amazon.com/Jim-Dunlop-DUNLOP ... B00GXNF2NS



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