Well that is neat.
It pulls two power supplies a + and a =3D off the ac line.
No you can not run this off of dc.
You can rewire it to run off of two dc batteries easy enough.
I can do that mod for you if you like Rob.
--- In Rob Danielson <>
> Hi Dave--
> No transformer I can see.
> Hope you see something interesting, Best, Rob D.
> =3D =3D =3D
> At 2:56 AM +0000 8/26/04, Dave J wrote:
> >If the input measures as a low resistance then
> >there is probably an internal 50/60 Hz transformer
> >which would imply DC should not be applied. If you
> >know for a fact that there is no internal transformer
> >then it should be possible to run the unit on 12VDC
> >unless something really tricky is being done.
> >Before applying voltage try e-mailing M-Audio;
> >"support at m-audio dot de"
> >I would be willing to look at a unit but a few decent
> >photos of the insides of one would probably give us
> >the answer.
> >--- Rob Danielson <> wrote:
> >> Something ingeniously simple like this is what we
> >> need. I just tried 10 volts into my Audio Buddy
> >> and the main power LED doesn't light. I recall
> >> discussion about Len Moskowitz's involved M-Audio
> >> Duo modification for portable DC which also has
> >> the 10 VAC input. The phantom power LED will
> >> light with a 10 VDC input; this might be a clue
> >> as to getting more power to this part of the
> >> circuit. We were attaching the 4- 9volt batteries
> >> for +18 and -18 before the regulators. The
> >> phantom voltage provided was low, ~40 volts. The
> >> A-B spec sheets shows the 10VAC at 300ma; the 9
> >> volt batteries don't seem seem have have enough
> >> current. If someone on this list familiar with
> >> this kind of circuitry has the interest and time
> >> to work out a portable power solution, I'll send
> >> them my Audio Buddy to study and modify. Best,
> >> Rob D.
> >"Microphones are not ears,
> >Loudspeakers are not birds,
> >A listening room is not nature."
> >Klas Strandberg
> >Yahoo! Groups Links
> Rob Danielson
> Film Department
> University of Wisconsin-Milwaukee
>From Tue Mar 8 18:27:41 2005
Date: Tue, 24 Aug 2004 18:41:09 -0000
From: "Dave J" <>
Subject: Re: Velcro Mounting?
Yes I have mixed feelings. It might only be appropriate
for carefully considered surfaces. I might be better
off using double-sided foam tape to attach my minidisc
to a plate that could then be attached by thumbscrews
or some sort of reliable quick-release. That would also
eliminate the need to apply torque to the unit every
time I remove it.
--- Yannick <> wrote:
> hello all,
> i also used velcro on my dat.
> i will never do that again : it worked very
> well in france, but here in summer in taiwan
> the glue melted and now there a little bit of
> glue all around my recorder... very bad...
> (big typhoons here.. huge sounds..)
> --- Dave <> wrote:
> I use adhesive velcro/hook-n-loop to fasten my PCM-M1
> DAT to my MP-2 preamp. (I also have a 4 D-cell
> battery holder velcro-attached to the other side of
> my MP-2.) With a camera strap attached to the MP-2 it
> makes a nice portable setup, albeit with several
> audio/power jumpers running all around it.
Dave J wrote:
> >> Does anyone use velcro to hold a minidisc
> >> in place? I don't see too many options for
> >> strapping it down without blocking one or
> >> another button. I only have the MZ-R50.