Make sure they are AC/DC adapters. Some are AC/AC adapters. Also make sure the plug is properly polarized. Some plugs the inside is (+) and the outside is (-), some are switched. Make sure the current rating (mA or A) is greater than what you need. Make sure the voltage is the same.

Eric

On Wed, Jul 22, 2009 at 2:55 PM, Nadim Hoque <nadimhoque@gmail.com> wrote:
Actually use the 210 because u will break the 80ma one and will only take 100ma from the 210.
------Original Message------
From: Josef Lowder
Sender: plug-discuss-bounces@lists.plug.phoenix.az.us
To: Plug
ReplyTo: Main PLUG discussion list
Subject: OT: AC/DC adaptors
Sent: Jul 22, 2009 14:42

Does an AC/DC adaptor need to be an exact match to be safe and not
damage electrical equipment?

I have several dozen "left-over" AC/DC adaptors, but none exactly
match a small Radio Shack mixer that is going through 9-volt batteries
too fast.  And, rather than buying yet another such adaptor, I went
through my collection of left-overs to see if I could find one to
match.  Close, but not quite.

I need a 9v 100 mA adaptor; and in my collection I have one 9v 80 mA
and one 9v 210 mA.  Could either of those be used safely?

One says it can be either a 6v 200 mA or a 7.5v 100 mA which leads me
to think that perhaps there might be some flexibility in this.  I have
a bunch of 9v at various mA ratings, along with a bunch of 3v, 5v, 6v,
8v, 11v, 12v, 15v, 19v at various mA ratings.
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Nadim Hoque
Cell: 480-518-6235
Address: 6302 West Kent Drive
Chandler, Arizona 85226
Sent via BlackBerry from T-Mobile
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Eric Cope
http://cope-et-al.com