Korg Poly800/EX800 Users

Hi everyone,

I know that this question has been asked a million times before, but my Poly-800 has no AC adaptor, and the cost of keeping batteries in it is killing me (plus, I'm re-loading patches a lot).

I tried a universal adaptor, but got no joy. Is there a Korg adaptor that I can buy today which will work, or can anyone suggest an adaptor from some other device which has worked for them

Also, aside from the .aif and .wav files on the internet that have the factory preset patch data, do any users out there have interesting patches of their own as sound files that they'd be willing to share?

Thanks... I'm trying to get my faithful old Poly-800 up and running so I can get it rocking alongside my wavestation.

Thanks all,
Shep

On Thu, 2009-04-30 at 15:34 +0000, bigfiver69 wrote:

> I tried a universal adaptor, but got no joy. Is there a Korg adaptor
> that I can buy today which will work, or can anyone suggest an adaptor
> from some other device which has worked for them
>

Universal adaptors almost never supply enough current for machines like
the Poly 800. Even if the voltage is right, when you apply a big fat
Poly 800 to the terminals you may as well be shorting it with a piece of
wire! You need something that puts out 9V and at least 700mA. More
current is good, less may make it unreliable. Anywhere between 8V and
10V should be "close enough", but try and keep to 9V - and definitely
not above 12V!

I use a 9V 4A (yes, 4 amps) regulated power supply for running a bunch
of 9V-powered synths and effects. It doesn't even get warm, unless I've
got everything on all the same time.

Gordon

I've seen power supply units on Musiciansfriend.com for universally powering foot pedals and such.  I wonder if one of those would suffice?

Gor

To: korgpolyex@yahoogroups.com
From: gordon@...
Date: Thu, 30 Apr 2009 17:50:21 +0100
Subject: Re: [korgpolyex] AC Adaptor question....

On Mon, 2009-05-04 at 14:02 -0700, Sean McCoy wrote:

>
> When I bought my used Poly 800 it had no power supply so I went to
> RadioShack and got a replacement. The guy there helped me and what I
> ended up getting was rated at 9V and 800mA. He said he wasn't sure
> what the amperage requirement was so he guessed something in the
> middle. Based on Gordon's recommendation of "at least 700mA" I'd say
> I got a pretty good replacement. It was a little under $20.

Like I said, more current is fine, as long as the voltage is okay.

Some people will say "aha but if you have too high a current you'll burn
stuff out" - but that's only true if the device will actually pull that
much current! Getting the voltage right is important, and having
*enough* current available is important. Too much is fine, as long as
nothing is trying to draw all that current ;-)

A car battery can provide about 500A peak (usually more). The starter
motor will draw a couple of hundred amps (the very large starter motor
on my Citroën CX pulls down over 250A on a cold morning, trying to churn
over a big heavy engine full of thick cold oil). The interior light
pulls about 400mA. Now if the "too high a current will burn stuff out"
people were right, then the interior light would blow as soon as you
opened the door, possibly with a spectacular shower of sparks! Why
doesn't it? Because devices only draw what they need.

If you wire it up backwards, and you can supply a high current, then you
can expect problems. Take care not to do that.

Gordon