Korg Poly800/EX800 Users

Gordon,

I beg to differ on this point, though I hesitate and exercise a hefty load of humility before doing so.

But the problem with your thesis is that no power supply should ever be considered without the load, even despite the proliferation of modern regulated power supplies.

And so, if a Poly owner does connect a 12V DC supply that is rated to 1Amp or higher and is (even worse) a regulated supply, then the additional 3 watts of power must be dissipated by the Poly 800 power regulator. Unfortunately, the design of the Poly power supply does not dissipate the additional 3 watts very well at all.

Those little BD transistors end up cooked - badly burned actually! Destroyed, busted, kaput!


Mike



________________________________
 From: Gordon JC Pearce <gordon@...>
To: korgpolyex@yahoogroups.com 
Sent: Monday, December 5, 2011 1:29 PM
Subject: Re: [korgpolyex] Re: Problem with my poly800 reverse keys edition... :/
 

  
On Mon, 05 Dec 2011 14:42:28 -0000
"iamakisgr" <iamakisgr@...> wrote:

> I recently call the one who gave me the poly and he told me that a reverse polarity adaptor was used and then it broke...

Running it off a 12V adaptor won't make any difference at all.  The stock Korg adaptor puts out around 14V off-load dropping to 11V when you stick the Poly-800 on it.

-- 
Gordon JC Pearce MM0YEQ <gordonjcp@...>