dwight dkelvey at hotmail.com
Tue Feb 6 12:43:02 CST 2018

It might be a good idea to put color codes like on a resistor on the connector plug. You know, green for 5 gold for + center pin and silver for - center pin.

No gold or silver band would be AC.

Brown Red Gold would be 12VDC + on center pin.


From: cctalk <cctalk-bounces at classiccmp.org> on behalf of Chuck Guzis via cctalk <cctalk at classiccmp.org>
Sent: Tuesday, February 6, 2018 7:28:38 AM
To: Tor Arntsen via cctalk
Subject: Re: [RESOLVED] Re: EPROM baking

On 02/06/2018 12:05 AM, Tor Arntsen via cctalk wrote:

> .. which led me to accidentally power a USB hub with 12V instead of
> 5V - the power supplies looked the same, had the same plug, and I
> couldn't read the tiny writing on the warts. That blew the nicest
> notebook PC I've ever found - I bought it in Japan at a special
> price, the normal price is out of my league.

I've done worse--used an AC-supply wall wart on a piece of equipment.
Poor thing didn't stand a chance.

You'd have thought that after all these years, some sort of keying
system would have been developed, but I guess not.


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