[Coco] transformer hum in a coco when off?

[Kip Koon]

I also use one of those old foot by foot or so power surge protectors that
was big enough to hold a monitor.  I use several, one above my workbench,
and on in my Coco Data Center.
Kip

-----Original Message-----
From: coco-bounces at maltedmedia.com [mailto:coco-bounces at maltedmedia.com] On
Behalf Of Jeremy Michea
Sent: Sunday, November 10, 2013 12:42 PM
To: CoCoList for Color Computer Enthusiasts
Subject: Re: [Coco] transformer hum in a coco when off?

so you're saying it's normal function Gene? Maybe its always been there but
pure happenstance that I had my ear pressed right up against it like that.
----- Original Message -----
From: Gene Heskett
Sent: 11/10/13 12:38 PM
To: coco at maltedmedia.com
Subject: Re: [Coco] transformer hum in a coco when off?

On Sunday 10 November 2013 12:37:37 Jeremy Michea did opine: > I was using a
coco 2 last night, turned it off and it was still plugged > in. A pen fell
behind the dresser my coco was sitting on and as I > reached for the pen my
ear was right up against the top of the coco, > right around where the PSU
would be inside and heard a very faint hum, > almost like 60 cycle hum, that
kind of thing. I then tried another coco > 2 and then a coco 3, same thing,
very faint hum coming from the psu > area. Also tried the charger for my
laptop and put that against my ear > - same thing. Tried the coco 2 in other
outlets in the house - same > thing - some are grounded, some aren't.
Doesn't seem to matter. Is this > normal when an electronic device is off
and plugged in? Home inspection > of the electrical was normal by the way. >
> -- > Coco mailing list > Coco at maltedmedia.com >
http://five.pairlist.net/mailman/listinfo/coco CoCo's do NOT switch the
primary side of the power transformer, so
  its drawing a watt or so when plugged in. Cheers, Gene -- "There are four
boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please
use in that order." -Ed Howdershelt (Author) A wise man can see more from
the bottom of a well than a fool can from a mountain top. A pen in the hand
of this president is far more dangerous than 200 million guns in the hands
of law-abiding citizens. -- Coco mailing list Coco at maltedmedia.com
http://five.pairlist.net/mailman/listinfo/coco

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