[Coco] transformer hum in a coco when off?

[Retro Canada]

i always use a fused power bar and turn it off when not using to help protecting against lightnings and other surges although the only safe solution would be unplugging it :)

On Nov 10, 2013, at 12:41 PM, "Jeremy Michea" <jmichea at mail.com> wrote:

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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