[Coco] transformer hum in a coco when off?

[Bruce W. Calkins]

Yes, the transformer is always electrically hot, unless you put your CoCo 
and peripherals on a power strip.  I have used power strips for my CoCos 
since 1983.  I begrudge a watt or 10 that does nothing.

Bruce W.

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----- Original Message ----- 

From: "Jeremy Michea"

> 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.

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> ----- Original Message -----
> From: Gene Heskett

>
> 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. --