[Coco] transformer hum in a coco when off?

[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.
> 
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CoCo's do NOT switch the primary side of the power transformer, so its 
drawing a watt or so when plugged in.

Cheers, Gene
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