Looking for a reasonably priced electric blanket - Page 7

 Don K wrote:

into the

Could be the plastic fats in your peanut butter and cookies  forming an
"armour plating".



A properly-constructed hat, resembling a Faraday cage would work.

  Don K wrote:

into the

Not stopping the magnetic field but cancelling it. The closer the wires
are together the shorter the distance before it's field is cancelled by
an opposing field. Much as the reason why twisted pairs are used in data
lines (to prevent induced voltages from outside fields).

Newer PTC electric blankets have very low magnetic fields, but I do not
know what the actual standards are on current blankets. I had thought
reduced fields were mandated (in the US) but I can't find evidence of that.

   Jeff

 
into the

together the

as the

from

I understand that, but I was nit-picking over the choice of words. The field is
strongest close in , but it extends out forever. It might make sense to talk
about
the distance at which the field falls below ambient intensity, but the word
"penetrate" is somewhat misleading IMO.


what the

mandated (in

From what I read in IEEE Explorer, PTC does work well to cancel fields,
but one of the federal regulating agencies won't approve its use in blankets
because there's a potential for higher leakage current.

Don

 Don K wrote:


into the

together the

as the

from

about

   That makes sense. Particularly since you have a reputation to know
these things!

what the

mandated (in

   I'm not quite sure what to make of that. On the surface it sounds
like a government agency is doing it's job.  But given the overall
climate of mission change these last years I wonder what the real reason is.

   Jeff

 .
you got 8 years use out of it;
think of it as an investment;
don't be too frugal on this long term investment

over the last 35 years,
i've been through 2 electric blankets

waterboy