In a message dated 12/19/2007 12:01:00 A.M. Eastern Standard Time,
gbrierton@hotmail.com writes:
OK, Michael, I have got to hear more about how that would work! Can
somebody please explain this to a non-electrical engineer (me)?
------------------------------------------
Hi Gary--
Well, as Dave Barry says: "I AM NOT MAKING THIS UP!" I was shown this
trick when I was a young kid hanging around the shop of an old geezer
mechanic.
He simply said that the knot "cancelled" the EMI (electromotive interference)
and it did work, at least on my car, a TR3. Now this was for an AM radio
and back then (1958 or so) ignition wires were, I am sure, solid copper.
Perhaps resistor wires would do as good or better job but Dan said he did not
want
to use them.
You're not the only Doubting Thomas in the group and subsequent to my post I
did a bit of google searching for anything online about this. Go to
_http://www.overclockers.com/tips1132/index03.asp_
(http://www.overclockers.com/tips1132/index03.asp) and scroll down till you
find the following:
"Al Smith aka oldbrave says:
"This is not A NEW IDEA!
In 1956 and 1957, Ford Motor Co. used this very simple solution on the coil
wire of the Thunderbird to greatly reduce EMI to the radio and it had no
apparent effect on the operation of the Ignition system! As a matter of fact,
it's something that knowledgeable collectors look for in the identification of
original and/or properly restored cars!"
Twisting wires cancels or reduces magnetic interference--for example the
positive and negative wires running to DC compass lights on boats are always
to
be twisted so that they will not induce a magnetic effect on the compass card
when the circuit is energized.
That's about all I can tell you--perhaps Dan will share with us how it worked
out for him.
Best--Michael Oritt
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