[R-390] cables

[GENE BALINSKI]

Old wives tale was "5" knots in a TV power cord would protect it from lightning

73
Gene K1NR

> On September 22, 2017 at 11:54 AM Bob kb8tq <kb8tq at n1k.org> wrote:
>
>
> Hi
>
> Putting a couple turn “coil” in power cords or coax is a cheap
> and simple way to make a common mode choke. The inductance
> may not be large. It does not have to be super big. You want to
> knock down the current to something manageable. You don’t have
> to eliminate it entirely. (Yes, Motorola paid for the collage course
> I learned that in ….).
>
> Bob
>
> > On Sep 21, 2017, at 9:25 PM, Glenn Little WB4UIV <glennmaillist at bellsouth.net> wrote:
> >
> > Believe it or not, pun intended, Motorola would put knots in their power cords at communications sites.
> > This was to provide an impedance to impulse (lightning).
> > Not sure if it really worked, but, it was done at a lot of their sites.
> >
> > 73
> > Glenn
> > WB4UIV
> >
> > On 9/21/2017 10:36 AM, wb3fau55 at neo.rr.com wrote:
> >> On the subject of "electricity flowing out", if you put a knot in your power cord, you will stop the flow of electricity, sort of like resistance or impedance. wb3fau.
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> > --
> > -----------------------------------------------------------------------
> > Glenn Little ARRL Technical Specialist QCWA LM 28417
> > Amateur Callsign: WB4UIV wb4uiv at arrl.net AMSAT LM 2178
> > QTH: Goose Creek, SC USA (EM92xx) USSVI LM NRA LM SBE ARRL TAPR
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> > of the Amateur that holds the license"
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