[Boatanchors] Re: [Hallicrafters] Re: Dipole antenna

George KB2Z Thermionic_Emission at earthlink.net
Wed Feb 23 06:07:37 EST 2005


Vern,
Would the coax ground be on the antenna or station side of the coil?
Thanks, George kb2z

At 02:22 AM 2/23/05 -0500, you wrote:

>Not a bad practice to adhere to when bringing coax transmission line into
>a building/house but does nothing to alleviate the balanced to unbalanced
>situation at the feed point.
>
>Pete, wa2cwa
>
>
>On Wed, 23 Feb 2005 00:56:26 -0600 "Smokey" <redhair at intergate.com>
>writes:
> > The coiling of coax for many years has been used by commercial
>installations for lightning protection. This little bit of inductance
>provides anitsy-bitsy amount of resistance to the path of high voltage
>high current lightning. Experts even suggest as little as a single turn
>coil in a coax line helps. What the commercial stations do, though, is
>NOT put the coil at the feedpoint. The coil (or "drip loop" as it is
>sometimes known) should be positioned near where the coax enters the
>station with the coax shield grounded prior to that point. The theory is
>that the resistive inductance to lightning is sufficient to discourage it
>from continuing into the station and, instead, it takes the direct path
>to the ground provided by the shield-to-ground lead.
> > Vern Weiss W9STB
> > All CW in the Northwoods
> >
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