[Elecraft] The Whip Wedge: An anti-rotation device for a whip on a right-angle BNC adapter

Joe Subich, W4TV lists at subich.com
Tue May 24 14:52:57 EDT 2016


A far simpler design would be in fact a cylinder with inner diameter
that is a friction fit for the whip itself having a semi-circular
cut-out on the bottom side above the BNC connector.

Slide the "wedge" down the antenna with the "notch" over the BNC
connector and you have in essence created a detent for the whip <G>.
One could probably accomplish the same purpose on a one off basis
by using a pair of interlocked wide tie-wraps - one around the BNC
connector and the other around the whip.

73,

    ... Joe, W4TV


On 5/24/2016 10:16 AM, Wayne Burdick wrote:
> If you use a whip with a right-angle BNC, it's free to rotate, and
> can flop over. Mathematically speaking, this is most likely to happen
> just as a breeze comes up and/or you were about to crack that Bouvet
> Island pileup using 1 watt.
>
> The simplest home-made anti-rotation device for use with your KX3 or
> KX2 is a piece of medium-soft rubber hose or tubing about 3/4" long.
> Simply wedge this bit of tubing between the right side panel and the
> whip's BNC connector.
>
> If the tubing is too long, it will put an unnecessary amount of force
> on the BNC connectors. Adjust as required so that you have just
> enough friction to prevent rotation.
>
> I proposed the name "Whip Wedge" in hopes that someone will now
> commercialize it. The rest is left as an exercise for the reader :)
>
> Ideally the Wedge would have a more interesting and functional shape
> than a simple cylinder. It might be a rectangular block with a
> semicircular cutout matching the side of the BNC connector. (Molding
> required.)
>
> 73, Wayne N6KR
>
>
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