"Home Brew" Noise Canceling (Anti-Jamming) Antenna

[RHF]

"Home Brew" Noise Canceling (Anti-Jamming) Antenna

This Antenna was Originally Designed as a simple and easy to build
Anti-Jamming Antenna for Radio Free Europe Listeners. They also
Claimed that this Antenna should work with reducing 'man made' local
noise.

http://origin.rfaweb.org/front/sira/

? Has anyone ever built this antenna and tried one of these to reduce
household noise?

? Anyone have any Reports of Successes in Helping to Eliminate Noise
around the shack?

~ RHF

[GO BEARCATS]

>? Has anyone ever built this antenna and tried one of these to reduce
>household noise?
>
>? Anyone have any Reports of Successes in Helping to Eliminate Noise
>around the shack?

It 'seems' it's the same thing as using a loop and a turntable. :-)

All that to do what a lazy susan and a loop can do. {?}

WA8007SWL

HQ129X / JRC NRD-515 / DX398 / Ross Model 2311 / RCA Victor Strato-World /
DX-399 / DX394 / DX402 / DX100 / Kloss Model One / Rhapsody

[GO BEARCATS]

> Has anyone ever built this antenna and tried one of these to reduce
>household noise?

My bad there RHF, I have the BCB on my mind tonight. ;-)

Still, seems like alot though.

[RHF]

DXLover,

I think this was designed for SW not the BCB.

~ RHF

= = = dxlover5...@aol.com (GO BEARCATS) wrote in message news:<20021010002433...@mb-fa.aol.com>...

[Radioguy]

Howdy RHF:

Thanks for the link. The featured CTL (Coplanar-Twin-Loop) may be one I
haven't seen as of yet. However, there was one described on the VOA/IBB web
site I looked at a couple of years ago.

This special and unusual antenna was designed by a heavy duty research
scientist at Stanford Research Institute by O.G. Villard. If you want a
paper to read with substantially more information on the theory and
construction of the antenna authored by the inventor see the article in QST,
'The Coplanar-Twin-Loop Antenna' September 1988, pages 29-35. You can get
reprints at ARRL Headquarters. The paper claims a null depth on sky-wave
(yes, that's sky-wave) signals of around 20 dB.

There was a very nice write-up in WRTH describing different models of the
CTL plus construction details but the article I have doesn't give a
publication date. I suspect it was an issue around 1989 or a couple of
years after. It was the issue that contained a review in 'Equipment Test
Bench' on the Grundig Yacht Boy 220.

I've seen references to the antenna in a couple of other publications as
well but I will have to search them out.

Do a search for the Coplanar-Twin-Loop' for more info. You are right, It
looks like a simple loop but it isn't.

Thanks, you got my interest up to try the CTL described in the link---it
will be awhile before I get to it though.

R.
-----

RHF <rhf-...@usa.com> wrote in message
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