---------- Forwarded message ----------
From: Dennis Gibson <<mailto:wb6tnb@xxxxxxxxx>wb6tnb@xxxxxxxxx>
Date: Thu, Apr 10, 2014 at 7:58 PM
Subject: Re: [IRCA] Radio World: Whatever Happened to the CFA?
To: Mailing list for the International Radio Club of America
<<mailto:irca@xxxxxxxxxxxxxxxx>irca@xxxxxxxxxxxxxxxx>
Great timing. It's currently being discussed by a number of
broadcast engineers on Facebook. Jim Hatfield's (as in Hatfield and
Dawson; an extremely highly respected broadcast engineering company
in Seattle) analysis is at:
<http://hatdaw.com/papers/JBH-CFA.pdf>http://hatdaw.com/papers/JBH-CFA.pdf
My opinion is anything he says goes. I've read a number of articles
he's written over the years. He's very highly respected in the
broadcast engineering field.
Two more links; the first is the theory and the second is someone's
opinion of the reality:
<http://www.crossedfieldantenna.com/pages/nab99cfa.htm>http://www.crossedfieldantenna.com/pages/nab99cfa.htm
http://www.paulzander.biz/Whats_Wrong_with_Cross_Field_Antenna.pdf
The engineers say there's no such thing as a free lunch.
Sent from my iPad
> On Apr 10, 2014, at 7:30 PM, Chuck Hutton
<<mailto:charlesh3@xxxxxxx>charlesh3@xxxxxxx> wrote:
>
> Les:
>
> Several US AM stations have used CFA antennas and also there was
an FCC licensed experimental station in the X band. Domestic DXers
(not me!) would have to tell you more.
>
> A ham has already written an extensive QEX article on the CFA.
See the May-June 2005 issue.
>
> Chuck
>
>> Date: Thu, 10 Apr 2014 10:19:36 -0500
>> From: <mailto:les@xxxxxxxxxxxxxxxx>les@xxxxxxxxxxxxxxxx
>> To: <mailto:am@xxxxxxxxxxx>am@xxxxxxxxxxx;
<mailto:irca@xxxxxxxxxxxxxxxx>irca@xxxxxxxxxxxxxxxx;
<mailto:abdx@xxxxxxxxxxxxxxx>abdx@xxxxxxxxxxxxxxx
>> Subject: [IRCA] Radio World: Whatever Happened to the CFA?
>>
>> The April 9th print edition of Radio World contains a commentary piece
>> by Robert E. Richer about the Crossed Field Antenna (CFA) and how it
>> fits into the FCC's vision for revitalizing the AM Band.
>>
>> He mentions that his company lacks only one more investor willing to
>> help complete work on the New Jersey test site CFA so that results can
>> be submitted to the FCC and the broadcast community. He talks about the
>> reluctance of some engineers to accept the radical design ideas of the
>> antenna.
>>
>> I'm certainly not an expert, but I've heard many who are level a lot of
>> criticism towards the antenna design. The only example that seems to
>> have performed as claimed is the original installation in Egypt (where
>> the antenna was placed on top of an elevated, copper clad building).
>>
>>
<http://en.wikipedia.org/wiki/Crossed_field_antenna>http://en.wikipedia.org/wiki/Crossed_field_antenna
>>
>> As a DX'er, I'd like to see the test site facility come online. It would
>> be a great catch (if possible, the antenna claims to reduce skywave
>> emissions) and an interesting bit of broadcast history.
>>
>> I do wonder why an amateur radio operator with a bit of land hasn't
>> built the design and tested in on either LF or 160 Meters. It would seem
>> to be a fascinating project and make for a nice QEX article.
>>
>>
>>
>>
>> --
>> 73,
>>
>>
>> Les Rayburn, N1LF
>> Maylene, AL
>> EM63
>>
>> Member NRC, IRCA, & Medium Wave DX Circle
>> Former CPC Chairman for NRC/IRCA
>>
>> Perseus SDR, SDR-IQ,Funcube Pro, Wellbrooke ALA-1530+ loop, LF
>> Engineering Active Whips,
>> Quantum Phaser, Kiwa Loop, Palstar MW Pre-Selector
>>
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