[Antennas] CAROLINA WINDOM???

Sat Feb 12 17:12:38 EST 2005

The N4GG antenna is a type of curtain antenna but uses an isolation balun.
Before I knew the details about it, I made one. It is basically a dipole
that is one wave length long with quarter wavelength elements hanging
vertical from the ends of the antenna. My biggest discovery was that it was
so much quieter than my half-wave dipole. Unfortunately, I took it down
before realizing that the 'quiet' was part of the antenna characteristics. 
One day I'll put it back up, but from what I learned from the designer,
N4GG, it is not good for local domestic operation but great for DX.
He says it needs a 1:1 balun or unun at the wire. A modification I am
thinking of is to use the unun 1/4 electrical wavelength down the coax from
the antenna. The reason is that if I am correct, it will give the third
vertical resonator similar to the curtain antenna. 
Comments?
Buck
N4GPW
-----Original Message-----
From: antennas-bounces at mailman.qth.net
[mailto:antennas-bounces at mailman.qth.net] On Behalf Of Gene Mason
Sent: Saturday, February 12, 2005 4:51 PM
To: fkamp at comcast.net; w2yj at highstream.net
Cc: antennas at mailman.qth.net
Subject: Re: [Antennas] CAROLINA WINDOM???
 Sir Simpler is always best !
 ARRL has several good books on DX antennas.
 Any vertical 1/4, 5/8's or 1/2 wave will out perform most
 horizontal antenna's on any given band opening. Phase two of them or
 4 of them in a 4-square configuration or listen to the big signals on
 75m dx window any evening, An evening of reading the ARRL antenna
 Compendium, Vol 6, specifically the article about the performance of
 the verticals on the beach will make a believer out of most open
 minded purists. Tom Shiller ( Force -12) points out the model results
 and the actual contest performance results of how 4 verticals
 outshine a 4 element beam at 200 ft. (A 1/2 wave vertical does not
 require any radials) My 1/2 wave 40m vertical is 24 ft tall total,
 yes it has a coil in the center, but is measured at 92 % efficiency.
 If you get real brave , search the Internet for Cebik's website and
 read the section on wire arrays. a bobtail curtain, sterba curtain,
 Bruce Arrays are discussed in detail. Most or all of the wire arrays
 can be used on all bands, with a little compromise, yet effective.
 My recommendation, invest in a MFJ antenna analyzer, a few good
 books, a 30$ 500' spool of stranded wire #14AWG, from Home Depot or
 Lowes, a 4:1 balun and 100' of RG11 or RG 8 X. Turn your radio off for
 a few evenings, and read the results of modern day technical Giants
 dedication to scientific principles. Then string up an array of your
 choice about the total length of a 80m dipole and hold on to your
 chair, turn your radio back on, and listen to signals 10 db stronger
 than you have ever hear them, and compete with the big linears and big
 towers, much to your surprise , only exceeded by theirs !
 GooD DX
 KZ5V
 From: fkamp at comcast.net
 To: w2yj at highstream.net
 CC: antennas at mailman.qth.net
 Subject: Re: [Antennas] CAROLINA WINDOM???
 Date: 2005年2月10日 09:17:27 -0600
 w2yj at highstream.net wrote:
 >
 > Anyone have any experience using a Carolina Windom? I do a lot of
 DX'ing and am
 > considering this make of antenna as it has a vertical radiation
 section for low
 > angle radiation.
 > My other choice is a 80, 40 trapped sloped dipole.
 > At present I use a 270 foot flat-top fed with open wire feeders for
 the low
 > bands and a StepIR 3 element beam for 20 through 10.
 George,
 I have used a windom. It probably did have some vertical radiation
 from
 the feedline but I would not consider its performance superior to the
 80/40 trap dipole I now use. I would not consider either of these
 antennas particularly suited for serious DX work.
 I would also think that a 270 foor flat-top dipole would beat out both
 antennas for DX performance if the flat top is at a decent height.
 My best, wire, DX antenna is a 40 meter right angle loop. Apex up at
 50
 feet with base at about 15 feet.
 Regards,
 Frank Kamp
 K5DKZ
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