[Antennas] Mosley Classic 33 Balun?

Sat Dec 11 15:56:25 EST 2004

Don,
Your assumption about the need of the balun is correct. The Classic feed
will work without the balun but the resulting antenna pattern is likely to
not be symmetrical. I have been using the CL-33's brother CL-36
satisfactorily, for many years.
The simple balun recommended by Moseley in their instructions consist of 4
turns of your feed coax with an inside diameter of about 4 inches, mounted
close to the feed connector. It is easy to construct and works fine. Make
the turns over a flat form so they are next to each other not just lumped
together. Tape the turns to hold the cyndrical form. You can then remove
the form or just leave it there if you like.
Enjoy, Merry Christmas and 73,
Ray, W4BYG
Naples, FL
----- Original Message ----- 
From: "Don Boyer" <don.boyer at gte.net>
To: <antennas at mailman.qth.net>
Sent: Saturday, December 11, 2004 2:26 PM
Subject: [Antennas] Mosley Classic 33 Balun?
> I recently obtained a Mosley Classic 33 antenna that appears to be in
> excellent shape. It has an SO-239 coax connector to the antenna's
"Classic
> Match". The Mosley website indicates that for The Classic System: "To
> isolate the outer coax conductor from ground, the coax line is coiled for
a
> few turns near the antenna end. This is designed to prevent the very
> unlikely effect of Feed Line Radiation". I have also heard that with the
> Classic 33, you can connect your coax directly to the SO-239.
>> Is this coiled coax actually needed and if so, how many turns, what
diameter
> is the coil and where is the coil located? (I typically use RG-8 coax)
Any
> comments regarding this interface would be greatly appreciated. The
coiled
> coax may not even be required. This is unclear to me.
>> Also, any repair / maintenance pointers would be helpful before I put the
> antenna on my tower. Thank you.
>> Don - WB0AIN
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