Howard wrote:
On 23 Oct 2004 04:27:21 GMT, ospam
(Theplanters95) wrote:


If the radials are to decouple feedline radiation, then why wouldn't coax
coiled into a choke balun work? Maybe 6 or 10 turns at about 5 or 6 inches?

Randy


You could give it a try and see how it works for you, definitely
simple to do. Just because Cushcraft uses the 1/4 wave coax & radials
doesn't make that the 'only' solution. Another possibility is a
ferrite balun; type 43 ferrite torroids with an ID to provide a snug
fit over the coax. This approach is shown on some of the variation of
the J-pole so if you do a search for that antenna you may find a
starting point for the number/size of the torroids.

Howard
KE6something or other
Also, consider that those radials arn't there just to decouple the coax!
they are also there to form a 1/4 wave ground radial, 1/2 wave down the pipe
to form a counterpoise for the Ringo- Something that the toroid would NOT do,
if memory serves me correctly!
Jim NN7K

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On Sat, 23 Oct 2004 21:04:21 GMT, "NN7KexNOSPAMk7zfg"
wrote:

Howard wrote:
On 23 Oct 2004 04:27:21 GMT, ospam
(Theplanters95) wrote:


If the radials are to decouple feedline radiation, then why wouldn't coax
coiled into a choke balun work? Maybe 6 or 10 turns at about 5 or 6 inches?

Randy


You could give it a try and see how it works for you, definitely
simple to do. Just because Cushcraft uses the 1/4 wave coax & radials
doesn't make that the 'only' solution. Another possibility is a
ferrite balun; type 43 ferrite torroids with an ID to provide a snug
fit over the coax. This approach is shown on some of the variation of
the J-pole so if you do a search for that antenna you may find a
starting point for the number/size of the torroids.

Howard
KE6something or other
Also, consider that those radials arn't there just to decouple the coax!
they are also there to form a 1/4 wave ground radial, 1/2 wave down the pipe
to form a counterpoise for the Ringo- Something that the toroid would NOT do,
if memory serves me correctly!
Jim NN7K

Hadn't fully looked at that aspect as this antenna is billed as a 1/2
wave not requiring a ground plane. Your memory does serve you
correctly though; the toroids, or a choke balun, would not perform
that function. Those I know who've used this antenna fall in two
camps, with no middle ground, some swear by it and others say it's a
nice antenna to use to mount their 1/4 wave verticals. Can't say from
direct experience though as I've never used one. For verticals I've
only used 1/4 and 5/8 wave antenna's and those have been home brewed
so easily I couldn't bring myself to pay for one.

Thanks for the added perspective Jim,
Howard KE6MAK

The mast is just as much a problem as the feedline, and difficult to coil up.

--
Crazy George
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"Theplanters95" wrote in message ...
If the radials are to decouple feedline radiation, then why wouldn't coax
coiled into a choke balun work? Maybe 6 or 10 turns at about 5 or 6 inches?

Randy