RadioBanter - View Single Post

October 23rd 04, 11:04 PM

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

--
To reply, remove the NOSPAM