[TowerTalk] How to mount choke balun?

[Bill Coleman]

On 11/15/01 9:18 PM, Tom Osborne at w7why@harborside.com wrote:

>I may be wrong, but I thought the coils need to be at least 8" in
>diameter to work.  Isn't winding RG8 in a 4" circle kinda
>stressing it a bit? 

Ed Gilbert's famous posting about coiled coax baluns mentions using a 4" 
form. It should not be a problem so long as a solid dielectric coax is 
used. Foam dielectric coax might suffer from some center conductor 
migration -- which could lead to a failure.

Regardless, from Ed's note, you really need a form for a coiled coax 
balun anyway. You want the coax in one layer, and you don't want to bunch 
the turns at all. That's really hard to do without a form.



Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr@arrl.net
Quote: "Not within a thousand years will man ever fly!"
            -- Wilbur Wright, 1901


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