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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