It depends on the velocity factor of the coax I'd imagine.
I think the VF depends greatly on the dielectric. Foam <> solid.
73 de Lee
--
Lee Hiers, AA4GA
www.aa4ga.com
Submit your QRP DXCC totals to www.qrpdx.com!
On Mon, Sep 9, 2013 at 4:24 PM, Courtney Judd <k4wi at earthlink.net> wrote:
> ok antenna gurus what did i do wrong? originally the swr on this 4 el
> Hygain 6 mtr beam was a perfect 1:1 at 50.1 . But I wanted to run high
> power thru it so the manual calls to change the coax balun from rg58 to
> rg213 which i did except I think that the coax was RG8. It was cut to the
> same length as the 58 as per the manual. Now the swr at 50.1 is 2:1 and the
> resonant point for 1:1 is clear up at 52.0 . I don't want to change the
> element lengths as they should be right on. Only thing else is move the
> beta match in or out some.... or match it some other way. Would the 213/rg8
> make that kind of difference? Maybe I should change the length of that
> coax! Ideas? help!!!! lol, Cort K4WI
>
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