One of the factors for arc over is the diameter of the tower and
top support pipe diameter & length.
A really FAT 1/4 wave tower may have 1000 ohms at the top, while a
skinny tower would have much more.
The higher the impedance, the higher the voltage to cause arc overs.
73
Bruce-K1FZ
www.qsl.net/k1fz/beveragenotes.html
On Thu, 18 Dec 2014 10:05:16 -0600, Joel Harrison <w...@w5zn.org> wrote:
Stan - For about 8 years, up until this past spring, my shunt fed tower
> for 160 had a KT34XA (insulated elements, later upgraded to a KT36XA same
> insulated elements) at the top and I never experienced any issue at all
> running 1500 watts, even during a few contests where, as you know, you are
> running "continuous" for an extended period. I've read discussion about
> whether the coax should run inside -vs- outside the tower, mine ran
> outside.
>
> Thanks...Stan, K5GO
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>
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