Ray,
Is that 500 volts RMS or 500 volts peak? Coax, connectors, baluns,
insulators, etc. are usually rated for the peak voltage they will
tolerate without breakdown.
If you calculated that voltage derived from the power and Ohm's Law, you
would have Volts RMS and you may have something breaking down due to
excessive voltage (and that create problems like you are seeing).
73,
Don W3FPR
On 12/30/2013 2:44 PM, Walter Underwood wrote:
UHF connectors are rated for 500V. Maybe you need N connectors, which can
handle 1500V.
wunder
K6WRU
On Dec 30, 2013, at 11:13 AM, Ray Coles <[email protected]> wrote:
Forgot to mention that I hauled my MFJ wattmeter/dummy load out to the bush and
pushed up 100 watts into it down the feeder with 1:1 SWR, which convinced me
that at least my UR8 feeder is OK. Also didn't mention I hooked up my FG01
antenna analyser up at the shack and all seemed normal, but of course the
problem only comes over 40 watts (which equates to a pre balun 500V). THE
PROBLEM REMAINS and I am still mystified!
73
Sent from my iPhone
Ray Coles CEng M0XDL
10 Littlemoor Road,
Weymouth DT3 6AA
United Kingdom
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[email protected]
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