Hi LF Group
In an attempt to
calculating the effect of ICE (Haw frost) on my antenna I get these
results.
With a wire diameter of
1.5mm flex weave, it comes out to 1.1 amps for 60 watts RF applied. This
is confirmed crudely by observing a pair of car festoon lamps (12Vx0.5A
each) in parallel in the antenna up lead glowing to full brightness.
With an estimated increase
in antenna wire diameter to 10mm caused by the Haw frost I did not notice
any change in antenna current by this method.
Running the calculation
through using a 10mm wire I get 1.2 amps and again to an absurd size of
20mm diameter there is virtually no increase in current.
The recent WX at this
location has had no noticeable effect on the antenna. If it did I would
suspect leakage through a dodgy insulator at the top of the inverted “L”
up lead.
The type I use is a deeply
ribbed glass insulator about 8 inches long.
73 es GL
petefmt
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