[TowerTalk] insulated wire as radials and antennas.
Tom Rauch
w8ji at contesting.com
Tue Feb 22 14:20:31 EST 2005
> To which I have to append...that's 600V @ 60Hz! God knows
what it is
> at 7 MHz.
It's a whole lot higher than 600 volts. 600V is the listed
insulation rating, not the breakdown voltage. Fresh
insulation would hold off at least a few kV peak. The
wire-to-wire voltage, especially considering phase
difference is not likely to be 180 degrees, must be
considerably higher than a few kV in order to burn through
two layers of insulation. Frequency doesn't matter a great
deal.
This is why a few sparse radials often are several dB down
from a large ground system.
73 Tom
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