On 3/31/17 2:17 PM, Doug Smith wrote:
Voltage at dipole tips — it’s a kind of interesting question.
I was thinking of putting a dipole in a stand of aspen trees which I
do NOT want to burn down. There is no way to route the wires to
completely avoid contact with the twig-like upper branches. And, I
do run full power.
I did find some high voltage wire by Gore that is rated at 13 KV
although I’m not sure that was at RF — might have been DC. It is
insulated with PTFE. Looked interesting..
what you want is GTO-15 Tube Sign & Ignition Cable (aka wire) - used for
wiring neon signs - typically a tough, black outer covering, dielectric
layer inside, and AWG14 wire
It *is* a bit pricey (0.50/ft?) in small quantities
It's used for wire antennas on boats, too (so you can buy it at West Marine)
They make a wide variety of flavors and colors.. all silicone, thinner
and more flexible, etc.
The idea of looking at the feed point impedance of a 1 wavelength
doublet for a first order approximation is a good one. I may try
modeling that, just to bring closure to my idea..
73, Doug, W7KF
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