RadioBanter - View Single Post

June 17th 06, 05:09 PM posted to rec.radio.amateur.antenna

wrote:

In conditions where there is corona or the potential for corona, quads
are less susceptable to noise.

Quads are also less susceptible to noise from charged particles
because they tend to distribute the charge locally instead of
through the transmission line like a dipole does.

Corona is like being pregnant. It either exists or it doesn't.
Corona is steady-state ionization of the air. Arcing can occur
without corona.

Or worse yet they argue moisture prevents corona, when the entire
reason the quad was "invented" was to prevent coronal errosion of
dipole elements in the moist air at HCJB.

Apples and oranges, Tom. Since nobody has argued that high
humidity prevents corona during transmitting, your statement
is just an unfair obfuscation of the facts. On a clear-sky,
high-humidity day, the high humidity prevents corona on *receiving*
antennas. The antenna at HCJB did *NOT* report any corona problems
during receive.

The antenna at HCJB had corona problems when 10 KW of
power was being supplied by the transmitter. The energy
necessary to cause the corona was coming from the
transmitter, not from the atmosphere.
--
73, Cecil http://www.qsl.net/w5dxp