Richard,
At the moment I am interested in Richards comment that the
tines that he has SEEN commercially were pock marked because
of flashovers. Hearing that encourages me that my choice of
doing the same thing was a good one where I was persueing
the hope that it will reduce local noise and static crashes.
I am not a long time user of the top band but it doesn't
take a rocket scientist to see that any noise reduction on
receive will help! Maybe at a later date I will try my coax
coil idea, but for now I am useing existing wheels before
thinking about inventing a new wheel.
Ofcourse, any comments on the subject are very welcome in
the event I decide to change my aproach as this is new to
me with regards to prior personal construction.
Have you personally constructed an antenna with a coupling
interface and how did it work out.
By the way the tines are already on my antenna
but it will take time to determine any advantages.
Tho it is a horizontaly polarised antenna I assume there are
vertical components that could be erased BEFORE it gets
to my radio.
You may recall that my antenna is very narrow banded so as
to prevent extranious noise getting to the radio, in that the
signal is filtered before it is amplified and removed by
the radio's filter.This is the phillosophy behind
my design and it is hoped that tines will help here also.
Best regards
Art






Richard Clark wrote in message . ..
On 22 Dec 2003 07:07:20 -0800, (Art Unwin KB9MZ)
wrote:

Richard,
Thank you for that extensive reply. I now see that a
floating coax shield would be ineffective as a screen

A floating coax is as good as any shield to be used for a Faraday
Shield. It is used extensively in balanced loop constructions
everyday.

since it would not discriminate

You still don't get the purpose of the shield. It discriminates very
effectively - its whole purpose in life. Research Richard's comments
in Google.

I initially looked at a picket fence as having
two hortizontal members as well but now I see it as more
of a fork design with the tines at a 90 degree
axis to the axis of the secondary inductance and parallel
to the actual coils.

No such requirement exists - there are NO alignment issues. The
reason they fork is to eliminate current flow. Every power
transformer on this planet employing a Faraday Shield does it with a
solid sheet of copper. The copper does not conduct nor support
current loops because it is connected to ground at one point only.
Hence, such a design is consistent with the "fork" metaphor, if you
only think of it as having one, extremely wide tine.

Art, you have Terman, why don't you consult him?

We will see if works out for both
lightning and static as my tower is grounded together
with a heavy separate aluminum cable connected to my
ground grid. It has yet to be hit by lightning however

Best regards


Hi Art,

You should consult the Code as to grounding methods.

73's
Richard Clark, KB7QHC