rec.radio.amateur.antenna Google Group

Re: Parallel tank circuit

arthurun...@gmail.com (Art Unwin) — Mon, 15 Mar 2010 14:18:46 UT

A few words on hole size (perforations) and mesh material. The
particle carrying charge
is of the smallest mass possible which is why it travels at the
fastest speed known so it stands to reason that it will penetrate the
smallest hole let alone chicken wire.
Well the particle is as small as the point of a cork screw but that

Re: Parallel tank circuit

arthurun...@gmail.com (Art Unwin) — Mon, 15 Mar 2010 13:35:36 UT

Had an E mail asking questions about the antenna not wanting to post
on the group!
My meshg curtain moves away from the other antennas that I have made
with window mesh which are designed for tower top with a rotor. The
curtain I have made is much bigger than required but with commercial
statiions using curtain style antennas I thought I would make one out

Re: Art's quiet mesh antenna

je...@cruzio.com (Jeff Liebermann) — Mon, 15 Mar 2010 04:30:42 UT

Art's patents:
Constant impedance matching system
<[link]>
Variable capacitance antenna for multiband reception and transmission
<[link]>
Push button arranged for mounting to a panel
<[link]>

Alliance Tenna-Rotor for sale

wa0...@arrl.net (Henry) — Mon, 15 Mar 2010 04:23:49 UT

I have an Alliance Tenna-Rotor model T-20 with control box for sale.
It has about 87 feet of 4 conductor cable that goes with it. It can
be viewed at:
[link]
or
[link]
I'm asking $30 plus shipping CUS.

Re: Parallel tank circuit

arthurun...@gmail.com (Art Unwin) — Mon, 15 Mar 2010 03:17:44 UT

Front to REAR would appear to be equal
or better than a dish!
Makes for a very quiet receiving antenna as well as being very good
for transmitting
basing gain on aperture. Very easy to reverse direction using a spst
relay.

Re: Art's quiet mesh antenna

news4...@taring.org (tom) — Mon, 15 Mar 2010 02:07:43 UT

Bill wrote:
Well he seems to have contributed something.
Something which is not identifiable as actually useful, but something
none the less.
I anxiously await his contributions.
tom
K0TAR

Re: Art's quiet mesh antenna

jaroli...@gmail.com (jaroslav lipka) — Mon, 15 Mar 2010 01:05:00 UT

All we need now are posts from "Dick" and "Harry" and we will
have the true measure of the posters on this thread.
Jaro

Re: Art's quiet mesh antenna

news4...@taring.org (tom) — Mon, 15 Mar 2010 00:52:27 UT

tom wrote:
Aaarrrttt!! Where are you?
Let's have a nice QSO with you using you wondertenna.
Of course we will never know how it really works since you'll have to
use a conventional antenna for the QSO because your wondertenna radiates
like a dummy load.
tom
K0TAR

Re: Art's quiet mesh antenna

johnasie...@optonline.net (John) — Sun, 14 Mar 2010 21:14:46 UT

But the April articles are wrutten to appear plausible

Re: Art's quiet mesh antenna

k4...@arrl.net (Bill) — Sun, 14 Mar 2010 19:56:54 UT

He should submit his articles for every April QST issue.

Re: Lossy Coax: how is energy lost ?

ianremovethisjack...@g3ohx.demon.co.uk (Ian Jackson) — Sun, 14 Mar 2010 17:01:22 UT

In message <4b9cb1a6$0$821$4fafb...@reade r5.news.tin.it>, Antonio
Vernucci <vernu...@tin.it> writes
For the 'linguistically challenged', with Internet Explorer 8, there is
usually right-click, select "Translate with Live Search". It works very
well!

Re: Lossy Coax: how is energy lost ?

menar...@orange.fr (JC) — Sun, 14 Mar 2010 14:34:50 UT

Thanks to all for your explanations, I now have a much better understanding
of the energy dissipation in a coax.
73 - JC
"JC" <menar...@orange.fr> a écrit dans le message de news:
4b9a78b0$0$17896$ba4ac...@read er.news.orange.fr...

Re: Lossy Coax: how is energy lost ?

vernu...@tin.it (Antonio Vernucci) — Sun, 14 Mar 2010 09:51:35 UT

Figure 22 of [link] separately shows loss caused by
copper (in red) and loss caused by dielectric (in blue) for a 100-meter run
(about 330 feet) of LMR-400 coax (similar to RG-213 with foam dielectric) versus
frequency.
The formulas used for the plot are shown just above it.

Re: Art's quiet mesh antenna

news4...@taring.org (tom) — Sun, 14 Mar 2010 03:42:48 UT

tom wrote:
Hey Art!
How about a sched? You give the frequency and time. I'm good on 40m
through 6.
tom
K0TAR

Re: Art's quiet mesh antenna

news4...@taring.org (tom) — Sun, 14 Mar 2010 03:38:26 UT

Bill wrote:
Based on his "designs", which don't seem to exist except as whimsical
nonsense, I would wager large amounts of cash that you couldn't possibly
have a QSO with him.
tom
K0TAR