Mike: See Stewart's reply. Any antenna that is shipboard is in a very hostile
environment.
The nitrogen kept things dry and not corroding. Might keep in mind all TV
stations havenitrogen in their feed lines. I have put up several of those 20
foot sections and you have to makesure they are tight. Pull a vacuum and then
back-fill.
The nitrogen keep you tires inflated more closely that the traditional air.
The expansion ratiois more tighter than air. Better gas mileage? Don't know
about that.....Sounds good tho.
73 Clayton N4EV
From: Mike Bryce <prosolar@sssnet.com>
To: Clayton Brantley <clayton_n4ev@yahoo.com>; Discussion of Ten-Tec Equipment
<tentec@contesting.com>
Sent: Tuesday, September 22, 2015 1:42 PM
Subject: Re: [TenTec] OCF Antennas - Which commercial antenna is gest?
Why the nitrogen?
Last time I had tires replaced the guy wanted me to have the tires filled with
Nitrogen. Said I’d get better gas mileage and would prevent ingrown toenails.
Mike Bryce WB8VGE
prosolar@sssnet.com
> On Sep 22, 2015, at 11:54 AM, Clayton Brantley via TenTec
> <tentec@contesting.com> wrote:
>
> What antenna is BEST???? Very good question. I worked for a few years with
> Al Henderson ex K6AJ now a SK.He made antennas for the navy and a few other
> users. Most were verticals that would tune to 1/4 wave length inside
> some special piping that was filled with nitrogen. These things would run
> north of $10k! Worked like a champ too.He had pictures of his antennas
> mounted on aircraft carriers.
> Now to the point of this discussion, Al told me the impedance of free space
> is 377 ohms and that is why the quad antennais such a good antenna. He
> maintained that an antenna could be simply thought of as a transformer to
> bring the outputof the transmitter from 50 ohms to 377 ohms. The biggest
> part of the antenna that is near the "magic 377 ohms" worksthe best.
> I know this might be a bit off the original topic, but thought I'd toss Al's
> ideas out and see what others think.
> 73 Clayton N4EV
>
>
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