[TenTec] OCF Antennas - Which commercial antenna is gest?
clayton_n4ev at yahoo.com
Tue Sep 22 16:46:43 EDT 2015
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 at sssnet.com>
To: Clayton Brantley <clayton_n4ev at yahoo.com>; Discussion of Ten-Tec Equipment <tentec at 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 at sssnet.com
> On Sep 22, 2015, at 11:54 AM, Clayton Brantley via TenTec <tentec at 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
TenTec mailing list
TenTec at contesting.com
More information about the TenTec