Re: [TenTec] using amp to load rain gutter

[Bwana Bob <wb2vuf@qsl.net>]

Yes, that's mucho RF! Any avionics equipment that my company builds for 
a navy appplication has to be tested in a 200 V/m field. These tests are 
done with the equipment (and us) in separate shielded rooms. We don't go 
anywhere near that much RF. Now I would hope that the lobes of the 
search radar antenna patterns are well above the flight deck. Bouncing 
radar off the flight deck would surely result in a lot of multipath and 
false radar images. Still, there must be smaller secondary lobes, and of 
course don't stand in front of any aircraft like A-6E's when their 
radars are on. Don't park the fuel truck there, either!
Our amateur RF radiation is miniscule by comparison!


                73,

                        Bob WB2VUF

Tommy wrote:
> I wonder if I could use the RF exposure calculator to sue the US Navy for
> making me work on the flight deck of aircraft carriers that were running
> some 2 megawatts RF power with their search radar? They did tell us,
> however, that the high power RF field could make one sterile, but they
> forgot to tell us that it takes less RF exposure to kill you than it does to
> make you sterile. :>)
>
> Tommy
>  
> W4BQF
> -----Original Message-----
> From: tentec-bounces@contesting.com [mailto:tentec-bounces@contesting.com]
> On Behalf Of Stuart Rohre
> Sent: Friday, March 25, 2005 2:40 PM
> To: Discussion of Ten-Tec Equipment
> Subject: Re: [TenTec] using amp to load rain gutter
>
> Google "RF Exposure calculator" and you will get the University of TX
> Amateur Radio Club's on line easy fill in the blank calculator for any RF
> exposure.
>
> Plugging in typical values for 500 watts, and assuming various gains for the
> antenna shows a dipole equivalent rain gutter would not be in compliance for
> either controlled or uncontrolled exposure.  You would have to keep people a
> 28 feet from the gutter to avoid too much RF exposure.  Now, the problem is
> greater at high frequency, and that case was run for 10m.
>
> But, it points up the risk of having something like a vertical downspout
> that is usually not protected from humans, being your antenna, at any medium
> power.
> -Stuart
> K5KVH
>
>
>
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