Date: Fri, 27 Oct 2000 18:42:10 -0600
Reply-To: John Klun <jklun@GJ.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: John Klun <jklun@GJ.NET>
Subject: Re: Al foil protection
Content-Type: text/plain; charset=us-ascii
I'd say the red PTD (shiny side up, of course) would filter out the red spectrum of
light and the gree would filter out christmas trees. I would advise you to ensure
you have at least a 1" shiny aluminum strip between the red and green (to hold them
together)... ;)
Chuck Hill wrote:
> Joel Walker advises us:
> "I wear 2 lbs of aluminum foil (arranged properly in a toroidal hat) on
> my head at all times during the night (when the ozone layer is at its
> lowest point!!). i can tell you that without that aluminum foil i'd be
> receiving those messages in my teeth and brain,......
>
> Joel forgot to mention the most important part of this safeguard:
>
> KEEP THE SHINY SIDE OF THE FOIL UP!!!
>
> If you do this wrong, and make your PTD (Protective Toroidal Device)
> with the dull side of the foil up, the effect is one of concentration,
> instead of reflection/dispersion, leading to dire consequences.
> Absolutely no dull foil must face upwards. KEEP THE SHINY SIDE UP!!
> The PTD offers pretty good protection during periods of low ozone
> protection, but is less satisfactory during daylight hours, the
> reflected/dispersed rays causing discomfort to those you may meet on the
> sidewalk. I have noticed people actually crossing to the other side of
> the street downtown while I've been wearing my PTD during periods of
> "holes in the ozone" during daylight hours. Sometimes during evening
> hours as well, though not so often. People do know about the benefits
> of the use of a PTD, and though you don't see a lot of them in use, I
> notice people pointing and nodding their heads in approval rather often.
>
> I would be interested whether red or green colored foil is more or less
> effective--perhaps someone can report on this to the list.
>
> A PTD is also a good precaution during periods of high sunspot
> activity, though there is some mention in the literature that pyramidal
> shaped devices are just as effective. I notice about the same reduction
> in message reception through the teeth and brain with either one, so I
> just stick with the one PTD. The pyramidal device is rather flimsy,
> also.
>
> Those readers in the southern hemisphere should realize that in their
> case, the dull side should be up. It's reversed, just like the Coreolis
> effect.
>
> Obligatory Vanagon Content: I always keep a PTD in place on the engine
> cover during dangerous periods, and have had no more problems with
> surging, stalling, etc. since using the device.
>
> Chuck Hill
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