RF (was: RE: E11/WinME results....)

From: ajp166 <ajp166_at_bellatlantic.net>
Date: Thu Feb 15 19:44:07 2001

From: John Allain <John.Allain_at_Donnelley.InfoUSA.Com>
>Q: What Wavelengths and Wattages are known to really
> be dangerous? What is the Frequency of a Microwave
> oven, for example (900 Mhz? <g>). How much less
> dangerous is a signal of 1/2 that, etc... I have
> seen almost nothing scientific written on this subject
> and want to know more.


Microwaves run around 900mhz. That is the majik freq for
really shaking water ions till they warm up.

The key concern is the power/area* time With the threshold
around 900mhz being about 10milliwatts/square inch. The effect
is frequency sensitive where very low frequencies are less
impact then say microwave. the primary damaging effect is
heating either localized or generalized.

I've been burnt by a 20watt UHF (474mhz) twoway radio when
a bozo keyed up while I was working on the antenna. It
punched a nice hole in my finger that took a long time to heal.

cell phones FYI are in the 850mhz range and relatively low power
in the sub .5W range with a low energy density. FYI the average
HAM VHF or UHF portable is usually 2-10 times higher power
output {1 to 5W}. There is some risk, I would consider it low
by any standard I've seen.

Oh, people who drive while talking on cell phones are 4 times
more likely to be involved in an accident. That has been verified.

Allison
Received on Thu Feb 15 2001 - 19:44:07 GMT