EMF worries? [RE-wrenches]

[boB Gudgel]

Remember that Solar Energy itself is Electro-Magnetic radiation (RF) 
that hits the earth with an intensity of around 1000 Watts per square 
meter of area. The EMF from semi-nearby RF sources are on the order of 
micro-Watts or milli-Watts per square meter of area, unless you are 
right next to a transmitter antenna... Then it might be a few Watts. 

 You "feel warm" when you are in the sun.  That's the "heating effect"  
PLUS ionizing radiation from the UV spectrum that is present, that can 
actually cause skin cancer if you get too much of it. Can't live with it 
and can't live without it (Vitamin D). The radiation I think you are 
talking about are very low  and have some DNA mutation energy levels 
present (UV).   I'm certainly not worried about it.

If you have "changing" current (AC) in a wire, it produces EMF (RF).  If 
it is DC (not changing current flow) in a wire, it creates magnetic 
fields.   You have to have both, changing electric AND magnetic fields 
together to create radio waves (EMF, RFI, whatever).

Also there is "near field" and "far field" radiation.  When you are 
nearer  to the antenna (or inverter) that is doing the radiating than 
around one wavelength, (the lower the frequency, the longer the 
wavelength), then you are in the "near" field, and the magnetic and the 
electric fields are more predominant.  When you get farther away, like 
93 millions miles from the sun or miles away from a transmitter, then it 
is strictly RF or Electromagnetic Radiation where the magnetic and 
electric portions of the radiation sustain each other and are considered 
as RF energy transmission.

Then there's the recent cell phone concerns that says the problem is not 
the RF itself, but the the hundreds of Hertz modulation effects that can 
cause health problems in your head.  Maybe something to that, I really 
don't know.  If so, it sounds like a near field problem to me.  Probably 
from the electric field part cuz it sure isn't the heating or ionizing 
radiation effects.

My $0.02 for today.


boB Gudgel K7IQ
MidNite/Magnum  Solar/Energy
Washington AC


Wesley Kennedy wrote:
> Howdy Wrenches,
> 
> The subject of con trails got me wondering about another "less than
> mainstream" worry some of our clients and potential clients have
> expressed.  EMF radiation from the inverter.  Apparently "dr" Weil just
> got on Oprah and gloomed and doomed about EMF being the next epidemic.  
> 

> Anyone get the old gauss meter and see how much EMF our inverters are
> radiating?  Any thoughts on how to handle the concern with folks?  Do we
> just back away slowly, murmuring soft cooing noises?
> 
> 
> Any thoughts would be appreciated....
> 
> Wes Kennedy
> 
> Co-Owner
> 
> Service, Design and Installation
> 
> NABCEP and CoSEIA certified PV installer
> 
> Namaste Solar Electric
> 
> [Non-text portions of this message have been removed]
> 


- - - -
Hosted by Home Power magazine

To send a message: RE-wrenches at topica.com

Archive of previous messages: http://lists.topica.com/lists/RE-wrenches/read

List rules & how to change your email address: www.mrsharkey.com/wrenches/etiquette.php

Check out participant bios: www.mrsharkey.com/wrenches/

Moderator: michael.welch at homepower.com
--^----------------------------------------------------------------
This email was sent to: michael.welch at re-wrenches.org

EASY UNSUBSCRIBE click here: http://topica.com/u/?bz8Qcs.bz9JC9.bWljaGFl
Or send an email to: RE-wrenches-unsubscribe at topica.com

For Topica's complete suite of email marketing solutions visit:
http://www.topica.com/?p=TEXFOOTER
--^----------------------------------------------------------------