David,
Measured 3 to 7 V/m around and inside a building that is within 200-300 feet
of the 10KW AM station's three towers. The towers are phased and the
amplitude you measure will change based upon time of day as the station
changes that phasing.
Amplitude is greatly affected by materials, metal, etc. where you take your
readings.
The distortion to the field is incredible around large metal objects (as one
would expect) and can get over 20 V/m in those cases. In this case it was
near a 4 foot by 6 foot by 5 foot antique safe in the middle of the
building.
The amplitude should drop off as the square of the distance (yeah, sure)
from the antennas.
- Robert -
PS Many stations will ask their engineers to come out and make measurements
for you at no charge for good public relations.
PPS: These measurements were taken in Aptos, California around the three
towers for the commercial AM station along Highway 1 (sorry can't remember
the call numbers, or exact frequency) If really important, could look for
the old report.
-----Original Message-----
From: David Monreal <[email protected]>
To: [email protected] <[email protected]>
Date: Tuesday, January 11, 2000 3:24 AM
Subject: Radiation levels.
Hi all!
Could anyone tell me the radiation levels (V/m) generated by broadcast
antennae? (Radio and TV). I also need the radiation levels for any other
emmitig devices, machinery, GSM antennae, etc. The more information the
better.
Thanks a lot :-)
David - The V/m guy
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