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From rec.radio.amateur.misc Tue May 25 12:43:41 2021
Xref: utzoo sci.electronics:19519 rec.radio.amateur.misc:1929
Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!caen!sol.ctr.columbia.edu!bronze!bronze.ucs.indiana.edu!stigall
From: stigall@bronze.ucs.indiana.edu (john stigall)
Newsgroups: sci.electronics,rec.radio.amateur.misc
Subject: RF exposure question.
Message-ID: <1991Apr22.175309.8199@bronze.ucs.indiana.edu>
Date: 22 Apr 91 17:53:09 GMT
Sender: stigall@bronze.ucs.indiana.edu (john stigall)
Organization: Indiana University, Bloomington
Lines: 15
With all the recent talk about RF exposure, does anyone have a feel for
how much RF is too much for long term exposure at 525 MHz? What I have
been working on is consulting for a family that lives under a channel 23
T.V. station. Measured signal strength is +50 to +60 dBmv (+60 is 1 volt)
in and around the house and property. This was measured using a folded
dipole cut to frequency, on a Wavetek SAM I meter.
Thanks.
- --
John Stigall - Indiana University Computing Services Network | Waiting for
750 N. State Rd. 46 Bypass, Bloomington, Indiana 47405 | Amateur Radio
(812)855-9255
stigall@ucs.indiana.edu | Callsign...
From rec.radio.amateur.misc Tue May 25 12:43:46 2021
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Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!wuarchive!emory!wa4mei!ke4zv!gary
From: gary@ke4zv.UUCP (Gary Coffman)
Newsgroups: sci.electronics,rec.radio.amateur.misc
Subject: Re: RF exposure question.
Message-ID: <2782@ke4zv.UUCP>
Date: 8 May 91 01:17:58 GMT
References: <1991Apr22.175309.8199@bronze.ucs.indiana.edu>
Reply-To: gary@ke4zv.UUCP (Gary Coffman)
Followup-To: sci.electronics
Organization: Gannett Technologies Group
Lines: 23
In article <
1991Apr22.175309.8199@bronze.ucs.indiana.edu>
stigall@bronze.ucs.indiana.edu (john stigall) writes:
With all the recent talk about RF exposure, does anyone have a feel for
how much RF is too much for long term exposure at 525 MHz? What I have
been working on is consulting for a family that lives under a channel 23
T.V. station. Measured signal strength is +50 to +60 dBmv (+60 is 1 volt)
in and around the house and property. This was measured using a folded
dipole cut to frequency, on a Wavetek SAM I meter.
The OSHA limit is 10 mw/cm^2 and the new ANSI limit is expected to be
1 mw/cm^2. The .0003 mw/cm^2 levels you are measuring are well within
both limits.
In the past, the primary concern has been with RF heating effects in
human tissue, especially the lens of the eye. The levels you are seeing
are completely safe in that respect. Current concerns about long term
exposure to low level RF fields center on the possible genetic effects
caused by the electric field potential across the cell nucleus. These
concerns deal chiefly with very low frequency fields such as the 60
cycle AC power grid. The levels you are measuring are well below the
expected AC field strengths found in typical homes.
Gary KE4ZV
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