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Author Topic: Updated Radio Frequency Exposure Rules Become Effective on May 3:  (Read 518 times)

K7NI

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  • Posts: 84
Re: Updated Radio Frequency Exposure Rules Become Effective on May 3:
« Reply #15 on: May 01, 2021, 06:58:59 PM »

Quote
"isn't their an app for that? (simply plug in wattage, freq, etc. and read out safe distance?)"

Yes, there are several available for free on the Internet. Some are "on-line" calculators and some are programs that you can download and install on your computer. One downloadable is called "RF Safety Calculator".

that was easy, thanks  :) => http://hintlink.com/power_density.php

Unfortunately, that site has at least one serious error which brings its results into question. It says to enter a gain of 2.2 dB for a dipole. That would only be true if the dipole was in free space. Most back yard dipoles will have > 6 dBi of gain or put another way, more than 4 dBd of gain.

- Glenn W9IQ

If you check the box that says "Do you wish to include effects of ground reflections?" it adds about 4 dB to the basic calculation. I have no idea if that's correct or not.
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N9FB

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Re: Updated Radio Frequency Exposure Rules Become Effective on May 3:
« Reply #16 on: May 02, 2021, 06:56:34 AM »

here is an article with calculation formulae:

http://forum.near-fest.com/index.php?topic=1546.msg3570#msg3570

and here is the recommended calculator: http://www.lakewashingtonhamclub.org/resources/rf-exposure-calculator/


source thread:
ATTENTION ALL F.C.C. LICENSED RADIO AMATEURS:
I have posted a short article that distills all the technical, legal and bureaucratic verbiage relative to this matter down to one page explaining it in understandable terms and showing you how to calculate the numbers you will need to keep with your station documents in compliance with F.C.C. Maximum Exposure rules and requirements that now affect ALL radio amateurs.

www.near-fest.com

In reality, when all is said and done, it is merely some technical and legal housekeeping that is easier to perform than it is to explain and describe.

73,

Michael Crestohl, W1RC/VE2XL
New England Amateur Radio Festival, Inc.
aka NEAR-Fest......
Join us for our “Grand Homecoming” 
Friday October 15th and Saturday, October 16th 2021.
« Last Edit: May 02, 2021, 07:00:38 AM by N9FB »
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