News from the Sterling Park Amateur Radio Club (SPARC)

The SPARC web site is at http://www.qsl.net/sterling.

Wednesday, November 18, 2009

RF Safety in and around Ham Antennas

Hi, Bud, W4KSN, emails:

This evening on the SPARC 6 Meter Round Table we touched on RF Safety Compliance for Amateur Radio Stations.

Section 97.13c of the FCC Rules state:

(c) Before causing or allowing an amateur station to transmit from any place where the operation of the station could cause human exposure to RF electromagnetic field levels in excess of those allowed under § 1.1310 of this chapter, the licensee is required to take certain actions.

(1) The licensee must perform the routine RF environmental evaluation prescribed by § 1.1307(b) of this chapter, if the power of the licensee's station exceeds the limits given in the following table:

Wavelength Band	Evaluation Required if Power* (watts) Exceeds:
MF
160m	500
HF
80m	500
75m	500
40m	500
30m	425
20m	225
17m	125
15m	100
12m	75
10m	50
VHF (all bands)	50
UHF
70cm	70
33cm	150
23cm	200
13cm	250
SHF (all bands)	250
EHF (all bands)	250
Repeater stations (all bands)	non-building-mounted antennas: height above ground level to lowest point of antenna <>and power > 500 W ERP building-mounted antennas: power > 500 W ERP

Most of us exceed these power levels at some time in our operations so it in order to maintain compliance you should proceed with an RF Environmental Evaluation of your station, it is very easy.

On your web enabled PC browse to;

http://www.dxzone.com/cgi-bin/dir/jump2.cgi?ID=11352

And follow the simple directions for each band your station operates on. Print out each completed study, staple them together and place them in a safe file drawer in your shack, that is all there is to it.

The FCC does not fool around with RF Exposure; it is taken very seriously in broadcast and other commercial services. All it would take is one neighbor filing a complaint against your station regarding RF Exposure and I am sure you would receive a letter from the local FCC office.

If you have any questions or need some help drop an e-mail.

Bud, w4ksn

posted by SPARC'ie # 8:53 PM

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