Table 9.2--Typical RF Field Strengths Near Amateur Radio Antennas
A sampling of values as measured by the Federal Communications Commission and Environmental Protection Agency, 1990
Antenna Type Freq Power E Location
Field
(MHz) (W) (V/m)
Dipole in attic 14.15 100 7-100 In home
Discone in attic 146.5 250 10-27 In home
Half sloper 21.5 1000 50 1 m from base
Dipole at 7-13 ft 7.14 120 8-150 1-2 m from
earth
Vertical 3.8 800 180 0.5 m from base
5-element Yagi at 21.2 1000 10-20 In shack
60 ft
14 12 m from base
3-element Yagi at 28.5 425 8-12 12 m from base
25 ft
Inverted V at 7.23 1400 5-27 Below antenna
22-46 ft
Vertical on roof 14.11 140 6-9 In house
35-100 At antenna
tuner
Whip on auto roof 146.5 100 22-75 2 m from
antenna
15-30 In vehicle
90 Rear seat
5-element Yagi at 50.1 500 37-50 10 m from
20 ft antenna




