RESONANT RADIAL LENGTHS
AMATEUR BAND
WIRE LENGTH
SWL BAND
WIRE LENGTH
(METERS)
U.S.
METRIC
(METERS)
U.S.
METRIC
41/40
34'2"
10.41 m
31
25'1"
7.65 m
30
23'9"
7.24 m
22
17'10"
5.43 m
20
17'1"
5.21 m
19
16'0"
4.87 m
17
13'8"
4.17 m
16
13' 10"
4.23 m
15
11
,
111
,
3.63 m
13
11'5"
3.47 m
12
10'3"
3.12 m
11
9'7"
2.92 m
10
9' 1"
2.77 m
Table 3
Resonant Radial Lengths
NOTE:
The radial wire lengths may be adjusted longer or
shorter to fine-tune the resonant frequency on each
band
Figure 15
Roof Mounted Radial System