HexBeam, Part 2 - KG4JJH

HexBeam Antenna
SWR tests made with the antenna hub at 19 feet revealed that the resonant frequencies
decreased, so it appears that I got it backwards. The average error is about 1.5%, and,
although the SWR is acceptable on all bands, I plan to trim the elements and spacers.
G3TXQ’s model includes ¾-inch diameter segments to represent the small terminal
blocks he used to connect the wires to the spacers. I used ring terminals with a
maximum diameter of ¼-inch instead of the terminal blocks. Adding the ring terminals to
my model has a slight affect on the resonant frequency but not enough to explain this
much error.
Allen Baker, KG4JJH
Email: kg4jjh@arrl.net
20M
2.0
1.9
1.8
1.7
1.6
20m
SWR
1.5
1.4
1.3
1.2
1.1
1.0
13.9 14.0 14.1 14.2 14.3
Mhz
18M
2.0
1.9
1.8
1.7
17m
SWR
1.6
1.5
1.4
1.3
1.2
1.1
1.0
17.7 17.8 17.9 18.0 18.1
Mhz
Allen Baker, KG4JJH HexBeam Antenna Page 1 of 2

15M
2.0
1.9
1.8
1.7
15m
SWR
1.6
1.5
1.4
1.3
1.2
1.1
1.0
20.7 20.8 20.9 21.0 21.1 21.2 21.3 21.4
Mhz
12M
2.0
1.9
1.8
1.7
12m
SWR
1.6
1.5
1.4
1.3
1.2
1.1
1.0
24.4 24.5 24.6 24.7 24.8 24.9
Mhz
10M
2.0
1.9
1.8
1.7
10m
SWR
1.6
1.5
1.4
1.3
1.2
1.1
1.0
27.7 27.8 27.9 28.0 28.1 28.2 28.3 28.4 28.5 28.6 28.7 28.8 28.9 29.0
Mhz
Allen Baker, KG4JJH HexBeam Antenna Page 2 of 2