Larry's Antennas LLC
KJ7U Antennas Striving for and Achieving Perfection
KJ7U Antennas Striving for and Achieving Perfection
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Base Station Install
This rough drawing is only that. Actual number of wires or lengths are not critical.
Longer is better, and also more wires it better.
The actual antenna is only half of the system, the image plane or radials are the other half.
The center conductor goes to the antenna and the shield of the coax connects directly to
the radial wires. The fewer connections, the less chance of bad connections. In other words,
make the wires one piece each or if splicing, solder connections. All connections will corode
in time, so use conductive never sieze compound on them and also seal with battery protector.
The thumb screw on the antenna connection will only need Never Sieze.
Longer whips can be used for more efficiency on Low bands, but will not then allow
operation on higher bands like 10 meters. I have a 90" whip on my chimney mounted antenna
and works great on all lower bands, but not 10m. To work all bands 6-160, use 72" whip.
The distance from common ground bolt to antenna should be about 3 or 4 inches.
Keep radials up near antenna.
This rough drawing is only that. Actual number of wires or lengths are not critical.
Longer is better, and also more wires it better.
The actual antenna is only half of the system, the image plane or radials are the other half.
The center conductor goes to the antenna and the shield of the coax connects directly to
the radial wires. The fewer connections, the less chance of bad connections. In other words,
make the wires one piece each or if splicing, solder connections. All connections will corode
in time, so use conductive never sieze compound on them and also seal with battery protector.
The thumb screw on the antenna connection will only need Never Sieze.
Longer whips can be used for more efficiency on Low bands, but will not then allow
operation on higher bands like 10 meters. I have a 90" whip on my chimney mounted antenna
and works great on all lower bands, but not 10m. To work all bands 6-160, use 72" whip.
The distance from common ground bolt to antenna should be about 3 or 4 inches.
Keep radials up near antenna.
Check the Arrl handbook for safety issues with antennas.
Here is a drawing showing a basic installation.
