By: KA5WNX
End Fire Feed Quad Group Antenna System
The Four Square Vertical Antenna
While few amateurs attempt this antenna design, the four-square antenna lends itself to great DXing during propagation conditions.
It yields both a low lobe like that of the 5/8th wave antenna, and a higher lobe much like the 3/4 wave antenna.
Combined it is said to be among the best for cutting though congested traffic during contesting WAS and WAC.
It yields both a low lobe like that of the 5/8th wave antenna, and a higher lobe much like the 3/4 wave antenna.
Combined it is said to be among the best for cutting though congested traffic during contesting WAS and WAC.
Transmatch for Antennas
With proper system design, an antenna tuner or transmatch can allow a non-resonant antenna to operate nearly as efficiently as one that is carefully cut to resonance.
Also, Ham Radio bands such as 10, 12, 15, and 20 meters can be achieved by using a Transmatch or antenna tuner with just a single band antenna such as 20 meters.
More Antenna Fun & Tricks
20 Meters
10 Meters
To Set
Now you can use a set of 20 Meter verticals in the back and 10 Meter verticals in the front. The use of the Transmatch allows you to obtain 1.5 to 1 or lower SWR's across all bands.
This also allows for you to work the 12 meter and 15 meter bands with some amazing results.
This also allows for you to work the 12 meter and 15 meter bands with some amazing results.
Coax Lengths:(492 * VF) / frequency in MHz of the lowest frequency used for half wave.
Example: (492 * .VF) /21.30 MHz = 22' - 10"
VF = Velocity Factor of Coax Cable.
Example: (492 * .VF) /21.30 MHz = 22' - 10"
VF = Velocity Factor of Coax Cable.
Formula: 234/Frequency in MHz.
234/Frequency in MHz for both vertical and horizontal elements.
To get the inches instead of a decimal point, just subtract the feet, and multiply 12 times what is left to get the decimal point left over.
Formula for Coax Lengths: (246* velocity factor of coax) / frequency in MHz yields the length of coax.
234/Frequency in MHz for both vertical and horizontal elements.
To get the inches instead of a decimal point, just subtract the feet, and multiply 12 times what is left to get the decimal point left over.
Formula for Coax Lengths: (246* velocity factor of coax) / frequency in MHz yields the length of coax.
