Specifications

SMARTUNER MANUAL 17
SGC Inc. SGC Building, 13737 S.E. 26th St. Bellevue, WA. 98005 USA
© Nov2000 SGC, Inc. P.O. Box 3526, 98009 Fax: [phone] Tel: [phone]
E-Mail: [e-mail] Web Site: www.sgcworld.com
Coupler
7 to 25 meters
1 meter
3 meters
Hot
GND
E66 insulators
(x8)
3 meters
Base Dipole Installation
RF Cable
DC Supply Line
Figure 4.5.8 Base Quadra Loop Horizontal
Base Quadra
Loop Horizontal
Porcelain
isolators
with tie rope
Ground
bolt
terminal
Antenna
terminal
Radiation
50 ohm
coax from
transmitter
Coupler
The horizontal quad loop is a groundless antenna for high angle radiation and is ideal
for HF communications up to 500 miles in the frequency range of 2 to 10 MHz. This
configuration provides optimum near-right angle reflection to the ionosphere for short-
range communications.
A square base can be from 8 to 15 meters long and can be configured to the shape of the
structure as necessary, to provide the best arrangement. The height of the supporting
poles should be 20 to 40 feet. Supporting poles should be as tall as possible to provide
the antenna with the greatest isolation from industrial noise generated by the building,
such as fluorescent lights and electrical motors. Loop antennas are also less susceptible
to industrial RF noise generated by the building, because they are isolated from the
ground system of the building.
Loop wires are attached at one end on the high voltage active side of the coupler and on
the other end at the ground side of the coupler.
Figure 4.5.9 Base Delta Loop