CHA F-LOOP
Page 9
8.
Secure the top middle of the Flexible Radiator
Loop to the top middle of the Faraday Loop with
the attached Faraday Loop Strap (o).
9.
Place the CHA F-LOOP on a table top or attach
the Aluminum Base Plate (m) to a tripod or
other antenna mount.
10.
Connect the Coaxial Cable Assembly (l) to the
Coaxial Cable Connection (g) on the back of the
Tuning Capacitor Box.
11.
Perform an operational test (see procedure
below).
12.
This completes installation of the Standard CHA
F-LOOP Flexible Loop configuration.
High Efficiency Loop Assembly
The High Efficiency Loop configuration requires the purchase of the optional high-efficiency collapsible aluminum
tubing radiator loop.
The high-efficiency radiator loop increases performance of the CHA F-LOOP Antenna,
particularly on 40 through 20 meters. The CHA F-LOOP antenna should be installed near the radio set; either
indoors or in a sheltered outside area, such as a balcony or porch. Because the magnetic component of an
electromagnetic wave is maximum at the boundary between the ground and the space above, loop performance is
usually best when the loop is located near the ground at a distance outside of the loop’s close-in induction field
(just a loop diameter or two). The CHA F-LOOP is not waterproof and must be installed in an area protected from
the weather. Do not use an antenna tuner or coupler with this antenna, as it may cause you to mistune the
antenna.
Perform the following steps to assemble the High-Efficiency Loop Antenna, see plates (4) and (5).
1.
Select a location to setup the CHA F-LOOP
antenna. The location can be indoors or in an
outdoors area protected from the weather.
The location must facilitate accessibility by
the operator to the Tuning Knob (h). The
operator needs to be able to adjust the
Tuning Knob while listening to the receiver,
activating the transmitter, and observing the
SWR meter. If used indoors, the location
should also be reasonably away from
switching power supplies, Internet routers,
and other sources of electrical and electronic
interference.
2.
Remove the CHA F-LOOP components from
the Portable Bag (n).
3.
Connect one of the lower loop tubing sections
to one side of the Tuning Unit (a) by inserting
a hex bolt through the curved side of the
tubing section end fitting. Then position the
flat edge of the tubing section end fitting
against front of the bracket on the side of the
Tuning Unit and push the hex bolt through the
hole in the bracket. Place a flat washer on
the hex bolt on the back of the bracket. Place
a wing nut on the end of hex bolt and tighten
securely (finger tight). See Plate (5).
4.
Attached the other lower tubing section to
the other side of the Tuning Unit as in step
(3). The Flexible Radiator Loop Connections
(f) are not used in this configuration.
5.
Attach the top tubing section of the loop to
the top ends of the two lower tubing sections,
from steps (3) and (4). Inserting a knurled bolt
through the round side of one of the bottom
tubing sections, placing the hole in the end
fitting of one end of the top section over the
knurled bolt on the flat side of the lower
tubing section. Place a flat washer over the
end of the knurled bolt. Place a wing nut on
the end of the knurled bolt and tighten
securely (finger tight). Repeat for the other
side of the top tubing section. See Plate (5).
6.
Secure Faraday Loop (c) top the top middle of
the upper tubing section using the Faraday
Loop Strap (o).