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Assembly of DXE-GA40M-1P 40m Kit
The 40m kit includes a custom machined hub, a custom 40m loading coil, six 48" Hot Rodz, a
threaded adapter with a locking nut and an Allen wrench. Protective rubber tips for the end of the
Hot Rodz are also included. The 40m kit is tunable to cover the entire band and offers 100 kHz
of bandwidth at a 1.5:1 SWR. A radial system is recommended for best performance.
Make sure both the 72" and the 24" masts from the base assembly are connected together. The
top coil requires the threaded adapter be used in the top mast section. Install the locking nut on
one end of the adapter and thread the other end into the mast section. Install the loading coil to
the adapter until it bottoms-out into the threads. Do not tighten or force the coil any further. Use
the locking nut to tighten up the coil using limited torque.
Install the Hot Rodz into the hub. Adjust all the Rodz so 2" extends from the center of the hub to
one side of each Rodz as shown in
Figure 9
. Install the hub to the top of the loading coil mast,
using the wider spaced set screws shown in
Figure 8
. Turn the hub so its set screws are on the
opposite side from the two existing set screw holes in the coil mast and tighten with the included
Allen wrench.
The 40m antenna should resonate at approximately 7.0 MHz. Adjustment of the resonant
frequency can be made by adjusting the Hot Rodz length. Shorten the Hot Rodz, (increasing the
Rodz Adjustment Dimension in Figure 9) to resonate the antenna higher in frequency. Once the
desired resonance is achieved, use the base matching coil to reduce the SWR by compressing or
expanding the wire turns on the coil form.
