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Feedline Connections
The DXE-UN-43 UNUN is attached to the feedline antenna connection using one 6” wire with ring
terminals and one 7” wire with ring terminals. Connect the 6” wire with terminals from the antenna
feedpoint located on the antenna element to the terminal on the DXE-UN-43 UNUN closest to the
Red "+" on the label as shown in Figure 18. Do not over tighten the wing nuts. Hand tighten
them only, do not use pliers or other tools to over tighten the wing nuts.
Connect the other 7" wire with ring terminals from the terminal on the DXE-UN-43 UNUN closest
to the Black "▬" on the label to the bolt on the angle plate as shown in Figure 18.
Figure 18
Your coaxial cable from the radio connects direct to the SO-239 connector on the DXE-UN-43
UNUN. Weatherproof this coaxial connection using TES-06132 - Scotch® Super 33+ and TES-
2155 - 3M Temflex™ 2155 Rubber Splicing Tape.
Tuning the Vertical Antenna System
The use of a customer supplied, high quality, wide range outboard tuner is required for any multi-
band trapless vertical antenna system. The tuner should be capable of tuning the wide range of
impedances presented by the antenna and coaxial cable at all the operating frequencies. Tuners of
this type generally have a good quality variable roller inductor and at least one large variable
capacitor for fine tuning.
There are a number of outboard automatic antenna tuners available that are capable of tuning this
type of high performance vertical antenna system.
Tuners which are built into transceivers lack sufficient impedance tuning range for this type of high
performance vertical antenna system.
The actual impedance of the multi-band antenna is affected by local conditions, including proximity
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