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16. Thread the coax back up through the
other hole shown. There should be about
3 1/2" (9cm) before the end.
17. Using the choke (large ferrite bead
with two holes large enough for coax),
loosely thread the coax up through one
side and then back down through the
other. There should now be less than an
inch (2 1/2cm) of spare wire left over.
18. Solder the center lead into the hole
shown directly below the choke.
19. Solder the shield conductors to the
other hole shown. Be careful to not use
too much heat as it will melt the center
insulation causing the coax to short out.
20. Before continuing, use an ohmmeter
on the 100 ohm to 1000 ohm scale, and
make sure that the resistance from the
center lead to the shield of the coax
registers as an open circuit. If it does
not, you will have to redo your coax
ends. Testing this with the balun
installed will not work, so make sure to
test this first before doing the next step.
21. Install the pre-wound ferrite balun as
shown. The twisted pair of wires is
inserted in the center hole while either
other wire is soldered in the side holes.
22. Strap down the balun using the
remaining piece of bus wire.
Now we are finished with the actual antenna
assembly. If we were to hook it up now we
would have a working unit, but first we are
going to install the unit into the PVC pipe to
keep things together.
TM100 Page 10
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