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Fabrication
Debugging Problems
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| Inspect the bottom of the antenna for splinted fiberglass.
Find the area where the splintering stops and mark it with a pencil.
This mark needs to be a minimum of 2.5" from the end of the wire break, so
when you have trimmed back bad fiberglass the internal antenna wires will be at least 2.5"
long. Use a hack saw and carefully saw the antenna shaft around the
circumference at the pencil mark, making sure you don't saw the internal wire. If you
nick the wire you'll have to chop off the antenna at that point and start over. |
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| After you cut around the circumference, use a knife or a
wood chisel and peel and break off layers of the fiberglass. Do
not try to break off too much at a time, take off about .025" thick of layer
at a time. Once you lift a
layer at the end of the antenna with a chisel, the fiberglass strand should
easily break off at the hacksaw cut.
After you peel and break off the first layer, continue to hacksaw the
antenna circumference again, a little deeper, little by little. Then peel
off another layer using the chisel. DO NOT get in a hurry at this
point. Patience is important to avoid cutting the wire with the
hacksaw. It usually takes about 3 layers of fiberglass removal.
A chisel works best if you have one, it's quicker and safer than a
knife. Use a hammer to chisel the fiberglass layers from the end of the
antenna, little by little, ~.025" thick at a time. |
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| Once you get close the center of the antenna you'll be able
to peel off the last layers of fiberglass. If you haven't nicked the
wire at this point you're home free. Carefully continue removing the
fiberglass until it looks like the picture below, right.. |
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| At this point you should have a twin lead wire that's at
least 2.5" long. If it's longer, cut the wire pair to exactly
2.5" long. Separate the wires, going up about 1" up so the wires look like a Y.
Next, you'll need to determine which wire is the ground wire and
which one is the center (hot) wire. Strip .25" insulation
of each wire. Use an ohm meter to
do this. It's easiest to do a continuity test on the light bulb socket
shell, which is the chrome piece at the top of the antenna. When you
find the wire that has continuity to the light socket shell, that's your
ground wire.
After you determine which one is ground, cut the other
wire (the center wire, or hot wire) so it's .25" shorter than the
ground wire. Then strip off .25" of insulation from center wire.
Recap: The center wire should be .25" shorter than the
ground wire. Both wires should have about .25" of insulation
stripped off. The ground wire needs to be longer to reach the threads
of the jack, allowing it to be pinched between the treads and the wall of
the base. |
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| Insert the antenna into the base with no glue, allowing the
wires to hang out like shown. The center wire will be .25"
shorter than the ground wire. Using a solder gun, tin the
center wire with a little solder to get it ready to solder to the new
RCA connector. DO NOT tin the ground wire, leave that
wire
bare. The ground wire strands will need to flatten out when
pinched in the .25" base hole with the RCA jack threads. |
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