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Vertical antenna loading coil
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Multiband antenna loading coil,
Print the coil standing, with the SO-239 hole at the bottom.
The pole mounts is printed laying down, print 2 at once.
Coil is wound with aluminum fence wire, crimped terminals.
a radiator length of 5m / 16.5ft will work on 60m, 40, 30 and 20m.
Longer radiator will tune lower freq.
Hardware needed:
3 banana jacks, see link below
https://www.peconnectors.com/test-clips-hooks-plugs-jacks/hws16371/
or you could also use M6 / 1/4 bolts instead, with double nuts to hold antenna wires.
M3 screw, nut and washers.
Crimp connectors, 2 with 3mm hole, 4 with 6mm hole.
1 SO239.
4 self tapping screws to hold the SO239 (3mm wood screws was used on this).
Wire for the coil, I used aluminum fence wire.
2 pieces of wire, one to short turns, one to connect the start of the coil to
the center pin of the SO239.
Gator clip to short turns.
A piece of copper wire as ground bus.
The start of the winding is attached to the coil using a 3mm crimp connector
Print the coil standing, with the SO-239 hole at the bottom.
The pole mounts is printed laying down, print 2 at once.
Coil is wound with aluminum fence wire, crimped terminals.
a radiator length of 5m / 16.5ft will work on 60m, 40, 30 and 20m.
Longer radiator will tune lower freq.
Hardware needed:
3 banana jacks, see link below
https://www.peconnectors.com/test-clips-hooks-plugs-jacks/hws16371/
or you could also use M6 / 1/4 bolts instead, with double nuts to hold antenna wires.
M3 screw, nut and washers.
Crimp connectors, 2 with 3mm hole, 4 with 6mm hole.
1 SO239.
4 self tapping screws to hold the SO239 (3mm wood screws was used on this).
Wire for the coil, I used aluminum fence wire.
2 pieces of wire, one to short turns, one to connect the start of the coil to
the center pin of the SO239.
Gator clip to short turns.
A piece of copper wire as ground bus.
The start of the winding is attached to the coil using a 3mm crimp connector
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