To allow adjusting the coil turns, attach this end as shown in the photo.
This is temporary to allow removing turns if necessary to optimize the
coil.
Coil Optimization
Optimizing the coil is done by assembling the antenna, and checking with an antenna analyzer or
SWR bridge. The coil should be adjusted so that the whip has approximately one half section
collapsed at the low frequency end of the band. This can be done after the antenna assembly is
complete and ready for testing.
This is how a compact coil looks when completed.
This coil is wound for 30 meters.
A complete set of coils for 40, 30, 20, and 17M
Note in the photos of the entire coil set how the wires pass into the form on one
side and along the form on the opposite side to secure the coils. From one side
you should have the coil ends disappearing into the coil form and from the
other, the wires emerge, lie along the coil form and re-enter at hole set A, pass
through and connect at the solder lugs. If using the inner hole sets, you can loop
the wire back and forth through the unused hole sets to prevent a long run down
the coil form on one side.
Secure the terminal and fold the wire down to lie flat along the terminal.
Once compete, check the end-to-end resistance of the coil using an ohmmeter. It should be no
more than one or two ohms or less for any of the coils. If a higher resistance value is noted,
recheck the tightness of the screws and that the solder joint and loop make good contact.
PAC-12 Multi-band Coil Kit
Assembly
The PAC-12 multi-band coil kit is designed to replace a fixed
coil in the antenna system to provide continuous tuning from
40 meters through 10 meters. The coil kit is wound with tinned
copper wire and has a tap lead to adjust the effective inductance and tune the resonant frequency
of the antenna system.
PAC12_Manual
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