User Manual

Radioddity User Manual for CB Radio Antenna v1.0
Page 3 of 4
4.1 Possibility 1 – Use the supplied 2mm Hex Allen key
Together with your antenna you received a small plastic bag (to be found within the
antenna sleeve) that does contain a 2mm Hex Allen key.
1. With that Hex Allen key, loosen the
grub screw that is located at the top
of the large silver coloured spring of
the antenna.
2.
Hex Allen key inserted into the grub screw
3. Now you are able to move the black-
coloured antenna radial in and out of the
silver-coloured base part.
Antenna radial fully pulled out (with even the brass visible)
4. Start with the black part all out but the brass part of the radial not being visible.
5. Measure the SWR and write down that SWR value.
6. Now carefully push back the black-coloured radial just a very little bit into the silver-
coloured part. Again, measure the SWR. As long as the SWR is getting better,
continue by slightly pushing back the black-coloured radial into the silver-coloured
base part. By doing so, you will be able to fine tune the antennas SWR.
7. When the SWR is at its lowest value, use the 2mm hex Allen key and fasten the
grub screw.
4.2 Possibility 2 - Pull off the rubber cover
Another possibility to
shorten/lengthen the antenna is via
the screw at its top end.
1. Carefully pull off
(do not use any
knife or cutter) its
top most rubber
cover (the black
rubber at the top
end of the
antenna, about 4cm in length, it prevents the inner part of the antenna from any
moisture).