7
Finally, a simple DIY GP antenna design
You can build an inexpensive 1/4 wave antenna from 1 SO-239 chassis mount RF connector and 5 - 3' bronze
welding rods, cut to the proper length. Here is how it looks:
For other aerial designs check our website.
If you have a SWR
meter, leave a bit
longer radiator and
adjust it later by
cutting to achieve
minimum SWR
.
Most designs on the web don't compensate for the fact
that GP aerials are not wideband aerials. Here is a
Freq/element length chart for this simple GP aerial, all
element lengths are in millimeters:
Frequency Radiator - B Radials - A
108MHZ 660
693
104MHz 684
720
100MHz 713
749
90MHz 792
819