All- Metal Antennas are very often used
at VHF. The antennas have advantages compare to some other antenna
designs. All- Metal antennas are easy to make because very often
such antennas are made from one length of a thick strand wire.
For some design of the All- Metal Antennas it is possible to use
metal traverse that is grounded to the main mast. It is conveniently
for design and safety for the lighting strike. Several designs
of the All- Metal Antennas for the 145- MHz Band are described
UA0SNM All- Metal Three
Element Antenna for the 145- MHz Band
Design of the All- Metal Three Element Antenna is shown on the Figure 1. The antenna
may be made of copper tube or stranded aluminum wire. Diameter
of the tube or wire may be 6… 12- mm.
Figure 2 shows mast with HF-Antennas where the All- Metal Three Element Antenna is installed. Figure 3 shows close view of the antenna.
Figure 1 Design of the All- Metal Three Element Antenna