A SIMPLE TWO METRE PORTABLE BEAM
BY AL AKERS ZS2U
For those who, for whatever reason, do not wish to make an
elaborate beam, especially for portable use, this simple beam was developed.
The diagram shows all dimensions and, as can be seen, there are no matching
arrangements.
The one I built made use of 20mm electrical PVC fittings, i.e. a tee-piece,
two couplings, two 160mm lengths
of pipe and another short length of pipe which plugs into the teepiece and
is used to fasten the beam on a mast.
The elements are mounted in the two couplings which plug onto the two short
lengths of tubing and these, in turn, plug
into the tee-piece. Elements are made from 3mm brazing rod.
Measured SWR on this antenna is 1,3:1.
The antenna was on show at the February 2004 PEARS meeting,
and
any questions can be directed to :
Al Akers ZS2U
53 Clarence Street
Westering
Port Elizabeth
South Africa