5
A simple folded dipole antenna
A simple folded dipole for connection to the balanced input
can be easily made from flat twin-lead with an impedance of
240 to 300 ohms, A 135 cm (53") piece of antenna lead
should be used for the loop. Strip off approximately 1 cm
(1/2'')
of insulation at each end and solder as shown. Cut one
of the wires in the middle of the loop and connect another
twin-lead to act as feeder to the input. Solder as shown.
This antenna can be used indoors or outdoors. When used
outdoors the solder joints should be protected against the
weather and the loop can be f i x e d to a flat wooden board.
When used indoors the loop can be fixed to any convenient
non-metalic structure or a flat wooden board. The important
requirement in all cases is that the loop should be firmly
fixed, horizontal, and straight.
To obtain good reception the loop should be approximately
at right angles to the transmitter (see diagram) although the
best orientation may have to be found experimentally.
Typical multi-element antenna
The diagram shows a typical multi-element antenna for use
where receiving conditions are doubtful. This type of
antenna will provide typi-cally 6 dB more gain compared
with a folded di po l e (the antenna signal fed to the receiver
is doubled).
Many types of multi-element arrays are available and some
can even be rotated every time you tune in to a different
s t at i o n . Your dealer will ad vi se you or you can buy
specialist literature and become an expert yourself.
Summary of Contents for TR-2075
Page 1: ......
