W3DZZ may be used at 160, 80, 40 and 10 meter Band. For the times
of low solar activity those ones are that live bands. Figure 1 shows design of the antenna.
The antenna needs a free space in 67 meters to hang it up. Antenna
may be fed through a 50 or 75 Ohm coaxial cable.
For the antenna you need to use
a resonant tank for 3.580 kHz. The inductor of the tank was wound
on the form of diameter of 25- mm (or 1 inch), the inductor contains
38 turns of wires in dia of 1.0- mm
(18 AWG). It was used a length of plastic water pipe for the form.
Capacitor of the tank made of four capacitors in 470- pF x 500V
that were connected in serial. The capacitors were placed inside
of the plastic tube- the form of the resonant tank inductor.
Then the tube was filled by a waterproof hermetic. The capacitors
are placed on to a PCB.
antenna was hanged up between two nine stories building. Antenna
was fed by a 75- Ohm coaxial cable in 45 meter length. The antenna
had SWR 1.5:1 at 1840- MHz and at 3580 kHz. Antenna had SWR not
more then 2:1 at 7.1 and 28.0- 28.7- MHz.
frequency of the LC Tank (measured by GDO) was 3580 kHz.
73! de UA3DJG