Figure 03 (drawn by I.G. by Reference 1) shows the grounding
installed in the soil. It was a copper tube with holes filled
by so name “silitit” (Russian hams
at such grounding used instead the “silitit”
a charcoal). Bunch of copper wires went down the tube. So, the
grounding looks like a Broom Antenna reversed by the wires bunch
to the ground. At advertise of the company was wrote: “…. Above the advantages of easy in the installation
the antenna has advantages in the reception”. Last phrase was
puzzled me, what are the advantages?
As usual BA
antenna is considered as wire antennas with a capacitive load.
Capacitive load made like a metal sheet was used by Hertz and
Popov , capacitive loads made like
several wires at the antenna end was used by Marconi ,
loads made like wire’s toroid was used by Tesla . However, no one used a capacitive load made
like a broom because it is not optimal implementation of this
Circle (having dimension like a broom antenna)
with several radial wires will have the same capacity like the
broom antenna. Figure 2 shows a broom converted
to an optimal capacitive load. At some description of the BA
I found recommendation to use a strictly numbers of wires (19,
37 or 61 pieces) with length 50- 100 centimeters
and use angle between center line and wires from 45 to
90 degree. Of course, it is nonsense.
In theory 7 wires are enough for the antenna. BA made
from 19- 37- 61 wires will have only a slightly more capacity
compare to antenna made from 7 wires….