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 [02], capacitive loads made like
several wires at the antenna end was used by Marconi [02],
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capacitive
loads made like wire's toroid was used by Tesla [02]. However, no one used a capacitive
load made like a broom because it is not optimal implementation
of this one.
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...
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