The resistor leaks
the static from antenna wire to the ground. Antenna and ground
wire went into the box from the down side. The wires had knot
on it inside the box. The knot did allow the wires go off the box.
Two ventilation holes (for removing condensed water) were drilled
at the down side of the box.
Connection Box was
placed on the fence at South – East side. So the most part of
the day the box was shined by the Sun. At the autumn I discovered
that tabs at the cover had cracks at the bending. The tags went
away from the cover when this one was opened. Picture 6 shows the cover with cracked retaining
tags. Take attention that one retaining tag had cutoff (the cutoff
is near antenna socket). It was happened in 1.5 years from the
antenna installation. However I had a spare cover to fix the box.
Picture 6 Cover with cracked retaining tags
Picture 5 Coaxial Cable going into my Basement
Tuning the antenna to resonance is a simple matter.
Connect an antenna analyzer
(I use to a MFJ- 259B) to the antenna terminal (ground of the
coaxial cable should be connected with antenna) or (that is better)
to end of the coaxial cable going from the antenna. Measure the
resonance frequency. The frequency
would be lower the 7.0- MHz. Then do shortening of the antenna
wire from the left side. I do not recommend cut the wire, just
fold it like it is shown at Figure 5.
I got antenna impedance 75- 85- Ohm (at zero reactance)
at 7.0- 7.350- kHz. The data is practically matched with data
obtained from Antenna Simulator EZNEC for MMANA. The antenna should
be simulated by this software. In spite of the antenna impedance
is not strictly 50- Ohm at the 40- meter Band the antenna could
match with my IC- 718 and K-1 without any ATU.