Heathkit GR-54 - Antenna Installation (Continued); Dipole Installation Guide

Page 52
teary se arecre
DIPOLE OR INVERTED-V DIPOLE
INSTALLATION
An antenna 100 feet long will give good recep-
tion from 3 to 15 megacycles, with the best
‘= ro
§ megacycles, Use the
manatee lente nee
FCCCPrgch weing nica
following formula if you want to compute the
length of an antenna that will have its best
reception at another frequency.
eer 468
length (feet) = —@ —__——_____.
(feet) frequency (megacycles)
The following material is needed for this
antenna installation:
Antenna - 50 to 100 feet of bare wire,
Lead-in - RG-58AU or RG-174U coaxial
cable, The length depends upon the height
of your antenna and the location of your
Receiver,
Ground wire - Same type as antenna wire,
The length depends upon the distance be-
tween the Receiver and the grounding sur-
face,
Insulators
-
Three,
ceramic
or
glass,
2-1/2"
long,
Ground rod - One 6 or 8 foot length, 3/8"
diameter, An alternate ground method is
to
connect
the
ground
wire
to
the
cold
water
pipe
in
your
house,
Clamp - One for ground rod,
Lightning arrester - One for lead-in cable,
NOTE: For Dipole Installation, refer tosteps 1A
through 12,
For Inverted-V Dipole, refer to steps 1B
through 12,
14, Locate two supports that are fairly high
from the ground and 50 to 100 fost apart,
One support could be your house and the
other a tree, Refer to Figure 6,
LEAD-IN li
ICDAXIAL CABLE]
Figure 6
1B, Locate the supports that are fairly high
off the ground, The center support should be
20 to 100 feet from the ground and both end
supports over 10 feet from the ground, Note
that the angle between the center support
astew;ns utesc chastld hea nvron AR
and the anténna Wires SnowiG be over 45
degrees, Refer to Figure 7,
1
ae al
INSULATOR
INSULATOR
OVER 45 OVER 45
CEGREES DEGREES
SUPPORT SUPPORT
7
{COAXIAL CABLE!
Figure 7
2,
Cut
the
antenna
wire
in
half,
Fasten
one
end
of
one
wire
to
an
insulator,
Then
fasten
one
end
of
the
other
wire
to
the
other
end
of
the
same
insulator,
3,
Fasten
the
remaining
two
insulators
to
the
ends
of
the
antenna
wire,
4,
Prepare
one
end
of
the
lead-in
cable
so
that
you
will
have
a
3"
center
lead
anda
3" shield lead,
5,
Fasten
the
prepared
end
of
the
cable
to
the
center
insulator
(for
support),
Then
solder
the
center
lead
of
the
cable
to
the
antenna
on
one
side
of
the
insulator,
Solder
the
shield
to
the
antenna
on
the
other
side
of
the
insulator,
Refer
to
Figure
8,
ANTENNA
WIRE
A FEW TURNS OF -
WIRE TD HOLD
CABLE TO INSULATOR
Figure 8
6. Use this step for Inverted-V Dipole only.
Fasten the insulator just prepared to the
center support, ,
8 Route the lead-in wire into the house at
your Receiver location,