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SYSTEM GROUNDING
To ensure the best reception, always
connect a ground wire to the externai
antenna jack. Connect the single wire
lead-in to the center terminal of the
RCA
plug. Connect.a suitable earth
ground
to
the outer terminal of the plug.
A suitable earth ground
can
be
a clamp
around a metal water pipe or a copper
rod
driven several feet into the earth.
Radio Shack seils a copper ground
rod
(Cal.
No.
15-530) and the appropriate
hardware.
BAND ALLOCATION
To avoid interference and confusion,
certain portions of the radio spectrum
have been set aside for specific pur-
poses. Perhaps the most familiar exam-
ple is 540 - 1600 kHz, the standard
AM
broadcast band.
Ham radio operators use the foilowing
bands:
Note that broadcasts and hams share
7,100
-7,300
kHz, and interference is
heavy
in
that range.
Broadcasts
in
tropical regions have
special bands set aside for them.
In
such areas shortwave
is
the only way
to reach isolated locations:
EXT.ANT·
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GROUND
160 meters = 1,800 - 2,000 kHz
80 meters
= 3,500 - 4,000 kHz
40
meters = 7,000 - 7,300 kHz
20 meters
= 14,000 - 14,350 kHz
15 meters
= 21,000 - 21,450 kHz
10
meters = 28,000 - 29,700 kHz
International broadcasting stations have
several bands set aside for them:
49
meters = 5,800 - 6,200 kHz
41
meters 7,100 - 7,500 kHz
31
meters = 9,500 - 9,900 kHz
25 meters
= 11,650 - 12,050 kHz
19
meters = 15,100 - 15,600 kHz
16
meters = 17,550 - 17,900 kHz
13
meters = 21,450 - 21,850 kHz
11
meters = 25,600 - 26,100 kHz
120 meters
= 2,300 - 2,500 kHz
90 meters
= 3,200 - 3,400 kHz
75
meters = 3,900 - 4,000 kHz
60 meters
= 4,750 - 5,060 kHz
The rest of the shortwave range is filled
with marine, aeronautical and military
stations. Such stations usuaily use
either SSB or CW, and can be found
outside the amateur and broadcast
bands.
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