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This antenna is directional. Signal strength is maximum
when the antenna is at a right-angle (broadside) to the
desired signal and the frequency for which the antenna is
cut. lt must be used with a 7 5-ohm coaxial feeder.
(See Fig. 1-2)
•
lnverted V Antenna
This is a modified doublet antenna, designed to be installed
on a single pole or support. The characteristics of this
antenna are almost the same as those of a doublet.· The
overall length "L" is a little more than that of a doublet. and
is computed thus:
148
486
L(m)
=
Freq (MHz)
L (feet)
=
Freq (MHz)
(See Fig. 1-3)
• Multiband Antenna
This antenna uses more than one doublet for multiband
reception. The overall length "L" is the same as that of
the doublet. lf the lengths L 1. L2 and L3 are cut for 7 MHz,
14 MHz and 28 MHz, then L 1 is tuned to 21 MHz (3
X -
7MHz). permitting reception on 4 amateur bands 7
~
28
MHz. When used only for reception, this antenna will cover
the 6
~
30 MHz SW bands. (See Fig. 1-4)
• Trap Vertical Antenna
Antennas designed exclusively for BCL are available com-
mercially, or may be built yourself. Antennas designed for
HAM band (3.5
~
28 MHz or 7
~
14 MHz) operation will
provide satisfactory broadcast reception for stations near the
SW bands. Antennas of this type are most suitable for the
listener who does not have enough space for installation of a
doublet or long-wire antenna. (See Fig. 1-5)
• Yagi Antenna
The Yagi antenna is best suited for reception in a specific
band. This antenna features excellent directivity; it provides
high gain and minimizes interfernce when properly installed.
Yagi antennas commercially available are designed only for
HAM band reception. For SW reception, it will be necessary
for you to construct such antennas yourself. (See Fig. 1-6)
• Grounding
Normally. the receiver will operate without being grounded.
However, a good earth ground improves the efficiency of
antennas such as a long-wire. lt also eliminates inductive
noise and protects the operator from electric shocks through
the AC lines.
To ground the receiver. use a copper or brass plate (or net or
rod) connected to a copper wire. and bury it in the ground
about 1
~
7 feet (0.3
~
2.0m) deep. A copper water pipe
(not plastic) may also be used. Never use a gas pipe for
grounding.
lf the receiver cannot be grounded weil. the counterpoise
(antenna radial) would be acceptable.
1.5 SPEAKER
Audiooutput from the R-1000 is 1.5 watts into 8 oh ms. The
R-1000 has a built-in speaker. However, if an external
speaker is desired (such as the KENWOO D S P-100). simply
connect it to the SPEAKER jack of the rear panel. The
speaker may be any good 8 ohm permanent magnet type, 4
inches or iarger.
The internal speaker is disconnected when an external
speaker is used.
1.6 HEAD PHONES
Any low-Z (4
~
16 ohm ) headphones may be used with the
R-1000. Connect the headphones to the front-panei phone
jack.
lf a speaker is connected to the receiver. it will automatically
be disconnected when the headphones are plugged into the
jack.
1.7 POWER REQUIREMENTS
The R-1000 operates from 100/120/220/240 VAC. 50
~
60 Hz. Stability is not affected within 10% of line voltage
variation. due to the built-in regulated power supply.
To change the voltage selector position, refer to Section 4.9.
CAUTION:
Operation of this receiver with a wrang power source may
result in serious demage, and is not covered by the manufac-
turer's warranty.
1.8 CONNECTION
MW ANT Terminal
Connect a high impedance antenna such as a lang wire
antenna for reception of LW or MW signals of less than 2
MHz.
SW B Terminal
Connect a high impedance antenna such as a lang wire
antenna for reception of signals above 2 MHz. The SW ANT
switch should be set to the SW B position.
SW A Terminal
Used for receiving signals above 2 MHz. The antenna feeder
should be a coaxial cable equipped with a UHF connector.
GN D Terminal
lt is recommended that a short, heavy ground lead be con-
nected to the GND terminal (rear panel) to prevent the
posibility of electric shock.
Headphones
Use headphones of 4 to 16 ohm impedance. The optional
HS-4 or HS-5 headphones are best suited for use with the
R-1000. Stereo type headphones can also be used.
External Speaker
Besides the built-in speaker. an external speaker can also be
used (such as the optional SP-100). Connect to the rear
panel EXT SP jack using the supplied plug.
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