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15
REAR PANEL DESCRIPTION
1. ANTENNA 1 - This connector is used when attaching
receiving antennas with coaxial feed lines of 50 Ohm
nominal impedance. It accepts a standard PL-259 plug. If
selected by the 'Shortwave Antenna Select' switch (item 2),
this input operates for the AM Broadcast and Shortwave
bands only (100 kHz to 30 MHz).
2. SHORTWAVE ANTENNA SELECT - This switch selects
one of three possible antenna systems to be used for the
100 kHz to 30 MHz antenna input. Positions 1 and 2 select
ANTENNA 1 and ANTENNA 2 respectively, which are
described in items 1 and 5 on this section. When WHIP is
selected, the built in whip antenna, located at the rear right-
hand corner of the receiver's top, is connected. Also built
into the receiver is a ferrite rod antenna which also operates
when this switch is in the WHIP position, AND the receiver is
tuned between 100 kHz and 1800 kHz.
3. FM/AIR ANTENNA SELECT - This switch allows
selection of either the built-in WHIP antenna, or an
external 75 Ohm antenna connected at the FM/AIR
terminal (item 4) for the 87 - 108 MHz and 118 - 137 MHz
frequency ranges.
4. FM/AIR Antenna - This "F" type input is designed for an
unbalanced 75 Ohm input connection that is encountered
with coaxial feeds. Connect to the FM connection of a
TV/FM outdoor antenna feed (splitter), if available. Folded
dipoles or coaxial antennas will also provide good results
with this input for reception of the FM broadcast and Aircraft
Bands. If selected by the 'FM/AIR Antenna Select' switch
(Item 3), this input operates for the FM Broadcast (87 - 108
MHz) and Aircraft (118 kHz to 137 MHz) bands only.
5. ANTENNA 2 -This connector can be used to attach a
high impedance (500 Ohm nominal) antenna. Use the
'GND' (black) and '500 Ohm' (red) terminals for a 500
Ohm antenna. If selected by the 'Shortwave Antenna Select'
switch (Item 2), this input operates for the AM Broadcast and
Shortwave (100 kHz to 30 MHz) bands only.
6. LINE AUDIO OUT -These RCA connectors provide
constant low level left and right audio sources that are
independent of the front panel VOLUME, TREBLE and
BASS control settings. They are designed to interface to a
tape recorder, CW/RTTY demodulators, stereo amplifiers,
etc.
7. Battery Compartment - This compartment houses 6 IEC-
LR20 or IEC R20 or 'D' cells to provide 9 VDC to the
receiver for portable operation. To gain access to the battery
compartment, press the corrugated area of the battery
compartment panel and slide it to the left. Then gently pull
the panel from the receiver. To replace the cover, simply
reverse this process.
8. EXT DC INPUT - Connect the AC ADAPTER output
cable to this connector. The receiver requires 9 VDC
power at approximately 1 Amp current. With external DC
power applied, the internal batteries are not used.
9. EXTERNAL SPEAKER - This connector accepts a
standard 1/4" diameter, 3 circuit, (stereo) phone plug for
connection of external 4 to 8 Ohm speakers.
10. WHIP ANTENNA - The receiver has a built-in
telescoping antenna that can be used on all bands.
Note that the pivot point section of the antenna must be
exposed out of its nesting tube to permit moving the
antenna from its vertical orientation. Extend the
telescoping sections and position the antenna for best signal
reception. Be sure the corresponding rear panel antenna
select switch is set to the 'WHIP' position for WHIP antenna
reception.