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BASE STATION 115V AC
BI-LATERAL LINEAR AMPLIFIER
The Bi-Lateral Amplifier is a precision built, compact amplifier of
advanced design. It uti Iizes an integrated circu it, two tubes, two
transistors and three diodes and a grounded grid, tuned plate
circuit for amplification of AM, FM, CW, and SSB signals in the
25· 54MHz range.
A special feature of the Ampl ifier is the automatic
change over relay which
connections
making it perfect for operation
transceivers not having external amplifier control circuits.
Another feature is that this unit amplifies the received signal) uti-
lizing an integrated
circuit amplifier.
Variable plate tune and load capacitors offer impedance matching
for maximum output to varying antenna loads in the 40-70 ohm
range.
~Ie
Bi-Lateral Ampl ifier has been designed and constructed
~uppress radiation that may cause television interference. TVI
problem has been given full consideration in design and layout of
the chassis.
There are, however, some types of TV! that cannot be prevented
within the amplifier. This is particularly true in weak signal areas.
In such cases, a good commercial low pass filter is recommended.
Height
Width
Depth
Net Weight
Shipping Weight
Construction
Power Requirement
Frequency Range
Types of Emmission .,
Power Output (Slightly less at 50 MHz)
~ Amplification of Received Signal
Drive Requirement to Trigger Antenna Relay
Max Drive (unmodulated carrier)
Odd Order Distortion Products
Harmonic Suppression
ORDER NO.
420
antenna
operates
without
special external
with low power
103/8"
Lightweight aluminum chassis
with rugged steel case
115 V AC
25-54 MHz
AM, FM, CW, SSB, DSB
220 Watts PEP, SSB,
100 Watts
(With 3.5 watts drive)
15 Watts
30 db below peak output
2nd Harmonic at least 35 db
below peak output
INSTALLATION
OPERATION
AFTERBURNER
Rura I Route 3
Lincoln. Nebraska 68505
Input Impedance (unbalanced)
Output Impedance(unbalanced)
Antenna Switching
Tube and Diode Complement
Cable Connector Data
() Carefully
remove the amplifier from the packing carton.
Examine it closely for signs of shipping damage. Remove the four
screws holding the top cabinet and remove all hold-down tape
and packing materials. Check to insure tubes are seated in the
sockets. Install the plate caps on the tubes and the fuse in the
holder. Inspect for any signs of internal damage.
to
Do not attempt to operate your amplifier until you have read
the manual and properly installed the unit.
() The location is not critical but consideration must be given to
adequate ventilation.
() IMPORTANT: Allow at least 4" of clearance on all sides of
the cabinet for good air circulation.
() The primary power connection on the amplifier is a standard
115 V AC line plug.
() The fuse holder is provided on the rear panel with a 3 amp, 3
4 1/8"
AG fuse.
Do not use a larger capacity
7 1/8"
transformer, and power supply will not be protected.
() The unit should be operated with a good ground. Water pipes
11 Lbs.
and other house fixtures are not recommended.
12 Lbs.
() The Bi-Lateral Amplifier will work with the common antenna
systems designed for the 25-54 MHz range provided the antenna
has a resistive input impedance between 40-70 ohms. The SWR
should be kept to a minimum of 2:1 or less.
() The output connector provided is an SO-239. For connection
of your antenna, you will need a PL-259 plug.
3Amp
ON-OFF
Switch
AM-FM
SSB Switch
&
or DSB
XMT-Stanby Switch
20 db
1 Watt
also supplies power to the receive amplifier circuit.
Receiver Amplifier ON-OFF Switch ....
CoPY
&
INSTRUCTIONS
nominal, less than 2: 1 VSWR 25-54 MHz
nominal, Adjustable 40-70 ohms, nonreactive
Automatic provided by RF
2 Transistors, 3 Diodes
require MIL PL-259
Controls 120V AC power to amplifier.
Adjust delay constant of automatic
Activates the automatic antenna
Activates the integrated
circuit receive amplifier.
NOTE: Receive amplifier will only operate when
the XMT-Standby switch is in the XMT position.
50 Ohms
50 Ohms
sensi ng network
2 Tubes
1 Integrated Circuit
Input and Output
fuse or amplifier,
antenna relay.
relay circuit,