.-AFTERBURNER
ORDER
NO.
419
MOBILE STATION 12V DC
BI-LATERAL
LINEAR AMPLIFIER
INSTAllATION
&
OPERATION
INSTRUCTIONS
AFTERBURNER
Rura I Route 3
Lincoln.
Nebraska
68505
This Bi-Lateral Amplifier is precision built, compact amplifier of
advanced design. It utilizes an integrated circuit, two tubes, four
transistors
and four diodes and a grounded
grid, tuned
plate
circuit for amplication
for AM, FM, CW, and SSB signals in the
25-54 MHz range.
A special feature
of the Amplifier
is the automatic
antenna
change
over
relay
which
operates
without
special
external
connections
making
it perfect
for operation
with low power
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.
~The
Bi-Lateral Amplifier has been designed and constructed
to
suppress 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 TVI 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
4 1/8"
Width
7 1/8"
Depth
103/8"
Net Weight
5 Lbs.
Shipping Weight
8 Lbs.
Construction
Lightweight aluminum chassis
with rugged steel case
Power Requirement
+12-14V DC
15 Amp
Frequency Range
25-54 MHz
Types of Emission
AM, FM, CW, SSB,DSB
Power Output (Slightly less at 50 MHZ)
220 Watts
PEP, SSB, or DSB
.~
100 Watts
(with 3.5 watts drive)
Amplification of Received Signal
20 db
Drive Requirement to Trigger Antenna Relay
1 Watt
Max Drive (unmodulated
carrier)
15 Watts
Odd Order Distortion Products
30 db below peak output
Harmonic Suppression
2nd Harmonic at least
35 db below peak output
Input Impedance (unbalanced)
50 Ohms
nominal, less than 2: 1 VSWR 25-54 MHz
Output Impedance (unbalanced)
50 Ohms
nominal, Adjustable 40-70 ohms, nonreactive
Antenna Switching
Automatic provided by
RF sensing network
Tube and Diode Complement
2 Tubes
4 Transistors, 4 Diodes
1 Integrated Circuit
Cable Connector Data
Input and Output
require MIL PL-259
() Carefully
remove the amplifier
from
the packing
carton.
EX::lmine it closely for signs of sh ipping 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.
The unit is made to operate on negative
ground systems
only. Do not attempt to operate your amplifier until you have
read the manual and properly installed t he 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 the +12V
DC terminal on the rear panel.
() The fuse holder is provided on the hookup cable with a 20
amp
fuse.
Do not
use a larger capacity
fuse
or
amplifier,
transformer,
and power supply will not be protected.
() The
unit
will
not
operate
without
grounding.
It
is
recommended
that
a No. 12 or heavier wire be run from the
ground terminal on the amplifier to the ground terminal on the
battery.
()
The bi-Iateral 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.
ON-OFF Switch
Co12V DC power to amplifier
AM-FM
&
SSB Switch
Adjust delay constant of automatic
antenna relay
