AfterBurner 420 Installation & Operation Instructions - Page 3
Browse online or download pdf Installation & Operation Instructions for Amplifier AfterBurner 420. AfterBurner 420 4 pages. Bi-lateral linear amplifier
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AMATEUR
BAND
OPERATION
IOOpf CAPACITOR
ACCROSS C-17
Before applying any RF power to the Linear, pretune the tune
control knob to the desired frequency at which you wish to
operate.
See illustration
For example,
if your desired
then set the tune knob at midpoint between 26 and 30 as
shown.
50
For operation
on the
to
the 30 MHz position
as shown at right.
54
MHz
Operation.
at right.
operating frequency
is 28 MHz
54
MHz band set tune control
Then refer to 50 to
A portion
of the incoming
sensing transistor.
This causes Q1 to conduct
on Q2, relay transistor.
Relay K 1 connects
the input signal to the cathodes
applies
plate
voltage
circu it to the antenna.
C18 is the Pi-net tune capacitor
of the ampl ifier.
C17 is the Pi-net load capacitor
antenna.
For SSB operation,
C22 is added to the relay transistor
extned the "drop out" time.
An integrated
circuit
signals from the antenna
This amplifier
is powered
REC AMP switch.
With
position
the
receive
requ ired. With the
switch
amplifier
is disabled
and the receive amplifier
the OFF position
(see important
to
circuit
is coupled
to the base of Q1
and change. the bias
Q2 conducts
heavily and closes relay K 1.
to V 1 and V2, and connects
and sets the operating
and controls
the coupling
amplifier
increases the level of the incoming'
before
it is applied
to the transceiver.
by the XMT-Standby
switch
the XMT-Standby
switch
ON or OFF
amplifier
can
be switch
in the standby
position,
switch should be in
note).
of V1 and V2,
the output
frequency
to the
circu it to
and the
in the XMT
as
the receive