OPERAT ION
The tuning procedu re o f the transceiver is not
complicated. however. care shoul d be exercised
when tun i ng to insure peak performance of the equ i p
ment. The follow i ng paragraphs describe the procedu re
for receiver and transmitter tuning.
INITIAL CHECK
Before connecting the transceiver to a power source.
carefully examine the unit for any visible damage. Check
that all modules and crystals are firmly in place and
that controls and switches are operating normally. En
sure that voltage speci fication marked on rear panel
matches the supply voltage.
FREQUENCY SELECTION
The main tuning dial is color coded w ith the band
selector switch for proper frequency read out. W hen
band selected is marked in Red. the operator reads the
Red numbers on the main tuning dial. When for
example the band selected is marked in W hite on trans
ceiver front panel. the operator reads the Black numbers
on m ain tuning dial.
The main tun ing d ial is m arked in 25 K Hz increments
between each 100 KHz segment. This provides a
course frequency setting within the band. The dial skirt
surroun ding the tuning knob is marked
m
1 K Hz in
crements and provides for fine settings of the trans
ceiver operating frequency .
Following the example shown, fam i liarize yourself w ith
the relationship of main and skirt d ia l frequency read
out.
RECEIVER CALIBRATION ;
Preset the controls and sw itches as indicated ;
VFO Selector .................. I N T ( internal )
MOX-PTT-VOX ............... PTT
POWER ........................... ON ( upper position)
RF GAIN ........................ Maximum
AF GAIN ........................ As required
BAND .............................. Desired band
MODE .............................. Desired mode
TUNING ........................... 100 KHz point
PRESELECTOR ............... Desired band segment
CLARIFIER ..................... OFF
RF ATT ........................ OFF
CALIBRATOR ................. .100 KHz
To calibrate. set the TUNING control to the 100 K Hz
point on the dial nearest the desired frequency. Tune
the preselector for maximum " S " m eter deflection. Tune
the transceiver to the 100 K Hz calibrator signal for
zero beat. Two signals may be heard near the 100
KHz point. One of these is a signal feedi ng through
the IF stages. Always calibrate to the stronger of
these two signals. To calibrate. hold tuning knob firmly
at zero beat point and rotate skirt vernier dial to
zero position. The skirt vernier d ial surrounds the
tuning knob and is held in position by a fri ction
locking device. This dial is easily movable by hand
but w i l l retain its position after calibration. The trans
ceiver must be calibrated when changing mode of opera
tion of LSB. USB. AM or CW.
Switch the cali brator to the 2 5 K Hz pos1t1on and note
that the calibrator signal can be heard at every 25
KHz point. The calibrator switch should be in the
OFF position in normal use of the transceiver.
For bands 4 0 - 20-15 -lOA-lOC read Black scale on main
dial. Setting shown in the example would then be 148
K Hz plus the starting band edge frequency in MHz.
For example. on 4 0 meters the frequency would be
7.148 M Hz. On 20 meters. 1 4 .1 4 8 MHz. etc.
For bands 160-80-lOB-lOD read Red scale on main d ial.
Settings shown in the exam ple would then read 648 K Hz
For exam ple. on 80 meters the frequency wou l d be 3 .648
M Hz. on lOB. 28.648 MHz. etc.
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