MICROPHONE CONNECTIONS
An Amphenol Type MC2M plug, or the equivalent, must be used for connecting the microphone
to
the panel MIC receptacle. The microphone may be either a high impedance dynamic (preferred) or
a ceramic type. Since all necessary audio bandwidth restriction is incorporated in the transceiver
circuitry, a wide-range, high quality dynamic mike may be used and is most desirable. The required
wiring to the MC2M plug is shown in Fig. 3.
FIGURE 3
CAUTION
r
-- - -
-,
R
I
i
/ \]
!
L-
- -
-
Interchanging of the microphone connections by
incorrect wiring
to
the microphone plug will
cause a negative bias voltage
to
be applied
to
the microphone cartridge, resulting in possibly
serious damage.
OPERATION
IMPORTANT: Before operation of the transceiver is attempted, a proper installation must be com-
pleted. This includes connection of a suitable antenna (40-80 ohms)
to
the ANTENNA jack, a correctly
wired microphone to the MIC connector (or a key
to
the KEY jack at the rear), and a proper power
cable from the power supply
to
the POWER plug. The FUNCTION switch must be set at OFF during
the installation.
SSB OPERATION
Preset panel controls as follows: (abbreviations: cw - clockwise, ccw - counterclockwise)
MODE switch. . .
.
•
.
. .
.
. . . .
.
. . . . .
. .at SSB
MIC GAIN.
. .
.
. .
.
.
... .
.
.
•
.
. .
.
fully ccw, but not past detent
CARRIER BALANCE
. . .
•
...
. .
at 12 o'clock
RF GAIN....
. .
....
. . . . . . .
.•
.at
9 o'clock
AF GAIN
. . . . . . . . .
.
. . . . . .
.
..
. fully cw
BAND
selector . .
•
.
... . ....
. .at proper
band
MAIN TUNING
. . . . ... . . . . . . .at
desired frequency
RC VR
OFFSET.
.
. . . . .
.
. .
.
. .at centerline
PA TUNE
.
. . . . . . .
. .
. .
. .
. ..• at
12
o'clock
PA LOAD.
.
.
. .
.. . . ...
.
•
.
.
.
.
fully ccw
EXCITER TUNE
.
...
.
.
.....
.at
12 o'clock
FUNCTION switch. . . . .
.
.
. . .
at STBY for 5 minute warmup, and then
to
P-T-T
RECEIVER TUNE -UP FOR SSB OPERATION
1.
Adjust PA TUNE and EXCITER TUNE for maximum audible signal strength or background
noise. These adjustments result in approximate transmit tuning since they are common
to
receiver
and transmitter.
2. Adjust AF GAIN for a normal listening level.
TRANSMITTER TUNE- UP FOR SSB OPE RATION
1.
Set MODE switch at TUNE and adjust EXCITER TUNE for a maximum meter reading.
2. Adjust PA TUNE for a minimum meter reading (dip) to obtain correct tuning of the output PI
network.
4
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