Transmission - Kenwood TS-700A Operating Manual

4-2. TRANSMISSION
Before transmitting, perform all the necessary
procedures for optimum reception. Make sure that the radio
waves you have selected does not interfere with other radio
stations.
Adjust the controls and knobs (DRIVE knob, FINAL
knob, microphone VR, etc.) for transmission of good quality
signals. Connect a 50-ohm dummy load or antenna to the
transceiver before starting to adjust the various controls.
The use of dummy load is recommended because this
prevents the emission of disturbing signals. Use the dummy
load, which is sized to dissipate about 20 watts of
transmitter power. The tuning procedure should be com-
pleted within the least time possible from the viewpoint of
the life of the transceiver. Set the controls and knobs as
shown in Table 3 below.
Table 3. Initial settings of control on front panel
iF Standby Switch...... REC
RIT Switch ewOER
MODE Switch CW
RF GAIN Knob Fully clockwise
DRIVE Knob 500
FINAL Knob... . 144
RIT Knob #0
AF GAIN Knob .. Set for proper volume on reception
SQUELCH Knob..... Set for optimum squelch effect
(do not set CAL to ON)
BAND Switch ........ 144
VFO
.. 500
FIX CH Switch
DIAL SCALE...
Receive frequency —. 7 Transmit frequency
| fe 600Hz
Party's station
, —» Frequency
Receive frequency. | —Transmit frequency
Your eae
TS ee
Receive frequency _— Transmit frequency
Transmit frequency
'
— Receive frequency
Your station
Adjust receive frequency only with RIT knob.
Fig. 5 AM Frequency Relationship
14
CW Mode
Turn BAND switch to your desired frequency
(144—148 MHz). After turning MODE switch toCW posi-
tion, shift STANDBY switch from REC to SEND position just
to make sure that the meter pointer deflects and ON AIR
lamp lights up, and then move back this switch to REC posi-
tion.
Under this condition, move STANDBY switch to SEND
side and rotate DRIVE knob for maximum deflection of the
meter pointer deflection further. Repeat this manner a few
times.
The foregoing procedure should be carried out rapidly,
without unnecessary long delay at each step. If the
telegraphic key device has already been connected to the
transceiver during adjustments, the device should be set in
the key-down" condition. Having adjusted the transceiver
as above, you are now ready to use the key for CW com-
munication.
Other Modes
When the transceiver is properly adjusted for operation
in CW mode, it is ready for use in other modes (FM, LSB,
USB and AM). Connect the microphone and speak after
shifting the STANDBY switch to SEND position. Your voice
will now be transmitted.
Microphone gain adjustment for FM and SSB (USB,
LSB) can be made by the gain adjusters which become
accessible when the top lid of the transceiver case is remov-
ed. The optimum setting position of these adjusters is about
the midway position of their turning range (see Fig. 8). The
microphone gain should preferably be reduced as small as
possible to assure good quality of transmission. In AM
mode, optimum output can be obtained by adjusting the AM
CAR knob (see Fig. 8) inside the transceiver until the meter
indicates anywhere between "3" and "5".
Make a loop of Imm tin
plated wire Connect 20 resistors.
Use 20 solid or RF resistors rated
at 1k2 IW to compose a 502 20W
dummy load. A 75Q dummy load is
composed by using |.5kQ resistors
Fig. 6 Composing the Dummy Load