Table of Contents
Advertisement
PLATE
AND
LOAD
TUNING
CAUTION:
When the MODE switch is in the CW position the final
tubes draw full plate current in transmit.
Final tube
life is directly related to the length of tune-up periods.
Do not transmit with the tubes out of resonance for
more than 10 seconds at a time.
TABLE 4. Summary of Transmitter Tuning Procedures
Turn
the MODE
switch to CW, turn the METER
switch
to RF, and keep the stand-by switch in the SEND position.
Quickly
adjust the PLATE
control
and then
the LOAD
control
alternately
to peak
(maximum
meter deflection)
the power output.
The peak should occur about 400 ma
on the IP scale (the METER
switch is still in the RF posi-
tion.
If necessary,
adjust the RF VOLT
control on the
rear panel to bring the output reading to 400 ma.
MODE
Switch
METER
Switch
Stand-by Switch
USB or LSB
TUN
IP
TUN
cw
4.8 SSB OPERATION
PTT
OPERATION
Tune the TS-900 as described in Sections 4.1 to 4.7.
Set
the MODE
switch
to USB or LSB and connect a micro-
phone to the MIC connector.
NOTE
International amateur practice dictates using USB
or LSB on the following bands.
3.5 MHz Band
7.0 MHz Band
14.0 MHz Band
21.0 MHz Band
28.0 MHz Band
Key the transmitter and speak into the microphone
with
the tone of voice used in normal operation. Adjust the MIC
18
SEND
Adjust BIAS control for 60 ma.
SEND
SEND
SEND
|
Procedure
Dip plate current with PLATE control.
Peak the ALC
reading with the DRIVE
control.
Peak RF output by alternately adjusting
the PLATE AND LOAD controls.
Advertisement
Table of Contents
