2-1
CHAPTER 2
OPERATING INSTRUCTIONS
2.1 INTRODUCTION: The following
instructions will enable the operator to quickly
place the TITAN III in operation. Included are
descriptions of the front panel controls and rear
panel connections, followed by a detailed tune-
up procedure. Refer to Chapter 3 operation and
safety tips.
2.2 FRONT PANEL CONTROLS: The front
panel controls and their functions are described
below.
2.2.1 BAND SWITCH: This switch selects the
desired frequency of operation. This is an eight
position switch that covers the 160 meter to 10
meter bands. NOTE: A built-in switch stop
prevents operation in the 10 and 12 meter bands.
For 10 and 12 meter operation you must contact
the factory for an authorized modification kit.
30 meter operation is done in the 40B position,
17 meter operation in the 15 meter position, 12
meter operation in the 10 meter position.
2.2.2 TUNE: This control adjusts variable
capacitor C1 to provide resonance at the
operating frequency. Figure 2-1 shows the
approximate settings for both the TUNE and
LOAD controls on each band. Keep in mind
that the settings in this chart are for operation
into an ideal 50 ohm resistive load. There is
also a blank log chart that you may use to record
the actual control settings for your antennas.
2.2.3 LOAD: This control adjusts variable
capacitor C2 for the proper amplifier output
loading. See Figure 2-1.
2.2.4 POWER: This switch routes the AC line
to the primary of the low voltage supply. When
on, the TITAN III will power up and the
indicator light in the POWER switch will light.
2.2.5 OPERATE/STANDBY: This switch,
when in the OPERATE position, places the
amplifier online. When in the STANDBY
position, the amplifier is bypassed and only
the transceiver power is routed to the
antenna. When in the OPERATE position,
the indicator light in the switch will light.
NOTE: No high voltage will be read on the
metering when this switch is in STANDBY.
The OPERATE/STANDBY switch also
serves as the plate current trip-off circuit
reset switch. At 1.5 amps plate current, the
plate current trip-off circuitry will activate.
The lighted segment of the
OPERATE/STANDBY switch will go out
when plate current trip-off has occurred. To
reset, switch back to STANDBY and
immediately back to OPERATE. The
lighted segment of the switch should now be
lit again and the amplifier is ready to use.
2.2.6 QSK/PTT: This switch, when in the
QSK position, configures the key circuits for
CW/QSK operation. For late model TEN-
TEC transceivers with TX EN and TX OUT
connectors, or late model Yaesu transceivers
connected using a full break-in keying loop,
this position is used for all modes of
operation. Placing the switch in the PTT
position allows the TITAN III to be
controlled by the PTT/VOX input jack
rather than the KEY IN/KEY OUT loop.
2.2.7 MULTIMETER SWITCH: This
switch connects the right hand meter to
monitor various amplifier parameters.
A. Plate voltage (Ep) - When in this
position, the meter reads plate voltage.
This voltage is line voltage dependent
at a ratio of 12.5 V plate per 1 V line.
Plate voltage is approximately 3000
VDC at a line voltage of 240 VAC.
Therefore, at a line voltage of 250
Summary of Contents for TITAN III 417
Page 19: ...2 6 BAND FREQUENCY LOAD TUNE ANTENNA NOTES FIGURE 2 2 MODEL 417 TUNING LOG ...
Page 20: ...2 7 FIGURE 2 3 TITAN III FRONT VIEW FIGURE 2 4 TITAN III REAR VIEW ...
Page 21: ...2 8 FIGURE 2 5 TITAN III TOP VIEW ...
Page 22: ...2 9 FIGURE 2 6 TITAN III BOTTOM VIEW ...
Page 40: ...5 15 FIGURE 5 21 SCHEMATIC DIAGRAM MODEL 417 ...
