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117 volts,
AC at 1 ampere.
3.
Two wires to connect to TB101-9&10.
This provides
operating voltage for the crystal oven.
Requirements are
117 volts, AC at about
6
watts intermittent service.
In addition,
if the exciter unit is used to supply B/ to some
other unit a wire must be connected from TB101-6 to the other
unit.
An additional 20 to 30 milliamps at / 320 volts
maybe
drawn from this terminal when the exciter is transmitting a
full 10 watts.
If output power from the exciter unit can be
reduced to 3 or
4
watts, up to 50 milliamps may
drawn from
TB101-6.
The exciter may also be used to supply filament voltage to some
other unit.
To do this,
a wiro must be connected from TB101-4
to the other unit.
6.3 volts,
AC at about 1-1/2 amps, is a-
vailable to be drawn from this terminal.
o
If the power amplifier stage of the exciter unit ( V115)
is to
be externally metered the jumper connecting TB101-5&6 should
be removed.
A wire should then be connected from TB101-5 to
the positive terminal of the external milliammeter and a wire
should be connected from TB101-6 to the negativo terminal of
the milliammeter.
The final stage will draw about 65 milliamps
when output power is 10 watts.
The external milliammeter should
have a minimum full scale deflection of 100 milliamps.
PRE-OPER.,TION
In almost all cases the exciter unit has been properly tuned
up to customer frequency at the Gates plant.
If all tubes •
and other components are properly in place, wires connected,
etc., the exciter may be placed into operation by turning S101
to the " ON" position.
This switch is loulted in the primary
circuit of T103.
When it is turned " ON" both thé filament
voltage and the
13/ voltage come on to all tubes.
The'recti-
fier tube is of the slow heating indirect cathode type, and
positive voltage will not exist for perhaps 20 seconds,
after
this length of time the exciter power output will come
up.
The only adjustments that will have to be made are to tune C169
(output coupling)
and C167 ( V115 plate tune)
for maximum power
output into a load,
following stage,
or antenna.
Final adjust-
ment of C167 and 0169 should be done only after the exciter has
come up to full operating temperature; this will take about 15
M6095 Exciter
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