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|  through the following terminals and switch
across resistor R708. Resistors R708 and
contacts:
R706 are a voltage divider connected in
(1) Grounded contact 6 to 12 of S704A.
series with the +125 volts dc line to ground.
A portion of the +125 volts dc is dropped
(2) Meter M701 and R701.
(3) Contacts 12 and 6 of S704B.
across resistor R708 and is used for meas-
urement. A midscale meter reading cor-
(4) Terminal B of P701 and J7.
responds to +125 volts dc.
(5) Terminal M of J8 and P801.
b. When switch S704 is in the LOW B+
position, resist or R708 shunts M701
through contacts 4-12 of S704A and con-
tacts 12-4 of S704B.
a. When METER switch S704 is in the
LINE V position on the front panel of Re-
c. In Radio Set AN/TRC-68, the voltage
ceiver
Transmitter
RT-323/VRC-24
divider (R706 and R708) is returned to
meter M701 measures the 26.4-volt dc line
+125 volts through terminal K of P701 and
supplying power to Radio Set AN/VRC-24.
J7, and through terminal P of J15, terminal
When METER switch S704 is in the LINE V
K and R of P2, E of J15, and P of P1.
position on the front panel of Receiver-
d. In Radio Set AN/VRC-24, the voltage
Transmitter RT-441/TRC-68, meter M701
divider (R706 and R708) is returned to +125
measures the 26.4 volts dc supplied to the
volts through terminal K of P701 and J7,
POWER lamp on Power Supply PP-1494/U
and through terminal P of J15 and P2, ter-
and the front panel dial lamps and tr re-
minal T of P2 and J15, and terminal H of
lays in Receiver-Transmitter RT-441/
J14.
TRC-68. A midscale meter reading cor-
responds to 26.4 volts dc on both rt units.
b. When switch S704 is in the LINE V
position, resistor R703 is connected in
series with the meter circuit. The meter
a. When METER switch S704 is in the
circuit shunts the 26.4 source through the
HIGH B+ position, Meter M701 measures
following terminals and switch contacts:
the +300 volts dc supplied by either the
(1) Grounded contact 5 to 12 of S704A.
dynamotor (part of AN/VRC-24) or the
(2) Meter M701 and R701.
power supply (part of AN/TRC-68). METER
(3) Contacts 12 and 5 of S704B.
switch S704 connects meter M701 across
(4) Resistor R703 and terminal Y of
resistor R707. Resistors R707 and R705
P701 and J7.
form a voltage divider which is connected
(5) For Radio Set AN/TRC-68, the path
in series from the +300 volts dc line to
to 26.4 volts is completed through
ground. A portion of the +300 volts dc is
terminal E of P1.
dropped across R707 and is used for mea-
(6) For Radio Set AN/VRC-24, the path
surement. A midscale meter reading cor-
to 26.4 volts is completed through
responds to +300 volts dc.
terminal J of J10.
b. When switch S704 is in the HIGH B+
c. Resistor R704 and R716 function as
position, resistor R707 shunts M701
a meter shunt when S704 is in the LINE V
through contacts 3-12 of S704A and con-
position.
tacts 12-3 of S704B.
c. In Radio Set AN/TRC-68, the voltage
divider (R707 and R705) is returned to
+300 volts through fuse F701, terminal C
of P701 and J7, and terminal N of P1. When
a. When METER switch S704 is in the
Radio Set AN/VRC-24 is used, the voltage
LOW B+ position, meter M701 measures
divider path to +300 volts is similar, ex-
the +125 volts dc supplied by either the
cept that it is routed through terminal V
dynamotor (part of AN/VRC-24) or the
power supply (part of the AN/TRC-68).
of J15, terminals V and X of P2, terminal
X of J15, and F of J10.
METER switch S704 connects meter M701
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