Receiver, Radio R-1467(P)/GRC-144(V) DC Power Distribution

TM 11-5820-695-35

terminal board 2A15TB3 and through the tunnel diode

CARR IF indication informs the operator that the 70

amplifier fuse (2A15A2F2) to tunnel diode amplifier 2A2

MHz if carrier is at a low level or is not present. Also,

and to tunnel diode oven amplifier Indicator

for this condition, the receiver summary alarm circuit is

2A15A2DS13. Terminal board 2A15TB3 distributes 115

activated.

vac primary power to power transformer 2A15A4T1,

vane axial fan 2A15B1, and electrical frequency

(4) The summary alarm circuit is comprised

synthesizer 2A14. Refer to the Receiver, Radio R-

of diode OR gate CR12, CR15 and CR16 and transistor

1467(P)/GRC-144(V) interconnecting diagram (fig. 5-21)

Q23. Each of the normal outputs is connected to the

for point-to-point primary power connections. For the

OR gate. For normal operation, transistor Q23 is off

AN/GFC-144(V) 3 and 4 configurations, 115 vac passes

(nonconducting). When any one of the alarm conditions

to fan 2A1581 through thermostatic switch 1A15A17S1.

occur, the OR gate switches Q23 turn on (conducting

state) causing a receiver summary alarm condition.

2-26.

Receiver, Radio R-1467(P)/GRC-144(V) DC

2-25.

Receiver,

Radio

R-1467(P)/GRC-144(V)

Power Distribution (fig. 2-8)

Primary Power Distribution (fig. 2-7)

The 115 vac input from 2A15TB3 is applied to power

transformer 2A15A4T1 where it is transformed into four

The 115 vac primary power is applied to Receiver,

ac outputs: 29 vac (w), 19 vac (x), 18 vac (y), and 30

Radio R-1467(P)/GRC-144(V) through AC POWER

vac (z). Each output is applied to a voltage regulator in

INPUT connector 2A15A5J5. The 115 vac input passes

power supply 2A1. Three 15/28v voltage regulators and

through line filters 2A15A5FL2 and FL3 to POWER ON-

one 12v voltage regulator are utilized. A typical voltage

OFF switch 2A15-A2S2 on meter panel assembly

regulator is described in paragraph 2-18. The voltage

2A15A2. When the POWER ON-OFF switch is set to

regulators provide four regulated dc voltage outputs:

ON, 115 vac passes through the fuse 2A15A2F1 to

Figure 2-7. Receiver, Radio R-1467(P)/GRC-144(V) and R-1467(P) A/GRC-144(V),

Primary Power Distribution

Change 6

2-52