RADIO FITTING -  B-24D AIRCRAFT (1943)

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A) Interphone System RC-36

Used for Intercommunication between crew members.
One amplifier mounted immediately behind co-pilot.

Type:  BC-347 Interphone Amplifier

Accessories:

PE-86 Dynamotor
BC-366 Jack Box (10 positions - one for each crew member)
T-17 throat mike or T-20 Microphone with RC-19A Microphone
amplifying equipment for each crew station.
 

B) Command Equipment (SCR-274-N System)

Used for aircraft-to-aircraft communication.

2 Transmitters located over wing center. 25 Watts output on CW.
3 Receivers located over wing center section.
 

Type: One BC-458-A Transmitter 5.3 - 7.0 Mc
          One BC-459-A Transmitter 7.0 - 9.1 Mc

Type: One BC-453-A  receiver  190  -  550  kc
          One BC-454-A  receiver 3000 - 6000 kc
          One BC-455-A  receiver 6000 - 9000 kc

Accessories:

DM-33-A Dynamotor for transmitter
DM-32-A Dynamotor for receiver
FT-226-A and FT-227-A mounting rack for transmitters
FT-220-A and FT-221-A mounting rack for receivers
BC-456-A Modulator Unit
FT-225-A Mounting for Modulator
BC-451-A Transmitter Control Box
FT-228-A Mounting for Control Box
BC-450-A Receiver Control Unit
BC-442-A Antenna Relay Unit
I-71-B   Antenna RF Ammeter

C) Liaison Equipment (SCR-287-A System)

Used for aircraft-to-ground or aircraft-to-base communications.
1 Transmitter on flight deck under radio operator's table.
1 Receiver on flight deck on radio operator's table.

Type: BC-375-D Transmitter -  200 kc 12,500 kc with seven tuning
units. 40 to 75 watts output depending on which tuning unit is
used.

Type: BC-348-H receiver - 1,500 kc to 18,000 kc
 

Accessories:

TU-26  Tuning Unit  200 to 500 kc
TU-5B  Tuning Unit  1,500 to 3,000 kc
TU-6B  Tuning Unit  3,000 to 4,500 kc
TU-7B  Tuning Unit  4,500 to 6,200 kc
TU-8B  Tuning Unit  6,200 to 7,700 kc
TU-9B  Tuning Unit  7,700 to 10,000 kc
TU-10B Tuning Unit  10,000 to 12,500 kc

CS-48 Storage Boxes for Tuning Units
PE-73-C Dynamotor Unit
J-37 Key Unit
RL-42 Antenna Reel
MC-163 and F10 Antenna Fairlead and Trailing Antenna
BC-306 Antenna Tuning Unit
SCR-211-D Frequency Meter
BC-461 Antenna Reel Control Box
X41-B10A16 Antenna Switch
 

D) Radio Compass Receiver (SCR-269-C System)

Used for direction finding and cross-country navigation.

Type: One BC-433C receiver over the bomb bay and aft of the wing.
      (200 to 1750 Kc)

Accessories:

Two BC-434-A Remote Control Boxes
Three MC124 Flexible Shafts
One MC-203 Flexible Shaft T connector.
I-81-A Pilots Indicator
I-82-A Navigators Indicator
BK-22-A Relay Terminal Panel
LP-21-A Rotatable Loop Antenna
CD-365 Antenna Cord
 

E) Marker Beacon Equipment (RC-43-A Unit 5)

Used in making instrument landings.

1 BC-357-B Receiver (75 Mc/s) located in bomb bay.

Accessories:

1 Special Antenna for beacon receiver under fuselage
1 WC-358 Antenna Lead

There are six separate antennas on the aircraft:

* The Command Set Antenna is a single wire which extends aft from alongside the top turret to the top of the left vertical stabilizer.

* The Liaison Fixed Antenna is also a single wire which extends aft from alongside the top turret to the top of the right vertical stabilizer.

* The Radio Compass Sense Antenna is a vertical whip type mounted on top of the aircraft at Station 5.1 and accessible through a junction box mounted in the top compartment of the life raft area.

* The Marker Beacon Antenna is mounted under the fuselage below the catwalk on standoff insulators. The lead in is at Station 5.0

* The Radio Compass Loop is mounted topside at Station 5.3 to 5.4.

* The Liaison "Trailing" Antenna is a single wire wound on an electrically operated reel located  under the flight deck.