Radio Set SCR-193-K SCR-193-KB

6) Required Parts
Items necessary for the installation of Radio Set SCR-193-K or SCR-193-KB in Truck, 1/4-ton, 4 x 4, are listed below:

Quantity	Stock No.	Item
1	2Z1108	Box BX-8, for transmitter spare tubes.
1	2Z1119	Box BX-19-( ), for receiver spare tubes.
1	2Z1121	Box BX-21, for Boxes BX-8, BX-19-( ), headsets, etc.
1	2Z1848	Case CS-48, for transmitter tuning unit.
1	2Z2651-421	Clamp MC-421, for securing Mast Sections MS-49 and MS-50
1	2Z2651-422	Clamp MC-422, for Securing Mast Sections MS-50 and MS-51
1	2Z2651-423	Clamp MC-423, for securing Mast Sections MS-51, and MS-52
1	2Z2651-424	Clamp MC-424, for securing Mast Sections MS-52 and MS-53.
1	3E2166A	Cord CO-166-A, for connecting Dynamotor BD-77-( ) to terminal box.
1	3E1226	Cord CD-226, for connecting Radio Transmitter BC-191-( ) to Dynamotor BD-77-( ).
1	3E1265	Cord CD-265, for Loudspeaker LS-3.
1	3E1273	Cord CD-273, for correcting Dynamotor BD-77-( ) to terminal box.
1	3E1307A-5.5	Cord CD-307-A, 65, for Headset HS-30-( )
1	3E1410	Cord CD-410, connects Radio Transmitter BC-191-( ) to terminal box.
1	3E1440	Cord CD-440, for connecting Radio Transmitter BC-191-( ) to Dynamotor BD-77-( )
1	3E1474	Cord CD-474, for connecting Radio Reciver BC-312-( ) to terminal box.
1	3E1604	Cord CD-604, 6" for connecting Headset HS-30-( ) to Cord CD-307-A.
1	3E1670	Cord CD-670, for connecting Dynamotor BD-77-( ) to Radio Transmitter BC-191-( ).
1	3E1676	Cord CD-676, for connecting Dynamotor BD-77-( ) to Radio Transmitter BC-191-( ).
1	2Z3367	Cover BG-87-( ), for Mast Base.
1	2Z3375	Cover BG-75-( ), for Radio Receiver BC-312-( ).
1	2Z3378	Cover BG-78-( ), for Radio Transmitter BC-191-( ).
1	3H1359	Cover BG-79-( ), for Dynamotor BD-77-( ).
1	3H1621	Dynamotor DM-21-( ).
1	3H1777	Dynamotor D-77-( ).
1	6L50-193KV26	Hardware Bag.
1	2B830	Headset HS-30-( ).
1	2Z5725-449	Installation Kit MC-449, including one each of item 1, figure 4; item 2, figure 5; and items 3, 4, 5, and 8, figure 3.
1	3G586	Insulator IN-86, for tying down mast sections.
1	3G598	Insulator IN-98.
2	3G621	Insulator IN-121.
1	3Z3445	Key J-45.
1	2Z6303.1	Loudspeaker LS-3.
1	2A2087	Mast Base MP-37 or MP-57 (2A2088-57).
1	2A2090-50	Mast Bracket MP-50.
1	2A2349	Mast Section MS-49.
1	2A2350	Mast Section MS-50.
1	2A2351	Mast Section MS-51.
1	2A2352	Mast Section MS-52.
1	2A2353	Mast Section MS-53.
1	2B1617	Microphone T-17-( ).
1	3H3907	Mounting FT-107-( ).
1	2Z6691	Mounting FT-151-( ), for RadioTransmitter BC-191-( ).
1	2Z6702	Mounting FT-162.
1	2Z6712	Mounting FT-172, snubber for Radio Transmitter BC-191-( ).
1	2Z6718	Mountinig FT-178, snubber for Radio Reciver BC-312-( ).
1	2C4312 ( ) 4	Radio Receiver BC-312-( ), including fuses, lamps, and tubes installed.
1	2C6191(&)	Radio Transmitter BC-191-( ), including fuses, lamps and tubes installed.
1	2Z8056	Roll BG-56( ), for Mast Sections.
50 ft.	6Z7926	Rope RP-5, for tying down mast sections.
2	2Z8793	Socket Cap M-163-( ).
1	2Z8794	Socket Cap M-164-( ).
2	2Z8795	Socket Cap M-165-( ).
1	2Z9313	Terminal Block TM-183, for car terminal box.
1	2C8005	Transmitter Tuning Unit TU-5-( ).
1	2C8006	Transmitter Tuning Unit TU-6-( ).
25 ft.	IB128	Wire W-128.

Figure 1: Installation of brackets for Radio set SCR-193-K in Truck, 1/4 ton 4x4 Jeeps


Figure 2: Mounting holes and location for Radio set SCR-193-K in Truck, 1/4 ton 4x4 Jeeps



Figure 3: Bracket Details for mounting Radio set SCR-193-K in Truck, 1/4 ton 4x4 Jeeps

Figure 4: Bracket detail for mounting Radio set SCR-193-K in 1/4 ton 4x4 Jeeps

Figure 5: Bracket detail for mounting Radio set SCR-193-K in 1/4 ton 4x4 Jeeps

7) Assembly and Installation
a) Preliminary Check.
(1) For the installation of Radio Set SCR-193-K, it is necessary that Truck, 1/4-ton, 4 x 4, be modified to have a 12-volt electrical system with two 6-volt batteries connected in series and installed between the front seats of the vehicle. These two batteries furnish power for the vehicular electrical system and the radio set. Make sure that the modification of the vehicle's electrical system has been made before starting the installation of the radio set.

(2) For the installation of Radio Set SCR-193-KB in Truck, 1/4-ton, 4 x 4, a power take-off must be installed in the vehicle. A 12-volt generator and regulator is mounted between the front seats of the vehicle and driven by a belt and pulley from the transmission shaft. Two 6-volt batteries are installed, one behind each front seat. The power supplied to the radio set is independent of the vehicular electrical system. Before proceeding with the installation of the radio set, make sure that the power take-off has been installed in the vehicle.

b) Procedure.
Components of the radio set should he installed as shown in figures 6 and 12 and as directed below. Figure 2 shows mounting holes and location for the equipment. Figure 1 shows the installation of the brackets for the radio sets. Bracket details are shown in figures 3, 4, and 5.

Part and Location	Method and Materials
Mast Bracket MP-50, Reinforcing Plate, and Bracket FT-422 (brush guard), items 5 and 8, figure 3, on left side of vehicle.	Refer to figures 2 and 12. If the holes for the brackets have not already been drilled, drill them as shown in view D-D, figure 12. Fasten the brackets on the outside. and the reinforcing plate for the mast base on the inside of the vehicle, as shown in figure 1, with the hardware provided.
Mast Base MP-37 or MP-57, on Mast Bracket ~MP-50, as shown in figures 6 and 12.	When Mast Base MP-37 is supplied, refer to figure 7 and assemble as follows: Place item 1 over the hole in the mast bracket. Place item 2 over item 1. Place item 3 over item 2. Insert item 4 through the hole in the mast bracket. Place item 5 over the flange on item 6. Insert item 6 upward through the hole in the mast bracket. Place items 7 and 8 beneath item 6 and fasten entire assembly in place with items 9 and 10. If Mast Base MP-57 is furnished, assemble as shown in figure 8 and as directed above.
Bracket (item 1, figure 4), Reinforcing Plate FT-429 (item 3, figure 3), and Mounting FT-151-( ) on left rear wheel well.	If the holes for mounting the brackets have not already been drilled, drill them as shown in plan view. figure 12. Mount the bracket and reinforcing plate as shown in figure 1. Secure Mounting FT-151-( ) to the wheel well with the hardware provided.
Radio Transmitter BC-191-( ), on Mounting FT-151-( ), as shown in figures 6 and 12. Socket Cap M-163-( ).	Place the transmitter on the mounting and secure in place with the snapslide fasteners provided. Place over the unused socket in Radio Transmitter BC-191-( ).
Mounting FT-172, on Radio Transmitter BC-191-( ).	Drill the cabinet of the transmitter as shown in figure 11. Assemble the mounting as shown in figures 6, 10 and 12.
Cover BG-78-( ), on Radio Transmitter BC-191-( ).	Cut a slot in the top of the cover to admit item 1, figure 10. Place the cover on the transmitter before completing. installation of Mounting FT-172.
Bracket (figure 5), Reinforcing Plate FT-429 (item 4, figure 3) and Mounting FT-162, on right rear wheelwell, as shown in figures 6 and 12.	If the mounting holes have not already been drilled, drill them as shown in plan view, figure 12. Install the brackets and reinforcing plate as shown in figure 1. Fasten Mounting FT-162 to the wheelwell with the provided hardware.
Radio Receiver BC-312-( ), on Mounting FT-162, as shown in figures 6 and 12.	Place the receiver on the mounting and secure with the snap-slide fasteners provided.
Mounting FT-178, on Radio Receiver BC-312-( ).	Remove the receiver from its cabinet and drill the cabinet as shown in figure 9. Assemble the mounting as shown in figures 6, 10 and 12.
Cover BG-75-( ) on Radio Receiver BC-312-( )	Cut a slot in the top of the cover to admit item 1, figure 10. Place the cover on the receiver before completing the installation of Mounting FT-178.
Mounting FT-107-( ), on bracket (figure 5), as shown in figures 6 and 12.	Drill Mounting FT-107-( ) as shown in figure 12. Install the mounting as shown In figures 6 and 12.
Dynamotor Unit BD-77-( ), on Mounting FT-107-( ), as shown in figures 6 and 12.	Place the dynamotor on the mounting and secure with the snap-slide fasteners.
Cover BG-79-( ), on Dynamotor Union BD-77-( ).	Place the cover over the dynamotor.
Case CS-48, on bracket (figure 5), as shown in figures 6 and 12.	Fasten the case to the bracket with the hardware provided.
Loudspeaker LS-3, on bracket (figure 5), as shown in figures 6 and 12.	Fasten the loudspeaker to the bracket with the hardware provided.
Headset HS-30-( ), Cord CD-307-A, and Cord CD-604.	Connect Headset HS-30-( ) to Cord CD-604; connect Cords CD-604 and CD-307-A, and plug Cord CD-307-A into the phone jack on Radio Receiver BC-312-( ).
Microphone T-17-( ) and Key J-45.	Plug into appropriate jacks on Radio Receiver BC-312-( ).
Insulator IN-98, on bracket (figure 4).	Fasten to bracket as shown in figures 6 and 12.
Insulators IN-121, on Mast Bracket MP-50 and on bracket (figure 5).	Install through the holes provided as shown in figures 6 and 12.
Mast Sections MS-49 to MS-53 and Clamps MC-421 to MC-424 on Mast Base MP-37 or MP-57.	Screw the mast sections together and secure with the clamps. Fasten the clamps to the male end of the mast sections. Then screw the mast antenna into the mast base. When not in use, carry the mast sections and the clamps in Roll BG-56-( ).
Roll BG-56-( ).	Disposition left to the discretion of the using arms.
Cover BG-67-( ).	Place over the mast base when the mast sections are not in use.
Boxes BX-8, BX-19-( ), and BX-21.	Disposition left to the discretion of the using arms.


Figure 6: Cording diagram for Radio set SCR-193-K in Truck, 1/4 ton 4x4

Figure 7: Mast base MP-37, assembly for installation

Figure 8: Mast base MP-57, assembly for installation

Figure 9: Drill cabinet of Radio Reciever BC-312-( ) for Mounting FT-178

Figure 10: Assembly of Mounting FT-172 of FT-178

Figure 11: Drill cabinet of Radio Transmitter BC-191-( ) for Mounting FT-172




Figure 12: Installation of Radio Set SCR-193-KB in Truck, 1/4 ton, 4x4 Jeeps

c) Cording and Wiring.
(1) Cord and wire the radio set as shown in figures 6 and 12. Connect and secure so as not to interfere with the accessibility and operation of the equipment Enough slack must be left to permit free movement of all units having shock mounting. Cording or cable likely rub against sharp edges should be taped with at least two layers to prevent damage. Soldertin all wire ends.

(2) To prevent accidental shorts of the battery, do not connect the positive 12-volt and negative 12-volt lead (in the terminal box) until all other connections have been completed.

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