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Radio Set SCR-508-(
), SCR-528-( ), SCR-608-( ),
SCR-628-( ), SCR-808-( ), SCR-828-( )
14. Required Parts
Items necessary for the installation of Radio Set SCR-508-( ),
SCR-528-( ), SCR-608-( ), SCR-628-( ), SCR-808-( ), SCR-828-( ) in
Truck 1/4-ton, 4 x 4, are listed below:
| Quantity |
Stock No. |
Item |
| A |
B |
C |
| 1 |
0 |
0 |
2A262 |
Antenna A-62, phantom. |
| 0 |
1 |
1 |
2A283 |
Antenna A-83, phantom. |
| 1 |
1 |
1 |
2Z1203-422 |
Bracket FT-422. |
| 0 |
1 |
0 |
2Z1140 |
Box BX-40-( ), for crystals. |
| 1 |
1 |
1 |
2Z1574 |
Cabinet CH-74-( ). |
| 0 |
1 |
1 |
6F796 |
Chest CH-96, for headsets, spare parts, etc. |
| 1 |
1 |
1 |
2Z2651-423 |
Clamp MC-423, for securing Mast Sections MS-51 and MS-52. |
| 1 |
1 |
1 |
2Z2651-424 |
Clamp MC-424, for securing Mast Sections MS-52 and MS-53. |
| 1 |
1 |
1 |
6Z3147 |
Connector No. 61007 and Bondnut BL-50 (Appleton). |
| 2 |
2 |
2 |
3E1307A-5.5 |
Cord CD-307-A, 65", for Headset HS-30-( ). |
| 1 |
1 |
1 |
3E1318 |
Cord CD-318( ), for Microphone T-45. |
| 2 |
2 |
2 |
3E1604 |
Cord CD-604, 6", for connecting Headset HS-30-( ) to Cord
CD-107-A. |
| 1 |
1 |
1 |
2Z3396 |
Cover BG-96-( ), for radio set. |
| 0 |
0 |
1 |
2Z3398 |
Cover BG-98-( ), for radio set. |
| 1 |
1 |
1 |
2Z3400-108 |
Cover BG-108, for mast base. |
| 2 |
2 |
0 |
3H1634 |
Dynamotor DM-34-( ), 12-volt, including attached spare
parts. ( Only one required for Radio Set SCR-528( ) or SCR-628-(
)). |
| 1 |
1 |
0 |
3H1635 |
Dynamotor DM-35-( ), 12-volt, including attached spare
parts. |
| 0 |
0 |
2 |
3H1664 |
Dynamotor DM-64-( ), 12-volt, including attached spare
parts. (Only one required for SCR-828-( )). |
| 0 |
0 |
1 |
3H1665 |
Dynamotor DM-65-( ), 12-volt, including attached spare
parts. |
| 1 |
1 |
1 |
6L50-508V26 |
Hardware bag. |
| 2 |
2 |
2 |
2B830 |
Headset HS-30-( ). |
| 3 |
3 |
3 |
3G621 |
Insulator IN-121. |
| 1 |
1 |
1 |
2A2088-48 |
Mast Base MP-48 or MP-48-A including 6 ft of Wire W-128. |
| 1 |
1 |
1 |
2A2090-50 |
Mast Bracket MP-50. |
| 1 |
1 |
1 |
2A2351 |
Mast Section MS-51. |
| 1 |
1 |
1 |
2A2352 |
Mast Section MS-52. |
| 1 |
1 |
1 |
2A2353 |
Mast Section MS-53. |
| 1 |
1 |
1 |
2B1617 |
Microphone T-17-( ). |
| 1 |
1 |
1 |
2B1545 |
Microphone T-45. |
| 2 |
2 |
2 |
2B1567 |
Microphone Cover M-367. |
| 1 |
1 |
1 |
2Z6721-237 |
Mounting FT-237-( ), including Cord CO-278 and necessary
hardware for mounting. |
| 1 |
1 |
1 |
2Z7721-285 |
Mounting FT-285-( ), including hardware for mounting. |
| 2 |
0 |
0 |
2C4403 |
RadioReceiver BC-603-( ) includes set of installed tubes and
spare fuses and lamps (one only required for SCR-528-( )). |
| 1 |
0 |
0 |
2C6494 |
Radio Transmitter BC-604-( ), includes installed tubes and
necessary crystals. |
| 0 |
2 |
0 |
2C4460-683 |
Radio Receiver BC-683-( ), including tubes, fuses, and lamps
(one only required for SCR-628-( )). |
| 0 |
1 |
0 |
2C6530-684 |
Radio Transmitter BC-684-( ), including tubes and necessary
crystals. |
| 0 |
0 |
2 |
2C4923 |
Radio Receiver BC-923-( ), including tubes, fuses, and lamps
(one only required for SCR-828-( )). |
| 0 |
0 |
1 |
2C6596-924 |
Radio Transmitter BC-924-( ), including tubes and necessory
crystals. |
| 2 |
2 |
2 |
2Z7069-429 |
Reinforcing Plate FT-429. |
| 1 |
1 |
1 |
2Z8056 |
Roll BG-56-( ), for antenna mast sections. |
| 2 |
0 |
2 |
|
Strap ( item 45, figure 25 ). |
( Quantity A ) SCR-508-( ), SCR-528-( )
( Quantity B ) SCR-608-( ), SCR-628-( )
( Quantity C ) SCR-808-( ), SCR-828-( ) |
 |
 |
 |
 |
 |
 |
 |
Figure 25: Installation of Radio Set
SCR-508-( ), SCR-528-( ), SCR-608-( ), SCR-288-( ),
SCR-808-( ), SCR-828-( )
In Truck, 1/4-ton 4x4 |
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15. Assembly and
Installation
a.) Preliminary Check.
Radio Set SCR-508-( ), SCR-528-( ), SCR-608-( ), SCR-628-( ),
SCR-808-( ), or SCR828-( ) may be installed in truck, 1/4-ton, 4 x
4, with either of the following 12-volt conversion kits. Check to
see that the conversion has been made before beginning installation.
(1) Under-the-hood conversion kit in which all
6-volt electrical components of the vehicle are replaced by 12-volt
components. Two 6-volt storage batteries, one originally furnished
with the truck, and one supplied with the conversion kit, are
installed between the front seats to furnish, in series, 12-volt
power supply for both the radio set and the vehicular system.
(2) Power-take-off conversion kit in which a
12-volt generator and regulator is mounted over the transmission of
the vehicle, to be driven by a belt and pulley operated off the
shaft of the transmission. Two 6-volt storage batteries are supplied
with the conversion kit and are installed, one behind each front
seat. These two batteries, in series, furnish 12-volt power for
operation of the set independently of the 6-volt system of the
vehicle.
b.) Procedure.
Components of the radio set should be installed as shown in figure
25 and as directed below.
|
Part and Location |
Method and Materials |
| Mounting FT-285-( ), and Strap (item 45, figure
25), in rear of vehicle, center. |
Attach the mounting to the floor of the vehicle
with the hardware provided. Secure top of mounting to vehicle
with strap (one at each end) as shown in figure 25. |
| Cabinet CH-74-( ), on Mounting FT-285( ). |
Attach to the mounting with the screws and
stop-nuts supplied in the bottom of the cabinet. |
| Mounting FT-237-( ), in Cabinet CH-74-( ). |
Attach the mounting to the floor of the cabinet
with the hardware supplied with the mounting. Route Power Cord
CO-278 to the car terminal box and secure as shown in figure 25. |
| Mast Bracket MP-50, Bracket FT-422, and
Reinforcing Plate FT-429, on the right side of the vehicle body,
at the rear. |
Attach the mast bracket to the wheel housing
with the reinforcing plate on the inside as shown in figure 25,
using the hardware provided. |
| Insulators IN-121. |
Install one insulator through the hole in the
mast bracket and vehicle. Install the other insulators through
the hole in the top of the right rear wheelwell and through one
end of Cabinet CH-74-( ), as shown in figure 25. |
| Mast Base MP-48 or MP-48-A, on Mast Bracket
MP-50. |
If Mast Base MP-48 is supplied, refer to figure
26 and assemble as follows:
Remove nuts and washers (items 2, 3, 4, and 5) from stem (item
1). Loosen setscrews (items 8 and 9) and pull assembly 7 out of
the mast base and stow the assembly. Prepare assembly 6 as
follows: Strip 1/2-inch of the insulation from each end of the
proper length of wire W-128; clean and tin the ends. Solder lug
(item 6B) to one end. Place the porcelain insulator (item 6C),
neoprene washer. (item 6D), and ceramic insulator (item 6E) over
Wire W-128. Insert the assembly into the mast base and secure
with setscrews (items 8 and 9). Make certain that item 6B is
inserted into the mast base as far as it will go. Insert Wire
W-128 and the stem (item 1) through the hole in the mast bracket
and secure in place with items 2, 3, 4, and 5. Flex the mast
base 90' and screw the retaining collar (item 18) on the end of
the mast base stem (item 1) to secure the assembly in the mast
base. Route the lead-in wire through Insulators IN-21 and attach
to the TR binding post on Mounting FT-237-( ). If Mast Base
MP-49-A is supplied, assemble as shown in figure 27. |
| Mast Sections MS-51 to MS-53 and Clamps MC-423
and MC-424, on the mast base. |
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 in Roll BG-56-( ). |
| Cover BG-108. |
Place on the mast base when the mast sections
are not in use. |
Radio Receiver BC-603-( ) or BC-683-( ) and
Dynamotor DM-34-( ), on Mounting FT-237-( ).
(Only one receiver and one dynamotor are used with Radio Set
SCR-528-( ) or SCR-628- ( )). |
If Dynamotor DM-34-( ) is not already
installed, proceed as follows:
Remove receiver chassis from cabinet by loosening the screw lock
in the rear center of the cabinet. Install the dynamotor unit on
the top rear of the receiver chassis by means of four screws
through its base. Place the receiver on Mounting FT-237-( ) in
the position shown in figure 25 and secure by means of the
thumbscrew lock. |
| Radio Transmitter BC-604-( ) or BC-684-( ) and
Dynamotor DM-35-( ) on Mounting FT-237-( ). |
If Dynamotor DM-35-( ) is not already installed
in Radio Transmitter BC-604-( ) or BC-684( ), proceed as follows:
Remove crystal case from the transmitter cabinet by loosening
the two screw locks on the front panel and pulling out the
crystal case. Loosen the four screw locks holding cover on top
of transmitter and remove the cover. Install the dynamotor unit
in the left rear of the transmitter chassis by means of four
screws through its base. Place transmitter unit on Mounting
FT-237-( ) in the position shown in f igure 25 and secure by
means of the thumbscrew lock. |
| Radio Receiver BC-923-( ) and Dynamotor DM-64-(
), on Mounting FT-237-( ). (Only one receiver and dynamotor are
used with Radio Set SCR-828-( )). |
If Dynamotor M-64-( ) is not already installed
in Radio Receiver BC-923-( ), proceed as follows:
Remove the, shield cover of the receiver by loosening the
fastener at the back of the cover and sliding the cover from the
chassis. Mount the dynamotor on the rear of the chassis and
secure with the hold-on screws. Make certain that the female
plug on the dynamotor engages properly with the male plug on the
chassis. Replace the dust cover in its original position, and
tighten the fastener. Place the receiver on the mounting as
shown in figure 25 and secure with the thumbscrew locks. |
| Radio Transmitter BC-924-( ) and Dynamotor
DM-65-( ), on Mounting FT-237-A (For Radio Set SCR-808-( ) or
SCR-828-( )). |
If Dynamotor DM-65-( ) is not already installed
in Radio Transmitter BC-924-( ), proceed as follows:
Remove the dust cover of the transmitter by loosening two
fasteners on the back of the cover and lifting the cover off.
Place the dynamotor in position on the transmitter and secure
with the slide fasteners. Replace the cover on the transmitter
and tighten the fasteners. Place the transmitter on the mounting
as shown in figure 25 and secure with the thumbscrew latch. |
| Antenna A-62, phantom. |
For installation with Radio Set SCR-508-( ) or
SCR-528-( ), see TB11-600-1. |
c.) Cording and Wiring.
(1) Cord and wire Radio Set SCR-508-( ), SCR-528-(
), SCR608-( ), SCR-628-( ), SCR-808-( ), or SCR-828-( ) as shown in
figure 25. Connect and secure so as not to interfere with the
accessibility and operation of the equipment. Enough slack must he
left to permit free movement of all units having shock mounting.
Cording or cable likely to rub against sharp edges should he taped
with at least two layers to prevent damage. Solder-tin all wire
ends.
(2) To prevent accidental shorts of the battery,
do not connect the positive 12-volt and negative 12-volt leads (in
the terminal box) until all other connections have been completed.
Figure 26: Mast
Base MP-48, assembly for installation |
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Figure 27: Mast
Base MP-48-A, assembly with Wire W-128 lead-in |
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