Navy Receiver Accessories -
AF Switchboard, Jack Panel, Audio Amp, & Loudspeaker

sb-interconnect-01.JPG (180053 bytes)
Shipboard Receiver & Transmitter Switchboard Interconnections

RECEIVER RF PATCH PANELS - See Multicoupler Page
-

RECEIVER AF PATCH PANELS & METERS

Also see Receiver Site AF/RF Signal Distribution Units
SB-470/FG
Guam - patch panel
Patchboards at NAVCOMMSTA Guam - Note AN/FCC-3 multiplexer in Rack #14 and TH-39/UGT keyer in Rack #15		 Shore station audio patch panel

Also see Receiver Site AF/RF Signal Distribution Units

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NT-491397
nt91397-01.JPG (138586 bytes)		 24" patch cord with
NT-491242 plugs		 What numbers for other lengths?  manuf CN-491242 
manuf CN-491397
National Electric Machine
ID-1185/FRA
id1185-fra-06.JPG (62233 bytes)
AF level meter + amp & speaker		 id1185-fra-07.JPG (84778 bytes) id1185-fra-09.JPG (99789 bytes) Used in COMMSTA AF/RF Signal Distribution Unit 

transistorized - note - schematic is printed on bottom cover
TS-629B/U
ts629-u-1212-01.JPG (88828 bytes)

ts629-u-1212-05.JPG (112536 bytes)

 AF level meter

ts629-u-1212-04.JPG (111389 bytes)

 ts629-u-1212-03.JPG (43181 bytes) Used in COMMSTA AF/RF Signal Distribution Unit - barely visible at upper left of Guam photo above.

octal tubes - note - schematic is inside unit
ts629b-u-02.JPG (52112 bytes)

ts629b-u-04.JPG (69359 bytes)

ts629b-u-03.JPG (55837 bytes) ts629b-u-05.JPG (99245 bytes) --
--

RECEIVER AF TRANSFER SWITCHBOARDS
SB-82/SRR
sb82-103.jpg (16321 bytes)		 AF switching
10 remotes, 5 receivers
(10 outputs, 5 inputs)

sb82-101.jpg (11504 bytes)

 3-47.jpg (84724 bytes) Spec Sheet - thanks to HNSA

sb82-1103-01.JPG (371177 bytes)
    Receiver transfer switchboard, type SB-82/SRR, is shown above. The receiver switchboard has five vertical rows of ten single-throw (ON-OFF) switches that are continuously rotatable in either direction. One side of each switch within a vertical row is wired in parallel with the same sides of the other nine switches within the row. Similarly, the other side of each switch is wired in parallel horizontally with the corresponding sides of each of the other four switches in a horizontal row. This method of connecting the switches permits a high degree of flexibility.
    In general, there are more remote stations than radio receivers, hence the audio outputs five receivers are fed to the five vertical rows and ten remote stations are connected the ten horizontal rows. With this arrangement, a selected receiver output is connected to any or all of the remote stations by closing the proper switch(es). When one switchboard is inadequate for accommodating all of : receivers and remote stations installed in ship, several of these switchboards are mounted together and interconnected so that they form a bank of switchboards. 
    The knob of each switch is marked with heavy white line to provide visual indication of whether the switch is in the ON or OFF position Switchboards always are installed with the line positioned vertically when the switch is open (off). To further standardize all installations, receivers usually are connected to the vertical rows of switches, and remote stations are connected to the horizontal rows. Identification of the receivers and remote stations is engraved on the laminated bakelite label strips fastened along the top and left edges of the panel front.
SB-973/SRR
3-48.jpg (57084 bytes)		 SB-973/SRR aboard DLG-30
dlg30-radioswitch.jpg (150391 bytes) 		AF switching
10 remotes, 5 receivers

    A more recent model receiver transfer switchboard is the SB-973/SRR, illustrated at left. This switchboard contains 10 seven position rotary selector switches. Each switch or operating knob relates to a remote control station Switch positions one through five relate to receivers.
    Position X on each switch serves to transfer the remote control stations connected to the original switchboard to the corresponding switches in additional switchboards. In this manner, any number of receivers can be connected to the ten remote control stations. An additional switchboard is needed for each five additional receivers.
    Switchboards providing facilities for additional remote control stations are mounted in vertical sequence, whereas those containing additional receivers are mounted in horizontal sequence.

 

SB-2727/SRR
sb2727-01.jpg (56777 bytes)		 AF switching
20 remotes, 24 receivers

sb2727-srr-52.jpg (50991 bytes)

 sb2727-srr-54.jpg (53058 bytes) NAVSHIPS 0969-124-8010

 download pdf manual
sb2727-srr-51.jpg (58788 bytes) sb2727-srr-53.jpg (44564 bytes) sb2727-srr-55.jpg (57922 bytes) -
SB-3195/U  (crypto)
sb3195-u-01.jpg (26280 bytes)		 AF switching
8 remotes, 2 receivers

sb3195-u-02.jpg (10038 bytes)

 sb3195-u-04.jpg (15389 bytes) sb3195-u-03.jpg (32905 bytes)

LOUDSPEAKERS & AUDIO AMPLIFIERS
AM-215/U
AM-215A/U
AM-215B/U
AM-215C/U
AM-215D/U
audio amp		 5 inputs, 10 watts output

am215a-u-01.JPG (172182 bytes)
photo thanks to Dave Guggenheim

 AM-215 Info Page - Spec Sheets for all models

The AM-215( )/U is an audio amplifier unit that amplifies low-level audio signals for reproduction through loudspeakers. As many as five radio receivers and five loudspeakers can be connected to this unit, but only one signal is amplified and reproduced at any one time. The signal to be amplified and reproduced is selected by means of a channel selector switch located on the front of the amplifier unit. Other controls on the unit's front panel are a volume control, a power on-off switch, and a power-on indicating lamp.
AM-413/G
AM-413A/G
audio amp & compressor

Adjustment procedure and info

 am413-g-91.JPG (86157 bytes) am413-g-92.JPG (72570 bytes) Manuf - 
  Harmon-Kardon AM-413/G
  Amer. Measuring Instrument - AM-413A/G
am413a-g-0211-1300.jpg (10478 bytes) am413a-g-0211-1301.jpg (29506 bytes) am413a-g-0211-1302.jpg (44861 bytes) am413a-g-0211-1303.jpg (38287 bytes)
AM-3729/SR audio amp
am3729-sr-1301-01.JPG (537126 bytes)		 transistorized replacement for AM-215/U   -
AM-6222/U
AM-6223/U
audio amp
am6223-u-1103.JPG (11734 bytes)		 am6223-u-1102.JPG (19981 bytes) am6223-u-1100.JPG (96936 bytes) am6223-u-1101.JPG (86178 bytes)
AN/GSA-33
audio amp & compressor
gsa33-01.jpg (21763 bytes)		 Amplifier Group
5 channel compressor

AM-1910/G amplifiers
PP-2310/G power supply

Adjustment procedure and info

gsa33-02.jpg (22434 bytes)

 Manuf Melcor

NAVSHIPS 93433

gsa33-1203-01.jpg (90269 bytes) gsa33-1203-02.jpg (94671 bytes) gsa33-1203-10.jpg (286920 bytes) gsa33-1203-04.jpg (259604 bytes)
gsa33-1203-05.jpg (217764 bytes) gsa33-1203-06.jpg (221308 bytes) gsa33-1203-07.jpg (194019 bytes) --
gsa33-1203-08.jpg (192580 bytes) gsa33-1203-09.jpg (209709 bytes) gsa33-1203-03.jpg (135677 bytes) --
RMHP 22C-102
5 channel audio attenuator
af-atten-01.JPG (1288025 bytes) 		shipyard built item
aboard USS Midway 		-- --
LS-139/G

Rack mount twin speaker
used in Comm Stations

ls139-g-01.JPG (274807 bytes)

ls139-g-21.jpg (38467 bytes)

Version without phone jacks
Manuf Westlab & others

Version with phone jacks
manuf Airplane & Marine Instruments

ls139-g-41.jpg (37241 bytes)

ls139-g-42.jpg (45165 bytes)

Another version (DSA, not USN procurement - manuf Adek
ls139-g-31.jpg (29302 bytes)

ls139-g-34.jpg (44571 bytes)

ls139-g-32.jpg (9226 bytes)

  

NAVSHIPS 93095

ls139-g-44.jpg (49155 bytes)
LS-195/U
3-57.jpg (49513 bytes)		 need photo

   A general-purpose communication loudspeaker is the LS-195/U. Like the NT-49546, this unit is used mainly for monitoring voice channels. Unlike the NT-49546, however, the unit cannot withstand prolonged exposure to the weather; it is designed for installation in protected areas only. In addition, it has a front panel volume control and is transportable, whereas the NT-49546 has a preset, covered volume control and is mounted permanently.
LS-474/U
ls474-u-01.jpg (23533 bytes)
Manuf Fidelity Amplifier		 ls474-u-51.jpg (63914 bytes)
Red for classified circuits
Manuf Tabet		 am3729-ls474-01.jpg (10393 bytes)
LS-474/U + AM-3729/SR amplifier		 spkr-ls474-cv41-01.JPG (3036314 bytes)
LS-474/U + AM-3729/SR amplifier aboard USS Midway
NT-49545
amp/speaker
3-58.jpg (52482 bytes)

    The Navy type 49545 amplifier-speaker unit is a combination audio amplifier and loudspeaker assembly. Its reproduction qualities are considered good. Aboard most ships, it is installed in berthing and messing compartments as an entertainment loudspeaker.
    All operating controls of the unit are located on the front panel. They consist of a power on-off switch, a power-on indicating lamp, a tone control, a volume control, and a channel selector switch that permits selection of up to five different entertainment (or communication) channels.
spkr-49545-1301-1.JPG (162563 bytes) spkr-49545-1301-2.JPG (148217 bytes) spkr-49545-1301-4.jpg (76227 bytes) spkr-49545-1301-3.jpg (92859 bytes)
NT-49546
cul45946-10.jpg (136380 bytes)		 cul45946-12.jpg (24098 bytes) general radio use
manuf CUL University
cul45946-11.jpg (50453 bytes)		 --
Although it is a general-purpose communication loudspeaker, the NT-49546 is used principally for reproducing voice transmissions. The unit can be connected directly to a radio receiver, or it can be operated through an audio amplifier unit, such as the AM/215( )/U. Best results are obtained with the audio amplifier unit. The loudspeaker, designed as a watertight and shockproof unit for installation in exposed areas, also is used extensively in such spaces as the pilothouse and CIC. It usually is mounted on the bulkhead above or near its controlling amplifier unit.
NT-49583
spkr-49583-01.jpg (23855 bytes)		 spkr-49583-02.jpg (35266 bytes) - manuf CZY Allied Radio
NT-49620  amp/speaker
cmx49620-01.jpg (41130 bytes)		 spkr-nt49620-1103.jpg (111588 bytes)

Amp & 8" Speaker

cmx49620-102.jpg (41005 bytes)

 cmx49620-02.jpg (27449 bytes)
cmx49620-103.jpg (127307 bytes) cmx49620-108.jpg (14826 bytes)

cmx49620-106.jpg (9692 bytes)

 manuf CMX Magnavox-

cmx49620-105.jpg (92441 bytes)

spkr-nt49620-1105.jpg (141539 bytes) spkr-nt49620-1107.jpg (35166 bytes) spkr-nt49620-1109.jpg (113030 bytes) --

General Purpose & PA loudspeakers
LS-305/SIC
ls305-sic-01.jpg (6640 bytes)		 ls305-sic-02.jpg (13381 bytes)
70v line		 ls305-sic-03.jpg (6483 bytes) manuf Tabet
LS-388/SIC
ls388-sic-01.jpg (59768 bytes)		 ls388-sic-02.jpg (64355 bytes)
70v line		 ls388-sic-03.jpg (68726 bytes) ls388-sic-04.jpg (58902 bytes)
LS-530/SIC
ls530-sic-50.JPG (77135 bytes)		 ls530-sic-51.JPG (78578 bytes)
70v line		 ls530-sic-52.JPG (42589 bytes) manuf Telectro Systems
LS-543/SIC
ls543-sic-01.jpg (19720 bytes)		 ls543-sic-02.jpg (21862 bytes) - manuf University
MI-2915-FA
spkr-MI-2915-FA-01.jpg (18786 bytes)		 spkr-MI-2915-FA-02.jpg (18711 bytes) spkr-MI-2915-FA-03.jpg (9912 bytes) manuf RCA
MI-2961
MI-2961-01.jpg (20551 bytes)		 MI-2961-02.jpg (16414 bytes) - manuf RCA
NA-10001
na10001-spkr-01.jpg (10496 bytes)		 na10001-spkr-03.jpg (16382 bytes) na10001-spkr-02.jpg (11157 bytes) manuf Jensen