Navy Receiving Antenna Multicouplers

NRL Development of Receiver Multicouplers


Shipboard Receiver RF Distribution		  -  
1950's Shore Station Receiver RF Distribution including:

RECEIVING ANTENNA COUPLERS & MULTICOUPLERS
NT-50172 ckb50172-01.JPG (89825 bytes)

ckb50172-02.JPG (74093 bytes)

 4-24 mc - 4 outputs

ckb50172-03.JPG (63007 bytes)

 ckb50172-04.JPG (89637 bytes)

Manuf Hoffman
NAVSHIPS 900,226 
- download 7.9 MB pdf - thanks to AWA

NT-50279

RXA

 rxa-spec-01a.JPG (101823 bytes) 4-24mc, 3 antenna inputs, up to 10 receivers on each
Uses NT-50279 multicoupler

rxa-spec-01.JPG (235437 bytes)

 rxa-spec-02.JPG (146268 bytes)

Manuf Hoffman

NAVSHIPS 900213

AN/SRA-9
AN/SRA-12		 sra12-01.jpg (75717 bytes)

sra12-01.JPG (66109 bytes)

p1010055.jpg (58959 bytes)
SRA-12 on board BB-62

 14kc-32mc - 7 channels

Electrical filter assemblies (multicouplers) AN/SRA-9 and AN/SRA-12 are identical in appearance and function. They are receiving antenna distribution systems that make possible the multiple operation of a maximum of 28 radio receivers from a single antenna. Ordinarily it is preferable, however, to limit the total number of receivers to seven.sra12-101.JPG (84921 bytes)
    The AN/SRA-12 filter assembly provides seven radio frequency channels in the frequency range from 14 kc to 32 mc. Any or all of these channels may be used independently of any of the other channels, or they may operate simultaneously. Connections to the receivers are made by means of coaxial patch cords, which are short lengths of cable with plugs attached to each end.
    A set of nine plug-in type filter subassemblies is furnished with the equipment, but only six of them may be installed at one time. The six filters installed are selected to cover the seven most-used frequency bands. Filter crossover frequencies are 50, 150, 300, 530, 1500, 2000, 3500, 7000, and 14000 kc.

SRA-9 manual NAVSHIPS 91777
SRA-12 manual NAVSHIPS 92206

Manual pages - operation, schematics, etc.
AN/SRA-38,-39,-40
(56 rcvrs 2-30 mc)

AN/SRA-49
(20 rcvrs 2-30 mc)

AN/SRA-49A
(20 rcvrs 2-30 mc)

AN/SRA-50
(14 rcvrs 2-30 mc)

sra49-01.JPG (190075 bytes)

sra49-102.JPG (27610 bytes)

 ANTENNA   COUPLER   GROUPS - These  groups  are  designed  to  connect  up to 20 MF and HF receivers to a single antenna, with a highly selective  degree  of  frequency  isolation.  Each  of  the six  coupler  groups  consists  of  14  to  20  individual antenna  couplers  and  a  single-power  supply  module, all are slide-mounted in a special electronic equipment rack.  An  antenna  input  distribution  line  termination (dummy  load)  is  also  supplied.  In  addition,  there  are provisions  for  patching  the  outputs  from  the  various antenna  couplers  to  external  receivers.

Components

  • CU-1799/SRA (2-6 mc)           CU-1800/SRA (4-12 mc)
  • CU-1801/SRA (10-17 mc)       CU-1802/SRA (17-30 mc)
  • PP-4846/SRA power supply     DA-515/U dummy load
  • SB-3332/SRA patch panel        SB-3333/SRA patch panel

sra50-10.jpg (25667 bytes)  sra50-7.jpg (24884 bytes)

Manual NAVSHIPS  0967-303-8610

sra50-1.jpg (28216 bytes) sra50-3.jpg (18599 bytes) sra50-5.jpg (25782 bytes)
Top View

sra50-12.jpg (19040 bytes)
CU-168/FRR  

cu168-frr-101.jpg (11000 bytes)

cu168-frr-01.JPG (118396 bytes)

2-32 mc, 5 outputs, tube

cu168-frr-102.jpg (21008 bytes)

cu168-frr-02.JPG (16523 bytes)

technical article
 Manuf Collins & others

cu168-frr-103.jpg (18378 bytes)

cu168-frr-104.jpg (22686 bytes)

Manual NAVSHIPS 91697A
Download  -1.2MB PDF
CU-656/U cu656-u-01.jpg (74522 bytes)
wrong meter		 cu656-u-05.jpg (99425 bytes)
wrong connectors		 2-32 mc, 8 outputs - tube

manual avail from Fair Radio
CU-872A/U cu872a-u-01.jpg (20606 bytes) cu872a-u-05.jpg (31130 bytes) 2-32mc, 8 outputs - tube

Diagram and circuit description

manual avail from Fair Radio
CU-1099/FRR cu1099-frr-01.jpg (27107 bytes) cu1099-frr-02.jpg (27653 bytes) 2-32 mc, 8 outputs - transistor

Diagram and circuit description

NAVSHIPS 94933
avail from WA5CAB
CU-1382/FRR cu1382h-frr-01.jpg (7196 bytes) cu1382h-frr-03.jpg (7933 bytes) 2-32 mc, 8 outputs - transistor
CU-1563/URR
CU-1574/URR
CU-1575/URR		 nrl-multi-04a.JPG (117953 bytes) 10 receivers

CU-1563 2-6 mc
CU-1574 6-18 mc
CU-1575 10-30 mc

See NRL development page for info

spec sheet
CU-2007/SRR cu2007srr-11.jpg (29062 bytes) Combiner-Multicoupler 

8 VLF-LF outputs 10kc-1.85mc

1 HF output 1.85mc-30mc

     More Photos & Info
CU-2065/BRR cu-2065-2.JPG (17417 bytes)
cu-2065-4.JPG (21680 bytes)		 VLF-LF & HF outputs

cu-2065-1.JPG (20216 bytes)

 cu-2065-3.JPG (24771 bytes)
CU-2268/URR cu2268-4.jpg (42803 bytes) VHF and HF outputs    More Photos & Info
CU-5013/SRR cu5013-21.JPG (144858 bytes) cu5013-19.JPG (225342 bytes) 2-30 mc - 6 outputs
TMC AM6-2/70U

spec sheet

manual - thanks to K4OZY