Navy Transmitting Antenna Tuner & Multicoupler Page

Info on NRL's development of Transmitter Multicouplers

xmtr-patch-01.JPG (324628 bytes)
Shipboard - Transmitters, RF Patch Panel, and Multicoupler		    xmtr-sw-02.JPG (162500 bytes)
Shore Station - high power RF patch panel		 xmtr-patch-01.JPG (57622 bytes)
Shore Station - high power RF patch panel

TRANSMITTING ANTENNA TUNERS & MULTICOUPLERS

AN/FRA-49(V)
multicoupler		 fra49-spec-01.JPG (124612 bytes)
need better photo

fra49-spec-02.JPG (132611 bytes)

 10 KW HF multicoupler
Shore Stations 

see NRL development page for info

fra49-spec-03.JPG (43181 bytes)
AN/SRA-13
AN/SRA-14
AN/SRA-15
multicouplers		 sra15-101.JPG (142763 bytes) four 500 watt inputs to one antenna
xmtrs must be 10% diff in freq.
AN/SRA-13 -  2 to 6 mc
AN/SRA-14 -  4 to 12 mc
AN/SRA-15 -  6 to 18 mc

sra15-3.jpg (117162 bytes)
CU-421B/SRA-15 coupler

 sra15-1.jpg (197786 bytes)
CU-421B/SRA-15 coupler

see NRL development page for info

SRA-13/14/15 NAVSHIPS 92746

Manuals available from Fair Radio Sales
AN/SRA-16
multicoupler		 sra16-spec-01.JPG (257355 bytes) sra16-spec-02.JPG (247766 bytes) four 500 watt inputs to one antenna
xmtrs must be 10% diff in freq.
9 to 26 mc

see NRL development page for info

manual NAVSHIPS 92839  

Manuals available from Fair Radio Sales  
AN/SRA-18
AN/SRA-18A
antenna tuner		 sra18-01.JPG (326412 bytes) 0.3-30 Mc 500w max system for use with AN/URT-2 series (autotune), AN/SRT-14 series, TBK, and other transmitters (manual tune)
  • C-1360/SRT Control Monitor Unit
  • CU-402/SRT Transmitter Coupler (impedance transformer)
  • CU-372/SRT Antenna Coupler Unit (fixed L, C)
  • TN-229/SRT RF Tuner (tunable L)
 sra18control.jpg (120207 bytes)
C-1360/SRT Control Monitor Unit

SRA-18 NAVSHIPS 92540
SRA-18A NAVSHIPS 93193
AN/SRA-22
antenna coupler		 sra22-102.jpg (17575 bytes)
sra22-12.jpg (16167 bytes)		 CU-714/SRA-22 antenna coupler +
C-2698/SRA-22 coupler control
or C-2494/SRA-22 coupler control

manuf Collins 180R-6
sra22-101.jpg (14202 bytes)
sra22-06.jpg (12323 bytes)
sra22-104.jpg (18560 bytes)

 manual NAVSHIPS 93286

sra22-11.jpg (16844 bytes)
sra22-02.jpg (19497 bytes)
AN/SRA-23
multicoupler		 need photo    Antenna multicoupler AN /SRA-23 consists of three couplers and associated control and blower units. The couplers cover the frequency range 2 to 27 mc in three frequency bands. Each coupler operates in a different band. These bands are 2 to 6 mc, 5 to 15 mc, and 9 to 27 mc. The coupler group was developed for use with 500-watt transmitters, but, with minor adjustments. it is capable of handling transmitters with 1000-watt outputs.
    One coupler group accommodates only one transmitter. Provisions are made, however, for connecting up to eight of these groups together to form a multicoupler system. This arrangement permits the simultaneous operation of eight transmitters into a single broadband antenna.

Manual NAVSHIPS 93196
AN/SRA-33
UHF antenna coupler		 sra33-01.jpg (36748 bytes) sra33-02.jpg (34762 bytes)

4 couplers, 225-400 MHz, 140 watts
uses C-4586/SRA-33 control/power supply

units and manuals avail from Fair Radio Sales

   The  AN/SRA-33  is  designed  for  operation  with shipboard   radio   set   AN/WSC-3.   The   AN/SRA-33 consists  of  four  antenna  couplers  (CU-1131/SRA-33 through   CU-1134/SRA-33),   a   control   power   supply C-4586/SRA-33,   an   electronic   equipment   cabinet CY-3852/SRA-33, and a set of special-purpose cables.
AN/SRA-35
AN/SRA-36
AN/SRA-37		 need photos 10 KW HF multicouplers
for Communications Ships 		 see NRL development page for info
AN/SRA-56
AN/SRA-57
AN/SRA-58		 xmtr-t1.jpg (101561 bytes) 1kw (2kw PEP) per input

AN/SRA-56   2-6 mc
AN/SRA-57   4-12 mc
AN/SRA-58   10-30 mc

components -
AN/SRA-56
four CU-1772/SRA-56 coupler units
PP-4993/SRA power supply
CV-6422/SRA-56 cabinet
CU-1773/SRA-56 matching network
  (to add four more coupler units)

AN/SRA-57
four CU-1774/SRA-57 coupler units
PP-4993/SRA power supply
CV-6422/SRA-57 cabinet
CU-1773/SRA-57 matching network
  (to add four more coupler units)

AN/SRA-58
four CU-1776/SRA-58 coupler units
PP-4993/SRA power supply
CV-6422/SRA-58 cabinet

 Specification document

Manuals available from Fair Radio Sales
  need more info!! - see also tuner section of Shipboard Equipment Manual    
AN/URA-27
(50 ohm)

AN/URA-34
(70 ohm)

 ura27-01.JPG (168509 bytes)
tuner photos thanks to WA5AVK		 Antenna tuner 2-30mc, 1kw
    CU-772/URA-27 tuner
    CU-773/URA-27 directional coupler
    C-2995/URA-27 control monitor

ura27-02.JPG (212709 bytes)

 manuf TMC model ATS-50-2 (50 ohm)
manuf TMC model ATS-70-2 (70 ohm)

manual   thanks to K4OZY
spec sheets   thanks to K4OZY

ura27-03.JPG (226111 bytes)
ura27-11.JPG (168272 bytes)

ura27-14.jpg (182562 bytes)

 ura27-15.jpg (113875 bytes)

ura27-12.jpg (142393 bytes)

ura27-04.JPG (29545 bytes) 

ura27-16.jpg (260565 bytes)
CU-937/UR cu937-ur-01.JPG (43249 bytes) cu937-ur-02.JPG (52164 bytes) cu937-ur-07.JPG (36581 bytes)

    More photos
antenna tuner for SRT-14 series   see SRA-18 photo above TN-229/SRT antenna tuner
CU-372/SRT antenna coupler
CU-402/SRT load adjusting unit 		  
antenna tuner system for URT-2 series scan-05.jpg (105577 bytes)
 TN-197/URT inductor tuning unit		 scan-07.jpg (117562 bytes)
 CB-5/URT capacitor tuning unit 		 P1010008.JPG (91293 bytes)
OA-297/URT controller group