US Navy Shipboard Transmitters & Transceivers

WW2 Transmitters and Transceivers - under construction

HF & MF AM/CW/FSK Transmitters

Equipment Photo Specs Manual & Links
AN/SRT-14 srt15-01.jpg (31055 bytes) 100w LF/HF xmtr
300kc-20mc
4-400 final AM/CW/FSK
manuf by Federal
similar to AN/URT-2

includes -

TN-229/SRT antenna tuner
CU-372/SRT antenna coupler
CU-402/SRT load adjusting unit

NAVSHIPS 92121(A)
AN/SRT-15 3-01.jpg (106618 bytes) LF/HF xmtr
100w 300kc-2mc
500w 2mc-26mc
4-400 final AM/CW/FSK
manuf by Federal
similar to AN/URT-3

SRT-14 plus "booster"
(high-power modulator and 3000v power supply)

NAVSHIPS 92121(A)
AN/SRT-16  two SRT-14 plus one "booster" LF/HF dual xmtr
100w 300kc-2mc
500w 2mc-26mc
4-400 final AM/CW/FSK
manuf by Federal
similar to AN/URT-4
NAVSHIPS 92121(A)
AN/SRT-17(XN-1) prototype - what is it? manuf by RCA 1959 NAVSHIPS 92944
AN/SRT-20(XN-1)
AM-1976(XN-1)/SRT
prototype - what is it? Manuf by ?
Amplifier design modified by Advanced Technology Corp 1960
NAVSHIPS 93275
AN/URC-7
transmitter-receiver
USCG
urc7-uscg-01.JPG (380475 bytes) - -
AN/URC-8(XN-1)
R-627/URC-8
T-474/URC-8
Transmitter-Receiver
urc8-01.JPG (148668 bytes)

urc8-02.JPG (188453 bytes)

urc8-03.JPG (146938 bytes)

urc8-04.JPG (75239 bytes)

Manuf by Collins

Prototypes only - intended as replacement for TCS

2-20 mc, AM-CW, 42w output

16 present frequencies
PTO or xtal control (4 xtals)

 

Click here for photos and more info - thanks to K4OZY

AN/URT-2
AN/URT-3
AN/URT-4
urt3-101.jpg (262325 bytes)

Photos - Accessory Units

primarily shipboard use
100w 300kc-26mc
(URT-3, -4 also 500w 2mc-26mc)
4-400 final AM/CW/FSK
10 channel remote select 
(preset frequencies + automatic tuning)

design & manuf by Federal - see 
"An automatic tuning communication transmitter"
Dettman, M.
IRE International Convention Record
Volume 1, Issue , Mar 1953 Page(s): 137 - 144

Essentially an auto-tune version of SRT-14, 15, 16 - design predates SRT-14 series

OA-353 Transmitter assembly
C-916/URT remote control

Auto antenna tuner
OA-297/URT controller group +
CB-5/URT capacitor tuning unit +
TN-197/URT inductor tuning unit

Optional "booster" OA-354/URT
(3kv p/s + pair 4-125 modulator)

URT-2 is 100 watts
URT-3 is 500 watts with booster
URT-4 is two URT-2 + booster

NAVSHIPS 91833

NAVSHIPS 92877?

 

Additional information

My URT-3 restoration project

AN/URT-12
T-408/URT-12
Coast Guard only?
urt12-01.JPG (203740 bytes)

more photos

75w HF 2-30 mc AM/CW
pair  4-65's modulated by 4-65's

manuf by Radiomarine 

urt12-02.JPG (91760 bytes)
photos thanks to Sam KF4TXQ

 

HF SSB TRANSMITTERS & TRANSCEIVERS

AN/SRC-16
Transceiver
src16-01.JPG (455105 bytes) modern "Communications Central"

will add more info later

will add info later
AN/URC-32
AN/URC-32A
AN/URC-32B
Transceiver
Photos, info, and manuals HF SSB transceiver

Collins KWT-6 family

Info and manuals
AN/URT-17
AN/URT-17A
Transmitter
urt17-01.jpg (197921 bytes) 750 w SSB/AM/CW
includes
   AM-1703/URT-17 amp (TMC RTF)
   AN/URA-23A exciter (TMC SBE-2)
   PP-1768/URT-17 p/s (TMC RTP)

manuf TMC GPT-750-D (URT-17)
                    GPT-750-D2 (URT-17A)

manual
spec sheets
thanks to K4OZY

urt17a-02.JPG (26282 bytes)
ebay URT-17A w/ homebrew exciter
AN/WRT-2
Transmitter
wrt2-01.jpg (45610 bytes) wrt2-101.jpg (124672 bytes)

2-30 mc transmitter
500W CW, FSK, AM
1000w SSB/ISB

HFRG
Transceiver
hfrg-01.JPG (161660 bytes) Modern High Frequency Radio Group

hfrg-02.JPG (81738 bytes)

-
High Frequency Radio Group (HFRG) is a fully automated subsystem of the external radio communications system (RCS) aboard surface ships. The HFRG operates in the Very Low Frequency (VLF), Low Frequency (LF), Medium Frequency (MF) and High Frequency (HF) bands and supports full duplex, half duplex and simplex operation for tactical and long-haul voice, interrupted continuous-wave, teletype and digital data communications in the Lower Sideband (LSB), Upper Sideband (USB), Independent Sideband (ISB), Amplitude Modulation Equivalent (AME) and Link 11 modes of operation. The HFRG consists of three subsystems: the Transmit Subsystem, the Receive Subsystem and the Control/Monitor Subsystem (CMS).
Transmit Subsystem: The Transmit Subsystem operates (in increments of 10 Hz) in the frequency range of 2 Mhz to 30 Mhz and is used primarily for broadband circuits. The Transmit subsystem is designed to allow all exciters to operate in the Link 11 mode, but contains the assets required to support two (2) 1kW narrowband circuits which are the primary HF Link 11 circuits. The operational capabilities of the transmit subsystem require both broadband and narrowband antennas. The operational configuration of the transmit subsystem is accomplished in response to commands from the CMS and frequency changes (except narrowband) are completed in less than 100 milliseconds. The transmit subsystem reports to the CMS when the system is configured and also reports detected failures.
Receive Subsystem: The Receive Subsystem operates (in increments of 10 Hz) in the frequency range of 14 Khz to 1.619 Mhz and 2 Mhz to 30 Mhz. The receive subsystem requires at least two broadband antennas and 1 or 2 additional antennas dedicated to the use of the Ship Signal Exploitation Equipment (SSEE). The operational configuration of the receive subsystem is accomplished in response to commands from the CMS and frequency changes are completed in less than 20 milliseconds. The receive subsystem reports to the CMS when the system is configured and also reports detected failures.
Control/Monitor Subsystem (CMS) The Control/Monitor Subsystem is the backup point of control for the HFRG when the system is being controlled by the Surface Ship Automated Communications Control System (SSACCS) (part of the Communications Support System (CSS)). The SSACCS normally controls the HFRG through an interface with the CMS, but if the SSACCS becomes inoperable the CMS automatically assumes the functions of remote control, performance monitoring, test, operator interface, and display of the operational characteristics. The CMS is used to send configuration commands to the transmit and receive subsystems and, in turn, receive configuration completion and operational characteristics from these subsystems.
Collins KWS-1
Transmitter
Collins KWS-1 SSB transmitter procured 1956 with modified 75A-4 for SSB experiments NAVSHIPS 92787
RCA SSB-1
Transceiver
More SSB-1 photos and info 

SSB1-RCA-03.JPG (17098 bytes)

SSB1-RCA-01.JPG (10876 bytes)

 SSB1-RCA-02.JPG (38476 bytes)
RCA SSB HF transceiver 60 watts
4-channel, crystal controlled 3-15 mc
pair of 6146 output (3x 6146 in later models)

Commercial unit used extensively by USN before military equipment was procured

 

NAVSHIPS 92917

ssb1-101.JPG (104062 bytes)
SSB-1 block diagram

More SSB-1 photos and info 

VHF/UHF TRANSMITTERS & TRansceivers

TED-6
Transmitter
ted6-01.jpg (34849 bytes) UHF 225-400 mc AM

15 watts output

NAVSHIPS 91357
AM-1365/URT
Amplifier
am1365-01.jpg (210296 bytes)  UHF amplifier for TED 

 manuf Manson Lab

NAVSHIPS 92549
SRC-17
Transceiver
need photo  UHF transceiver NAVSHIPS 94127
AN/URC-9
AN/SRC-20
AN/SRC-21
Transceiver
need photo UHF transceivers
225-400 mc AM
manuf Collins
   
AN/URT-7
AN/URT-7A
AN/URT-7B
AN/URT-7C
Transmitter
urt7-02.jpg (346697 bytes) VHF xmtr 115-156 mc AM
two 4x150A finals, 30w output
xtal controlled - 4 channels

Transmitter T-336/URT-7 including
 - Amp/Osc AM-638/URT
 - Modulator MD-163/URT
 - Power Supply PP-773/URT

manuf URT-7C Rauland-Borg 1956