HF & MF AM/CW/FSK Transmitters
300kc-26mc
synthesized VFO
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
article in Electric Radio magazine April 1997 p4
100w 300kc-2mc
500w 2mc-26mc
synthesized VFO
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)
LF/HF dual xmtr
100w 300kc-2mc
500w 2mc-26mc
synthesized VFO
4-400 final AM/CW/FSK
manuf by Federal
similar to AN/URT-4
AM-1976(XN-1)/SRT
Amplifier design modified by Advanced Technology Corp 1960
transmitter-receiver
USCG
R-627/URC-8
T-474/URC-8
Transmitter-Receiver
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-3
AN/URT-4
Photos - Accessory Units
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 92877?
T-408/URT-12
Coast Guard only?
pair 4-65's modulated by 4-65's
manuf by Radiomarine
photos thanks to Sam KF4TXQ
AN/WRT-1A
LF Transmitter
125w AM
500w CW/FSK
Download 64.9 MB pdf
HF SSB TRANSMITTERS & TRANSCEIVERS
SRC-16 Communications Central Control aboard DLG-33
photo thanks to W5JV
4 independent rcvr-xmtr channels
2-30mc, SSB/CW/NTDS, 500w PEP
Modern SSB
transceiver
2-30mc CW/SSB, 1kw PEP
AN/URC-32A
AN/URC-32B
Transceiver
HF SSB transceiver
2-30mc, CW/SSB, 500w
Collins KWT-6 family
Transceiver
2-30 mc, 100w
AM/3007/UR amplifier
C-9044/URC-35 remote control
used with
CU-937/UR antenna coupler
C-9044/URC-35 remote control
2-30mc,1kw
AM-3924/URT - RF amplifier
PP-3916/UR - power supply
MT-4670/URT-23 - shock mount
used with
AN/URA-38 - antenna coupler group
C-3698/URA-38 - controller
CU-938/URA-38 - coupler
manuf by Harris
Mil Spec MIL-T-28706F here
T-827B/URT exciter
Transmitter-Receiver
2-30mc, 100w
R-1051/URR receiver
T-827/URT exciter
AM-3007/UR power amplifier
used with
CU-937/UR antenna coupler
T-827B/URT exciter
Transmitter
2-30 mc transmitter
500W CW, FSK, AM
1000w SSB/ISB
AN/URC-131(V)
HFRG
Transceiver
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.
From "Jane's Military Communiocations"- The AN/ URC-131(V) High Frequency Radio Group (HFRG) system is an integrated, solid-state naval communications suite, designed to provide a balance between transmitter and receiver performance in a co-located shipboard environment. The three main communications components of the AN/URC-131 (V) are the Broadband Transmit Group (BTG), the Narrowband Transmit Group (NTG) and the receive system. The third-generation BTG is of solid-state design and provides coverage of the 2 to 30 MHz band. Three BTG variants have been produced - a 4 kW (8 circuit) system, an 8 kW (17 circuit) system and a 12 kW (26 circuit) system. All three systems use only two topside broadband antennas. The NTG consists of up to three solid-state 1 kW transmitters with power post-selectors and digital antenna couplers. The NTG can be tuned in the presence of adjacent antenna interference and offers completely silent tuning. It has a rapid-tune digital antenna coupler. It can also serve as a stand-alone system aboard small ship platforms. The receive system's R- 2557A/ URC receiver operates over the full LF, MF and HF frequency range from 10 kHz to 30 MHz. Other features include: up to 49 receive circuits; passive antennas, which require no electronics topside; and an atmospheric noise-limited design. The HFRG's HFRG Remote Control/ Monitor Subsystem (RCMS) is designed for 'lights out' operation in the transmitter and receiver compartments. Its features include: a ruggedised, PC workstation with full ASCII keyboard and pointer for function selection/ activation; redundant control buses and subsystem controllers for system survivability.
Transmitter
1959 spec sheet
R-100 receiver
R-100 receiver
A small number were installed for interim testing before military SSB equipment was procured.
Included:
R-100 receiver
T-100 transmitter
M-100 Antenna Tuner
M-102 DC supply remote control
Used with SRA-25 antenna tuner
(photos thanks to Brian WA5UEK)
Transceiver
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 SSB equipment was procured
NAVSHIPS 92917
SSB-1 block diagram
used with AN/SRA-20 antenna tuner