US Navy VHF and UHF Transmitters & Transceivers

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

 manuf Manson Lab

NAVSHIPS 92549
AN/GRC-27A

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The AN/GRC-27A comprises a transmitter, receiver, modulator-power supply, distribution panel, control radio set, and the mounting rack. The AN/GRC-27 is the shore version, the AN/GRC-27A is the shipboard version.

The transmitter normally generates a radio-frequency carrier in a range from 225.0 to 399.9 MHz, with a nominal power output of 100 watts over this range. The transmitter has 3 crystal-controlled oscillators (frequency generators), which employ a total of 38 crystals.

The combination and multiplication (synthesizing) of these 38 crystal frequencies make it possible to produce 1750 frequencies spaced at 100-kHz intervals from 225.0 to 399.9 MHz. Any 10 of these 1750 frequencies can be preset manually by a series of selector switch dials (calibrated in megahertz) in 100-kHz increments. Any 1 of these 10 frequencies (channels) can be selected automatically, either locally or from a remote station. Automatic selection of a preset channel is accomplished in 2 to 7 seconds by a combined autopositioner drive system and a servosystem.

The modulator-power supply provides the transmitter with all necessary operating and control voltages, and supplies amplitude modulation power (either voice or MCW tone) for the transmitter. The transmitter output includes both upper and lower sidebands generated when the carrier is amplitude-modulated.

The receiver normally operates on any 1 of 1750 frequencies, spaced at 1-kHz intervals from 225.0 to 399.9 MHz. The receiver employs a triple conversion superheterodyne system using crystal-controlled oscillators. There are a total of 38 crystals in a synthesizer system. Any 10 channels of the 1750 frequencies can be preset manually. Moreover, any 1 of the 10 channels can be selected automatically, either locally or from a remote station.

Automatic channel selection in the receiver is accomplished by a frequency selector and autopositioner system similar to that in the transmitter. A motor-driven system of gear trains operates the various crystal switches and tuning mechanisms to permit rapid change of operating frequency. Here again, channels are shifted automatically in 2 to 7 seconds.

The receiver is designed for use with directional or omnidirectional antennas having a characteristic impedance of 52 ohms. Audio output circuits for operation of loudspeakers and for operation into telephone lines are built into the receiver. A special output circuit for direction-finding applications is provided also. The receiver is equipped with automatic volume control, automatic noise limiter, and carrier-operated squelch circuits.

The preset channels for the transmitter or the receiver are selected by operating a channel selector switch on the front panel of the respective units or by telephone-type dials on associated radio set control facilities.

The radio set control unit adapts the control circuits of the AN/GRC-27A to the standard 12-wire shipboard remote control system. The control unit provides for the control of power for Radio Set AN/GRC-27A, starting and stopping the modulator-power supply, automatic channel selection in the transmitter and receiver, local or remote control of the transmitter, and squelch adjustment for the receiver.

AN/PRC-40AX
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132-152 mc, 0.8w, FM
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AN/PRC-61
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132-152 mc, 1w, FM
Motorola Z23BAC-1001AM

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prc61-1608-02.jpg (109836 bytes) NAVSHIPS 94682

 

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AN/SRC-10( ) - 20-27.9 mc
AN/SRC-13( ) includes R-108/GRC auxiliary receiver

AN/SRC-11( ) - 27-38.9 mc
AN/SRC-14( ) includes R-109/GRC auxiliary receiver

AN/SRC-12( ) - 38-54.9 mc
AN/SRC-15( ) includes R-110/GRC auxiliary receiver

no suffix - 24vdc p/s
X suffix - 12vdc p/s
Y suffix - 115vac p/s

VHF FM Transceivers 

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See here for more info

PP-1175A/SR manual pdf

    Although originally designed as an Army equipment radio transceiver, AN/SRC-10( ) is installed aboard Navy ships for short distance amphibious communication in the frequency range 20 to 27.9 mc. Its only mode of operation is FM radiotelephone, which is delivered with a selectable power output of either 2 or 16 watts. When supplemented with certain accessories the AN/SRC-10( ) becomes a portable radio set for use ashore and in boats.

Spec Sheets for all models

Components
  • RT-66/GRC (SRC-10, -13)
  • RT-67/GRC (SRC-11, -14)
  • RT-68/GRC (SRC-12, -15)
  • PP-109/GRC (12vdc p/s)
  • PP-112/GRC (24vdc p/s)
  • PP-1175A/SR (115vac p/s)
  • MX-1583/SRC (dc p/s remote control adapter)
  • MX-1986/SRC (ac p/s remote control adapter)
  • MT-299/GR mounting for SRC-10, -11, -12
  • MT-327/GR mounting for SRC-13, -14, -15
AN/SRC-17 UHF Transceiver

Spec Sheet

Installation Drawings

need photo

SRC-17 (XN-2)
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SRC-17(XN-3)
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Transmitter/receiver for NTDS use
1kw 225-400mc FSK & FM
Manson Labs (div of Hallicrafters)

NAVSHIPS 94127

AN/URC-9
AN/SRC-20
AN/SRC-21
UHF Transceiver

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AN/SRC-20

More photos & info

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AN/SRC-21

UHF transceivers
225-400 mc AM
manuf Collins

AN/SRC-20 (100 watts)
   AM-1565/URC amplifier
   AN/URC-9 transceiver
          RT-581/URC-9
          PP-2702/URC-9)
   C-3866/SRC control

AN/SRC-21 (16 watts)
   AN/URC-9 transceiver
          RT-581/URC-9
          PP-2702/URC-9
   C-3866/SRC control 

"A" version has  0.05mc channel spacing, "non-A" has 0.1mc channel spacing.

More photos & info

NAVSHIPS 0967-032-5000
NAVSHIPS 0967-125-6000
NAVSHIPS 0967-378-2000
NAVSHIPS 0967-438-9000

Contact www.wa5cab.com  for copies of the manuals above

AN/SRC-20 and AN/SRC-21
C School Trainee's Guide 1967
NAVPERS 93402-1 Information Sheets
NAVPERS 93402-2 ?
NAVPERS 93402-3 Schematics

AN/SRC-30(XN-1)
UHF SSB transceiver based on R-1051 and T-827

Probably never went into production ---
AN/SRC-31 NTDS Transceiver

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src31a-31.JPG (105381 bytes) UHF data link transceiver
225-400 mc, 0.05mc channel spacing

300w AM, 1500w CW/FSK

-
AN/URC-16( ) - 20-27.9 mc
AN/URC-17( ) - 27-38.9 mc
AN/URC-18( ) - 38-54.9 mc

no suffix - 24vdc p/s
X suffix - 12vdc p/s
Y suffix - battery and hand-cranked generator

Portable VHF FM Transceivers similar to SRC-10, SRC-11, SRC-12 urc16-17-18-01.jpg (403357 bytes)  Spec sheets and list of components

 

AN/URC-20 - 20-27.9 mc
AN/URC-21 - 27-38.9 mc
AN/URC-22 - 38-54.9 mc
Ground or Truck mounted VHF FM Transceivers similar to SRC-10, SRC-11, SRC-12 -- Spec sheets and list of components
AN/URC-80(V)
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VHF FM Maritime Transceiver -- --
AN/URT-7
AN/URT-7A
AN/URT-7B
AN/URT-7C
Transmitter

URT-7 Spec Sheets

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

  Similar to TED, but VHF

AN/WSC-3
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225-400mc transceiver  uhf-CVN74-2008.jpg (56073 bytes)
AN/WSC-3 LOS/SATCOM 225-400mc transceiver 
(aboard CVN-74)
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AN/WSC-3 LOS/SATCOM 225-400mc transceiver 
(aboard CVN-74)

WW2 era VHF and UHF transmitters

TBS, TBS-4

TBS Spec Sheets

TBS aboard USS Massachusetts
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Manual - download 110 MB pdf

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TBS-7 Receiver
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TBS transmission line filter
(CHW-53155)
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TDQ
TDQ Spec Sheets

TDQ Schematics

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TDT VHF AM transmitter VHF 115-156 mc AM
35w output
spec sheet manual

TDZ
TDZ spec sheets

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 225-400 Mc AM
10 crystal controlled channels

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TDZ Crystal pack NT-10527
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TED UHF Transmitter

TED Spec Sheets

TED-6
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UHF 225-400 mc AM
15 watts output

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NAVSHIPS 91357

Circuit Description - 4.5 MB pdf 

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TED-7 - photos thanks to Jason W6IEE
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