Navy Transmitting Control & Switchboard Info

Transmitting Key Info

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Shipboard Transmitter & Receiver Switchboard Interconnections



frq3-01.JPG (328807 bytes) Buskin Lake 1955
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Buskin Lake 1955
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Transmitter control wiring

4-wire and 6-wire control info

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transmitter - radiophone control wiring
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radio system control wiring (rcvr, xmtr, key, audio, remote control, etc.)
  Fig. 10 Navy Standard 6-Wire Remote Control Unit.
standard 6-wire transmitter control

NT-23172 Radiophone unit
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ctl-23172-02.jpg (3161256 bytes) See here for spec sheets

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NT-23211 Radiophone unit
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NT-23211 Radiophone Set

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This unit is contained in a housing suitable for bulkhead mounting, and is designed for use in place of Remote Radiophone Unit Navy Type-23500 in outside locations which are open to the weather. Access to the controls is obtained by opening the front cover, which is hinged to the unit. All controls are mounted on the front panel, including a handset. Located on the front panel are the following: MASTER START power on red indicator lamp; START ON-OFF switch controls; CARRIER ON green indicator lamp; ON-OFF KEY ORCUIT switch; NOISE SUPPRESSION NORMAL-ON switch; INCREASE EARPHONE LEVEL control; LOCAL CHEST MIC momentary panel talk switch; LOCAL CHEST MIC extension; LOCAL HEADSET jack; LOCAL CHEST SET jack.

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NT-23305 remote control unit
for TCE or TDE transmitters

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CNR-23442 transmitter control & keying unit
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"For General Radio Use"

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"Remote-Local", "Local Test", "Remote Line", "Key Circuit", "Transmitter Remote" 
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Has 1 tube, several relays, and a time delay switch
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Provides for starting and keying transmitter unit over a single pair, or one wire and ground. Transmitter starts when key is momentarily closed and remains on for a delayed time interval after last key impulse is transmitted. Key line resistance 35 DC ohms max; operates from 115/1/60. 9 watts standby, 18 watts operating, keying speed 50 words/minute. For general radio use.

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This selector unit (figure 2-38) is contained in a cast aluminum housing which is suitable for bulkhead or top-of-table mounting. A telephone dial, synchro indicator, and an OFF-ON switch are mounted on the front panel. Also mounted on the front panel is a card holder containing a set of cards on which data regarding the ten channels may be marked. A terminal tube is supplied for the cable lead, which is attached at the bottom of the case when the unit is mounted on a bulkhead, and at the back of the case when the unit is mounted on a table top. This unit, when connected into the system for which it was designed, provides remote control for either TDZ or RDZ for selection of any channel in the controlled equipment. Refer to figure 3-30. When the OFF-ON switch, S301, is set to ON, the unit may be operated for control purposes. When the dial is moved in a clockwise direction to the finger stop, the off-normal contacts dose and remain closed until the dial returns to the normal position. When the dial is released, the impulse contacts open and close to pulse an associated loop circuit in the controlled equipment. The resistor network associated with the stepper switch K116 in the TDZ transmitter is energized through various relays, and returns to the M301 indicator the necessary intelligence to operate the receiver selsyn and indicate the channel selected. Setting switch S301 to the OFF position electrically removes this unit from the system.

NT-23496 control panel
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control-23496-1207-02.jpg (424818 bytes) Controller for RDZ/TDZ channelized UHF receiver/transmitter
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manuf CQC Admiral

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All of the controls operated at this unit are mounted on the front panel. When the LOCAL/REMOTE switch, S106, mounted on the front of the TDZ Transmitter is set to REMOTE, the Control Indicator Unit may be operated. A START-STOP switch, S405, enables the transmitter to be energized or deenergized from a remote position. A red indicator lamp, I401, indicates when primary voltage is applied to the transmitter and this control unit. A key jack, J403, is provided on the front panel for the hand-key plug. Normally, MCW operation may be .accomplished only from a remote position. Two jacks, J401 and. J402, are employed for connecting a handset to the unit. RECEIVER switches S401 and S402 connects either the No. 1 RDZ/RDZ-1 or the No.2 RDZ/RDZ-1 to either or both handset jacks. Audio level controls R403 and R404 adjust the audio-level input to each of the handsets.
    A push-to-talk switch is provided on the handset for energizing the transmitter. Transformer T401 serves as the microphone input transformer, and capacitor C401 serves as a filter to isolate the d-c voltage from the audio circuit. The push-to-talk button energizes relay K401, which completes the circuit through the CARRIER ON indicator lamp, I402. This relay also disables the two speakers which may be connected to this control unit. A switch, S404, is provided to mute either one or both of the speakers.
    Channel selection for either of two receivers or a transmitter may be controlled from this unit. A telephone dial is provided for this purpose. When the unit selector switch, S403, is placed at either RECEIVER 1, RECEIVER 2, or TRANSMITTER position, the selected receiver or transmitter may be dialed for channel selection. The switch returns to its OFF or normal position after the selection is made. Three d-c selsyns, 1403, 1404, and 1405, are used to indicate which channel has been selected on any one of the receivers or transmitter. These d-c selsyns are identified with markings so that each may be associated with the. proper unit.

NT-23500 radiophone control unit
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See here for spec sheet


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ctl-23500-1607-01.jpg (250538 bytes) ctl-23500-1607-03.jpg (247138 bytes) This unit is designed for use with Remote Channel Selector Navy Type -23445. It is installed in sheltered locations. Located on the front panel are the following: TRANSMITTER START-STOP button, POWER ON red indicator lamp, CARRIER ON green indicator lamp, KEY jack, HANDSET or HEADSET jacks, PUSH TO CUT SQUELCH button, and an EARPHONE LEVEL knob.

Teletype Control

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  • shipboard use
  • located near TTY unit
  • turns xmtr off/on
  • selects AFSK (tone) or FSK (CFS)
  • manual NAVSHIPS 92279
  • wiring & operation info page

Radio Set Control
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C-1138/UR aboard USS Nautilus

Radiotelephone control panel - includes key jack and handset jack

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Manual NAVSHIPS 93152 - pdf

Manual pages - 
    operation, schematic, etc.

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C-1180/GRC-27 radio set control

need photo adapts GRC-27 to standard shipboard remote control NAVSHIPS 92175

C-1277/SR Transmitter Control

c1277-sr-01.jpg (48084 bytes) Remote power control of  2 UHF transmitters - co-located with C-1138/UR or similar radiotelephone control box.

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C-1277/SR is used with Antenna AS-668/SR and Relay Assembly RE-156/SR. Two of these antennas, each fed by a separate UHF transmitter (such as the TED-9) are mounted shipboard so as to give omni-directional horizontal coverage. 

The C-1277 allows an operator to energize one or both transmitters (only one at a time if they are on the same frequency). It is suggested that the labels "No.1" and "No.2" be replaced by "FORE" and "AFT" after installation. 

The C-1277 just has switches and indicator lamps while the RE-156 has the relays that actually control the two transmitters.

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c3868-1406-06.JPG (27906 bytes) -- --

C-9044/URC-35 remote control

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Used with AN/URC-35 transceiver

C-10206/URC-94 remote control
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c10206-urc94-02.jpg (63051 bytes) c10206-urc94-03.jpg (64420 bytes) Used with AN/URC-94 transciver

C-11922/U Remote Control Unit

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Speech Amp & Compressor

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AM-413A/G manuf American Measuring Instruments

need more info - Please let me know if you have a manual I can borrow or buy

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am413b-1408-03.jpg (285087 bytes) -- ----


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WW2 - 11-line Radiophone patch panel
in Radio 1 (Radio Central)
BB-55 USS North Carolina

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WW2 - 11-line Radiophone patch panel
in Radio 2 (Transmitter Room)
BB-55 USS North Carolina
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WW2 - 5-line Key control patch panel
in Radio 1 (Radio Central)
BB-55 USS North Carolina

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WW2 - 5-line Key control patch panel
in Radio 2 (Transmitter Room)
BB-55 USS North Carolina

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WW2 - 7-line patch panel
in Radio Room
DE-766 USS Slater

transmitter transfer switchboard

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SB-83/SRT aboard USS Torsk

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5 transmitters, 10 remotes

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These units switch 12-wire control signals -
  • Start
  • Stop
  • Indicator Lamp
  • Keying
  • 12v DC
  • Microphone
  • Carrier Control
  • Carrier Indicator

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Spec Sheet - thanks to HNSA

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transmitter control switchboard

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19 transmitters, 10 remotes
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SB-863/SRT simplified schematic
showing 2 positions of 2 switches
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Dave Cunningham repairing SB-863 transmitter control switchboard on USS New Jersey
photo thanks to BNJARS



transmitter control switchboard

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6 transmitters, 10 remotes
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SB-988/SRT manuf by Tabet