Each Series 3800 Vehicle Intercom System is customized to your requirements and budget. Contact your Regional Manager or call David Clark Company at: 1-800-900-3434 for design assistance.

U3800 MASTER STATION
The "heart" of the system. One each is required per system. The U3800 will accommodate two headsets and should be placed where radio transmit function is not required.
Adjusts automatically for 12 or 24 VDC power source. Contains system on/off, master volume control, two headset jacks with listen level controls, power input connector, and two remote output connectors. Draws less than 600 milliampere current.
8-1/4"L x 5-3/4"W x 4-3/4"D.
Notes for use: One each required for system. Place where radio transmit function is not required. Will accommodate two headsets.


U3801 REMOTE HEADSET STATION
This simple headset station is used to expand the system, usually at the end of a series of headset stations. There are no output connectors to connect additional modules. It has one headset jack and a listen level control. Use where radio transmit is not required.
3-1/4"L x 4-3/4"W x 3"D.
Notes for use: Intercom position only. Use at the end of intercom chain. Use where radio transmit function is not required.


U3802 REMOTE HEADSET STATION
Expands the system beyond the master station. Contains one headset jack and listen level control, system input connector, and two system output connectors. Provides a path for "daisy-chaining" to additional headset stations.
5-3/8"L x 4-1/4"W x 3"D.
Notes for use: Intercom position only. Connections provided for "daisy-chaining" to additional headset stations. Use where radio transmit function is not required.


U3803 REMOTE JUNCTION MODULE
Is a passive module containing four identically wired connectors for expanding the number of headset stations utilized in the system. A U3803 may be added to the system wherever C38-XX Jumper Cords are to be interconnected.
5-1/4"L x 5-1/4"W x 2-3/8"D.
Notes for use: Passive module with four inputs/outputs for connecting jumper cords to additional headset stations.


U3805 RADIO CORD JUNCTION MODULE
Recommended for systems utilizing two or more radio interface headset stations. It is a passive module that permits multiple Series 3800 Radio Interface Modules (a maximum of four) to be connected to one radio. The U3805 provides one output to a mobile radio, one primary input from a Series 3800 Radio Interface Module, and three secondary inputs from Series 3800 Radio Interface Modules.
6-3/4"L x 5-1/4"W x 2-3/8"D.

Note: With modification, the U3805 also accepts input from Model C3019 Utility Radio Adapters.
Notes for use: Recommended for cleaner installation of systems containing two or more radio interface headset stations.


U3806 DUAL HEADSET INTERCOM STATION
Expands the system beyond the master station. Contains two headsets jacks, each with listen level control, system input connector, and two system output connectors. Provides a path for "daisy-chaining" to additional headset stations.
6-3/4"L x 4-1/4"W x 3-1/16"D.
Notes for use: Same as U3802, but accommodates two headsets.


U3810 RADIO INTERFACE MODULE/PTT
Adds the transmit and receive functions of a mobile radio to the David Clark Series 3800 Intercom System. Use of this module is recommended for two- or three-person systems only. The U3810 has one radio push-to-talk (PTT) switch, one system output connection, one radio input connection and two connectors for optional remote PTT.
6-1/4"L x 5-1/4"W x 2-3/4"D.
Note: All intercom traffic is transmitted when PTT is engaged.
Notes for use: For applications where PTT brings all intercom communications over radio. Usually utilized in small (two-three person) systems.


U3811 RADIO INTERFACE MODULE
Provides isolated radio transmit function for one headset and radio receive function for all users. Contains one radio PTT switch, one headset jack and listen level control, one system input connection, and one radio input connection.
5-1/4"L x 3-5/8"W x 3-1/16"D.
Notes for use: For location requiring radio transmit function that does not require "daisy-chaining" to an additional headset station.


U3812 DUAL RADIO INTERFACE MODULE
Designed to connect two separate radios to a David Clark Series U3800 Intercom System. The priority reception feature enables the user to select which radio's receive audio will have precedence by simply connecting the priority radio to the priority radio input connector. Contains one C38-XX system connector, two connectors for radio input (C3821), and two connectors for optional remote PTTs.
8-1/2"L x 5-3/4"W x 4-1/8"D.
Note: All intercom traffic is transmitted when PTT is engaged.
Notes for use: For systems requiring interface to two radios. Select override feature allows one radio's receive audio to override the second radio's receive audio.


U3813 REMOTE INTERFACE MODULE (use with H7042 Headset only)
Is designed to combine the transmit/receive functions of a mobile radio with the David Clark Series 3800 Intercom System. The U3813 contains one headset jack, one listen level control, one PTT switch, one radio input connector (C3821), two intercom connectors (C38-XX) and a remote PTT connector that allows the use of an optional Footswitch (40071G-04) or other remote PTTs.
7"L x 4-1/3"W x 3-1/8"D.
Note: The U3813 Radio Interface Module and the U3817 Remote Headset Station are the only Series 3800 Modules that accept the H7042 Headset. The H7042 Headset is designed for use with certain older portable radios and requires a David Clark Company 7000 Series Adapter specific to the portable radio brand and model.
Notes for use: Compatible with headsets used for certain portable radios. Low Impedance. (Use with 7000 Series Headsets only.) See above note.


U3814 MULTI RADIO INTERFACE MODULE
Is designed to connect up to four radios to a David Clark Series 3800 Intercom System. Contains one headset jack with listen level control, one radio volume control, one four-position radio select switch, one radio PTT, four connectors for radio input (C3821), two system connectors (C38-XX), one connector for speaker cut-out option, and one connector for optional C3023 Belt Station, Footswitch (40071G-04), or other remote PTT. A red LED indicator over the PTT switch will light, indicating transmission over the selected radio. Provides isolated radio transmit function for one headset and radio receive function for all users on the system.
8-1/2"L x 5-1/4"W x 3-1/8"D.
Notes for use: Use U3814 for location requiring transmit function over three or four radios.


U3815 RADIO INTERFACE MODULE
Combines the transmit/receive functions of a mobile radio with the David Clark 3800 Intercom System. This module has one headset jack with listen level control, one PTT switch, one radio input connector (C3821), two intercom connectors (C38-XX) and one connector allowing use of an optional Footswitch (40071G-04) or other remote PTT.
7"L x 4-1/3"W x 3-1/8"D.
Notes for use: Same as U3811 but provides additional connector for daisy-chaining to additional headset stations. Also allows use of 40071G-04 footswitch.


U3815A RADIO INTERFACE MODULE
Same feature as U3815, but remote PTT connection will accept 40071G-04 Footswitch or C3023 Belt Station.
7"L x 4-1/4"W x 3-1/8"D.
Notes for use: Same as U3815 but allows use of C3023 PTT belt station. For locations requiring user's mobility; C3023 belt station has 15' coil cord and radio PTT.


U3816 DUAL RADIO INTERFACE HEADSET STATION
The standard choice when connecting the 3800 Intercom System to two radios. Provides two connectors to mobile radios (C3821), two intercom system connections (C38-XX), one headset jack with listen level control, two radio receive level controls, two PTT switches and two remote PTT connections (corresponding to each of the mobile radios). The remote PTT connectors will accept C3023 Belt Stations or Footswitches (40071G-04).
8-1/2"L x 5-1/4"W x 3-1/8"D.
Notes for use: Standard choice for system interface to two radios. Only headset plugged into headset station will be heard over radio when PTT is engaged.


U3817 REMOTE HEADSET STATION (use with H7042 Headset only)
Expands the system beyond the master station. Contains one headset jack and listen level control, system input connector, and two system output connectors. Provides a path for "daisy-chaining" to additional headset stations.
5-3/8"L x 4-1/4"W x 3"D.
Note: The U3813 Radio Interface Module and the U3817 Remote Headset Station are the only Series 3800 Modules that accept the H7042 Headset. The H7042 Headset is designed for use with certain older portable radios and requires a David Clark Company 7000 Series Adapter specific to the portable radio brand and model.
Notes for use: Same as U3802 but must be used only with 7000 Series headsets. Use where radio transmit function is not required. See above note.

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