U3811 Radio Interface Headset Station by David Clark Company

Companies & Organizations:

United States of America

David Clark Company
360 Franklin Street
Worcester, MA 01604

The Series 3800 Vehicle Intercom System is engineered to solve the problem of communicating in high-noise environments with a mobile vehicle platform. Fire apparatus, rescue vehicles, ambulances, command and control vehicles, airline deicers and paint stripers are but a few applications that currently benefit from the Series 3800 system.


The U3811 is designed to provide isolated radio transmit function for one headset and radio receive function for all users within the Series 3800 Intercom System.


It contains one radio PTT switch, one headset jack and headset listen level control, one system input connection and one radio input connection. It is designed for use at the end of a series of headset stations, as there are no available connections for “daisy-chaining” additional modules.


With a modular design, rugged and weather-resistant enclosures, and functional versatility, the Series 3800 intercom system is an ideal solution for any mobile environment requiring crisp, clear communication and effective hearing protection




Expands the system, usually at the end of a series of Headset Stations

Accommodates one Headset

Provides isolated radio transmit capability for the Headset user at this position only, as well as radio receive from the connected radio for all users

There are no output connectors for "daisy-chaining" additional modules

Simple installation

One system input connector (C38-XX)

One radio input connector (C3821)

Headset jack

Listen level control

Radio transmit momentary PTT switch


Technical specifications


Power Requirements                      12 or 24 VDC (via U3800)

Enclosure                                        Heavy-gauge polycarbonate (-80° to +212°F)

Radio Input                                     1 each, via C3821 Radio Interface

Connection                                      Cord

System Input Connection                1 each, via C38-xx Jumper Cord

Headset Interface                            12B Jack, ¼” (w/ sealed spring lid)

Volume Control                                1 each Headset listen level control

Installation                                        Surface mount (mounting kit included)

Weight                                             11.9oz./337g

Dimensions                                      6-¾”L x 5-¼”W x 2-3/8"D

Defense Products & Services: U3811 Radio Interface Headset Station by David Clark Company
Companies & Organizations: 
Defense Products & Services Sectors: Communication equipment, ground-based
Description: U3811 Radio Interface Headset Station
Source of Information: David Clark Company Incorporated