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Series 3400

Series 3400 Portable Communications
The Series 3400 Amplified Communication System is a self contained, portable, easy-to-operate system for rugged applications. When voice communications are necessary but background noises and/or distance make it virtually impossibile to communicate, the Series 3400 System can provide the solution. The Series 3400 System requires:
  • U3400 Master Station (amplifier/power supply)
  • Two or more noise attenuating headsets
  • Comparable number of Belt Stations
  • Every headset in the system must be plugged into a Belt Station

To expand the system to accommodate up to 32 people, you merely add the necessary Remote Junction Modules, Belt Stations and Extension Cords. The Junction Modules can be connected in any configuration to provide desired Belt Station / Headset connections because there are no "wrong" system configurations. You must preset the Impedance Selector on the Master Station to correspond to the total number of Belt Stations connected to the system. Screw-on type connectors are used throughout.
Series 3400 Communication System utilizes four conductor shielded wire, which provides effective shielding from other electrical interference caused by fluorescent lights, motors, etc. It also isolates talk line from listen line.
The Series 3400 System is ideally suited for communication on construction sites, crane operators, oil rigs, large manufacturing facilities, steel mills, mines, sporting events, concerts, racing, large open work areas, around noisy equipment, etc.

U3400
Master Station		 U3401
Remote Junction Module		 U3410
PTT Belt Station
The U3400 Master Station is the heart of the Series 3400 Communication System. It contains the power supply, amplifier and impedence selector in a single, sturdy metal box. The Master Station also has four output connectors, a 12 foot grounded power cord, roll bar / carry handle, master volume control and system on/off switch. Belt Stations can be connected to the four Master Station outputs (via extension cords if distance necessitates) to form a four man communication system. Also, Remote Junction Modules may be connected to these outputs to expand the system.
Specifications: Input 110 - 125 VAC, 50 - 60 Hz, Output 24 VDC, Max current 1/2 amp.
Dimensions: 5-3/4" X 9-1/2" X 4-3/4"		 U3401 Remote Junction Modules are used to provide additional Belt Station connections. Each can accommodate three Belt Station connections or two Belt Station connections and another Remote Junction Module or extension cord. Your requirements dictate the particular system arrangement up to a limit of 32 headsets. U3410 Belt Station features PTT (Push To Talk) or slide to lock-on microphone switch, headset jack, headset listen level control, belt clip, 12 foot straight cord with MS connector

V3412
VOX Belt Station (Voice Activated)		 Extension cords (number after dash indicates length in feet)
V3412 VOX Belt Station features Adjustable squelch control for voice activated circuit, manual PTT (Push To Talk) override switch, headset jack, headset listen level control, belt clip, 12 foot straight cord with MS connector. Speaking into the microphone on a headset activates the Belt Station, providing hands free operation Extension cords with screw on connectors are used to expand the system to cover a larger area. These cords can be used to connect all components — Master Station, Remote Junction Modules and Belt Stations.

C34-12
C34-25
C34-50
C34-100

Series 3300 Headsets (Standard)
The choice for rugged, reliable communications in high noise environments. The Series 3300 Headsets feature David Clark Company's M-1/DC Noise Cancelling Microphone
H3330
Headset / Microphone		 H3340
Headset / Microphone		 H3391
Headset / Microphone
Over the head style
Microphone: M-1/DC Amplified Dynamic (nominal 100 ohms)
Boom: Has four different adjustment points for perfect microphone placement. Can be rotated to position microphone on left for right side.
Earphone: Light Weight Dynamic (nominal 300 ohm) wired in series
Cord: 4-conductor, 28"
Plug: 2P-1643
NRR: 24dB		 Designed to be worn with safety cap. Same specifications as H3330 Single Ear. Same specifications as H3330

Series 3400 Headsets (Premium)
Your choice when comfort is a priority. Series 3400 Headsets feature David Clark Company's M-7A Noise Cancelling Electret Microphone, fully flexible boom and silicone gel ear seals
H3430
Headset / Microphone		 H3440
Headset / Microphone		 H3140
Headset / Microphone
Over the head style
Microphone: M-7A Electret (nominal 50 ohm)
Boom: Full flex for precise microphone positioning. Rotates for left or right side placement.
Earphone: Lightweight Dynamic (nominal 300 ohm) wired in series.
Cord: 4 conductor, 28"
Plug: 2P-1643
NRR: 23dB		 Designed to be worn with safety cap. Same specifications as H3430 Designed to be worn with safety cap.
Microphone: Throat microphone amplified electret element (nominal 100 ohm)
Earphone: Lightweight Dynamic (nominal 300 ohm) wired in series.
Cord: 4 conductor, 28"
Plug: 2P-1643
NRR: 23dB
H3441 Single Ear Version of H3440 (left earcup vented, no receiver
H3051 Listen only version of H3330. NRR: 24dB
H3061 Listen only version of H3340. NRR 23dB

Typical Series 3400 Applications

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