For more information, call Western Safety Products at 206-264-0808 or email sales@westernsafety.com.
Voice Powered Communication System
| Your voice provides all the power required for communication. Most communication systems require an AC or DC power source. David Clark Company's Voice Powered system only requires your voice to generate the power needed. It is a more sophisticated mechanical version of two tin cans connected by a string. When you speak, your voice travels to a transmitter causing fluctuations in a magnetic circuit. This creates a small amount of current (approx. 20 miro amperes) which is enough to operate the recievers on up to six headsets. In its simplest application, a voice powered system can be just two headsets and a jumper cord. When greater distance is required, you add extension cords. For fixed applications, you add jack plates and cords. It's that simple. You need no external power, batteries or electricity. For portable applications up to six people, use a junction box. When proper conditions exist, two way communication is possible for miles. Voice powered communications is a simple, low cost, maintenance free system that is ideal for two to six people in moderate noise environments. |
| Sound waves strike the transmitter diaphragm and make it vibrate. Attached to the diaphragm by a shaft is a cantilever type armature which vibrates with the diaphragm. The armature is encircled by a coil of wire and is suspended between the extended poles of a pair of powerful magnets. When the armature vibrates, it moves alternately toward one pole and then the other, causing the magnetic flux to be diverted through the armature, first in one direction and then in the opposite. The expanding and collapsing magnetic field thus created sets up an EMF in the coil of wire. The current thereby generated (approximately 20 micro amperes) travels to all the receiver elements tied together by wire, where sound waves are recreated by a reversal of the above process...and you communicate. |
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| H5010 Headset with noise shielded microphone |
H5030 Headset with acoustic boom |
H5090 Headset with acoustic boom |
| A push to talk switch is located on the microphone shield. Recommended for noise levels to 125dB MSHA approval # 9B-67 |
Boom allows hands free operation. The symmetrical design allows the headset to be worn with boom on either side of the head. Recommended for noise levels to 100dB MSHA approval # 9B-67 |
Single ear version of model H5030. Recommended for noise levels to 80dB MSHA approval # 9B-67 |
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| H5020 Headset with noise shielded microphone |
H5040 Headset with Acoustic Boom |
H5042 Headset with Acoustic Boom |
| Behind the head version of H5010. Has soft adjustable overhead strap that fits under safety cap. Recommended for noise levels up to 125dB MSHA approval # 9B-67 |
Behind the head version of H5030. Has soft adjustable overhead strap that fits under safety cap. Recommended for noise levels up to 100dB MSHA approval # 9B-67 |
Behind the head version of H5030 and designed for use with breathing apparatus. Has soft adjustable overhead strap that fits under safety cap. Recommended for noise levels up to 100dB MSHA approval # 9B-67 |
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C51-12 C51-25 C51-50 C51-100 |
Extension cords are two conductor cords with phone plug and phone jack. Extension cords are used to extend distance from jumper cord, jack plate or junction box. May be coupled for longer length. Number after dash indicates length in feet. |
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C-52-12 C52-25 C52-50 C52-100 |
A jumper cord is all that is required to complete a two-man voice powered system. It is a two conductor cord with phone jacks at each end. Headsets plug directly into jumper cord. System can be lengthended further by adding extension cords to jumper cord. Number after dash indicates length in feet. |
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C5401 | Adapter cord assembly. Accepts headset plug and terminates in two vinyl insulated clips. Designed especially for pulling and pairing wires, performing continuity checks and isolating other line problems. |
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9143P-26 | Headset Carry Case. Will accommodate two headsets and 200 feet of jumper cord. Durable plastic with carry handle, two snap latches. |
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M5002 | Jack Plate. Two outlets with mating jacks and weather resistant covers. Receives plug from headset or extension cord. Face plate with jacks fits utility box. Can be used for fixed installations with multiple stations. |
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M5006 | Junction Box. A heavy duty metal box with six jacks and weather resistant covers. Accommodates up to six plugs from headsets or extension cords. The heart of a portable system. |
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M5410 | Amplifier / Belt Station. Amplifier increases the volume of transmissions from the user's headset by up to 30dB. Includes adjustable talk level and a Push-To-Amplify Switch. For use with models H5030, H5040 AND H5090 Headsets. Adapter cable assembly included. |
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K5501 | Communication Kit. This prepackaged voice powered communication kit provides a ready to use, easy to store, two-man communication system for Instrumentation, Linemen, Electrical Contractors, Computer Technicians, Telephone Servicemen and General Contractors. As packaged, the kit is ideal for use in pulling and pairing wires, performing continuity checks (ringing out wires), calibrating instrument readings, isolating line problems or simply providing a means of communication in a noisy environment. Packaged in its own compact carrying case, the kit includes two each H5040 voice powered headsets and adapter cords (C5401) and one each 50 foot Jumper cord (C52-50). |
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Two Man System The jumper cord, when used between any two David Clark voice powered headsets make a complete communication system. Extension cords may be added to increase length |
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Multiple Station Installation Any number of jack plates may be wired together with two conductor unshielded cable for fixed multiple station installations. Headsets or extension cords are then plugged into jack plates to complete system. |
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Multiple Headset Installation Junction box has six outlets to accommodate up to six headsets or extension cords for portable communication systems. |
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Headsets with Amplifier When a headset user is in an extremely noisy environment (over 100dB) his ability to hear normal voice powered transmissions may be hindered. Headset users communicating to him use the amplifier to increase their transmission volume (talk level) to his headset. |
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