| BFi_OPTiLAS Sales organization involved in technical selling and designing activities for RF and microwave components, fibre optics, lasers, optical instrumentation, imaging, and magnetic components. |
| Comtech_PST_Corp_ Design, develop and manufacture linear, broadband and feed-forward solid state high power amplifiers. Online specifications. |
| Continental_Electronics_Corporation Manufacture digital and analog transmitter systems. Includes product specification data . |
| Eclipse_Microwave,_Inc_ Designs and manufactures microwave mixers, detectors, limiter, filters, and multiplexers for military and space market. Site also features contact information and product descriptions. |
| Elsema_Pty__Ltd_ Manufactures transmitters and receivers for the wireless industry. PDF catalogues available for download. |
| GRE_America,_Inc Manufacture wireless LAN products, spread spectrum radio modems, broadband multiplexors, and RF Modules. Features product specifications and applications. |
| HD_Communications_Corp_ Offers a range of microwave components, and systems including attenuators, amplifiers, microwave switches, connectors, wireless networking. |
| JT_Electronics Specializing in microwave and RF telecommunications equipment, offering both repair of existing equipment and custom design and development services. |
| Leningrad_Radio_Research_and_Development_Institute Designs and manufactures a full line of broadcast and telecommunication equipment. From Russia. |
| LPN_Wireless,_Inc_ Designs and manufactures economical carrier class wireless point-to-point and mulitpoint communication links. |
| Maksat_Communications Manufacture a range of wireless networks. Operating in the frequency ranges of 2.4 Ghz to 37 Ghz. Includes product features and specifications. |
| MECA_Electronics,__Inc_ Manufacture and design of power dividers, directional and 3dB hybrid couplers, attenuators and terminations. |
| Meridian_Microwave Manufacturer and turnkey provider of point to point microwave radio systems for wireless wide area networks and voice over IP. |
| Micronetics,_Inc_ Manufacturer of RF microwave test equipment, components and subassemblies used in wireless, aerospace and defense applications |
| Microwave_Mall Listing for major manufacturers of RF and Microwave products. |
| NERA_GmbH Manufacture a range of landmobile and maritime communication products. Products include satellite phones, and radio-relay systems operating between 2 to 38 GHz . Features product brochures and manuals |
| Novacom_Microwave,__Ltd_ Offers a synergistic range of microwave products of targeted at telecommunications, industrial, defence, and GPS markets. |
| Ogier_Electronics,__Ltd_ Manufacturer, designer, and operator of high technology microwave systems. Product areas include broadband wireless, CCTV transmission and Track to Train CCTV. |
| Paratek Manufactures electronically tunable radio frequency components, including tunable filters, diplexers, oscillators and delay lines. Includes product specifications, news and events, and career opportun |
| Patex Manufacture microwave video and audio transmitters and receivers for telemedicine, informatics, marine, surveillance, and amateur radio applications. |
| Pommer_Consulting_Inc Distributor of wireless networking products and systems using laser, spread spectrum, and microwave technology. |
| Remotek_Corporation Specializes in RF wireless communication technology. Outdoor and indoor repeaters, car booster, pre-amplifier, splitter, and antennas Oem/odm business. |
| Sierra_Digital_Communications Build short haul microwave radio communication equipment operating in the millimeter wave frequency bands. Includes product specifications and application notes. |
| Signal_Technology_Corp Design and manufacture wireless broadband access microwave transceivers, ODUs and custom assemblies. |
| Star_Microwave Designs and manufactures microwave products for wireless and telecommunication industries including isolators, circulators, and power splitters. |
| Tellumat Manufacture private switching communications systems, microwave radio equipment, avionics products and systems. |
| Terrasat_Communications Manufacturer of RF/microwave assemblies for VSAT and digital microwave radio systems. Products include transceivers and amplifiers. Includes product data and specifications in pdf format. |
| Thales_Microelectronics Manufacturer of millimeter wave modules for defence applications of up to 28 GHz working on numerous major radar, ECM and missiles programmes. |
| WaveRider_Communications_Inc_ Develops and distributes network communications technology utilizing spread spectrum modems, designed to provide a communications link between Internet users and Internet providers, for primary use by |
| Welt_Wireless,_Inc Providing support for EMCEE Broadcast Products equipment and other RF fixed wireless systems, RF design, equipment repair, integration, licensing, installation, subsequent turn up of the system, and p |
| Wilmanco Manufacture a range of microwave products, including crystal oscillators, frequency multipliers, satellite receiving equipment and block down converters. Includes product guide with mechanical specifi |
| C__Bayless Represent a wide range of manufacturers and products in the southeastern United States. |
| J_A__Koerner_and_Co_ Stainless steel manufacturers agents specializing in pipe, valves, fittings, tubing, plate and bar products since 1963. |
| Ken_Jendel_&_Associates,_Inc_ Manufacturers representatives for the metal working industry supplying precision ground flat steel and drill rod. Includes online catalogs and price lists. |
| Lozon_Metal_Industries_Inc_ Represents Alsa Corporation and also supplies carbon and stainless steel and alloys, aluminum, copper and brass, and mold and tool steels. |
| Metal_Professionals Marketplace and meeting point to buy and sell metals including non-ferrous, copper, aluminum and alloys, iron, and steel. |
| Metal_Specialty MNXS is a network of companies that buy and sell prime and secondary metal inventories across the world. |
| R_M__Solleder_Company Manufacturer's Agents representing leading producers of quality Carbon, Alloy, and Stainless Steel Piping Products. |
| Steramet Manufacturer's representative dealing in copper, brass, bronze, aluminum, tin, and brazing alloys. Italy. |
| Wilson_Metal_Sales_Co_ Sales representatives for eleven tubing, pipe, bar, expanded metals and storage equipment manufacturers. |
A revolution in communication occurred with the development of the telegraph. However, the early telegraph keys used to send messages caused severe strain 
on the telegrapher's wrist - a condition now known as carpal tunnel syndrome. In 1902, inventor Horace G. Martin patented the first in a line of devices which solved the problem: the Martin Autoplex, an electro-mechanical sending device which required batteries. Two years later, Martin went into business with a group of entrepreneurs, forming the United Electrical Manufacturing Company. It was also
in 1904 that Martin filed his second patent for a new sending device which used a weighted, vibrating arm and did not require the use of a magnetic coil or batteries. This device was the basis for the first Vibroplex©. 
In 1908, the association between Martin and U.E.M. ended when the latter went out of business. However, J.E.Albright, who began a business catering to the telephone industry in 1890, began marketing the Vibroplex for Martin. On March 12, 1915, Albright filed a certificate of incorporation in New York for The Vibroplex Company, Inc. Within a few short years, Vibroplex© came to represent the best of the telegraphic, and later Amateur Radio, industry. Since 1994, the Vibroplex© Company has been owned by Mitch, W4OA, the first ham to own the firm. Today, as in all of its proud history, the heritage of Vibroplex© symbolizes the interest, camaraderie, and esprit de corps of the worldwide ham radio community. To read John Casale, W2NI's history of Horace G. Martin and Vibroplex©, please click on the following link: 
Copyright © 1996-2008 by The Vibroplex Company, Inc., all rights reserved. Text, graphics, and HTML code are protected by US and International Copyright Laws, and may not be copied, reprinted, published, translated, hosted, or otherwise distributed by any means without explicit permission. The photographs of Horace G. Martin and the original Vibroplex key used courtesy of John Casale, W2NI.
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