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Like no other protective device in the world for RF coaxial cable lines, Morgan’s M-300 Series arrestors offer a complete, nearly perfect blocking/shunting system for induced voltages. Whether produced by lightning (directly or indirectly coupled), wind, rain, or snowfall MMI arrestors are continuously active, constantly draining transmission line center conductor to ground. The result? Solid protection for station equipment and related noise.

All M-300 Series units feature heavy discharge toroidal inductors used to neutralize developed voltages on the antenna side of a central high-voltage blocking capacitor. Inert gas tubes are used to limit the natural back-EMF voltages often induced across an inductor when large fast rising input currents are presented to the unit.

Sold and used worldwide, our arrestors are the first line of defense in lightning protection employed by such services as the U.S. Army, Boeing Corporation (Commercial Airplane Division), AT&T, NASA, and a wide variety of Commercial Broadcast, Public Safety, Emergency Relief, Government, and Amateur interests. Our arrestors can be found in the most stark surroundings, from dense African jungles to the vast wastelands of some of the world’s most punishing deserts. You can even drive a truck over the top of the chassis without damaging the contents (actually, you can do that to most MMI products).

Available models cover the frequency range from as low as 100KHz to 1,000MHz. with lots of connector choices. All units feature Teflon connectors. All may be mounted on flat surfaces, grounding bulkheads, or through-mounted using dual stainless steel grounding screws for mechanical fastening. Packaged with an informative owner’s manual.  The arrestors are approx 3X3X2 inches.

Unshielded control line conductors used to operate remote switching operations, antenna rotators, and home weather stations are easily charged to thousands of volts potential referenced to ground by overhead lightning discharges, frequently causing severe damage to equipment. In the RF transmitting environment, these same leads often couple into transmitted energy and re-radiate signals at ground level, resulting in interference to nearby equipment tuned to other services.

Model 348 solves both problems in one convenient unit. Easy to install and virtually permanent, this suppressor shunts RF currents and voltages over 50V directly to facility ground terminal connection.

Installation is a breeze and takes only a few moments. Each wire (up to 8 conductors on standard models and 12 conductors for the B models) entering from rotating unit or switch box may be attached to any of the 8/12 insulated terminals on the side of the unit. The same wire then continues from that connected point onward to control box destination. Connect the metal case to a ground rod or system and you’re all set. May be used indoors or outdoors, designed for flat surface mounting, includes stainless steel grounding terminals.

Uses metal oxide varistor devices, AC or DC voltage rated, ceramic high-capacity RF bypassing components.  Comes with owners manual.

Most modem electronic equipment devices are subject to interference from electromagnetic signals and noise entering via AC line power cords. DVD and Video cassette recorders, television sets, consumer audio gear and many telecommunications products are now being constructed with transformerless power supply technology, making each piece more sensitive than ever to line variations and interference. AC line filters offer an inexpensive alternative to the risk and unpleasantry of dealing with many types of line problems. MMI’s line filters are a complete package of inductive isolation, overvoltage control, capacitive decoupling, and interference control of both common mode and differential mode signals across a broad frequency spectrum range. Several models offer currents to 40 Amps and up to 6 plug-in outlets.

Filters are constructed in a tough, single piece heavy chassis measuring 4″ square, and each includes 6 foot molded line cord, fuse (replaced if necessary from the outside), and stainless steel ground terminal. Models for 120VAC are outfitted with General Electric triple tap outlet so that 3 or 6 cords may be plugged into the unit, 2 or 3 wire versions available.

All are designed for flat surface mounting and may be used with or without ground terminal connection. Performance improves if local ground connection can be made and if distance from filter body to ground is kept short.  Each unit is packed with a informative owner’s manual and an extra fuse.

Modern television and FM stereo systems are the most delicate ever built and can be easily damaged by voltage transients delivered by outside antennas or commercial cable systems. Cable companies offer little, if any, lightning protection and are not responsible for resultant damage when it occurs. Model 310, 311, 312, and 315 offer do-it-yourself protection and easy installation in just about any home or institution based system. Each is completely shielded and constructed in an aluminum case for indoor/outdoor services. The only other installation requirement is a ground rod earth terminal connected to the chassis.

Model 315 employs hybrid circuit of both gas discharge device and metal oxide varistors for fast attack speed, DC voltage passive up to 50 volts non-polarized, screw-in “F” connectors standard Frequency range 900-1500 MHz, 75 ohms impedance.

Other Morgan units available upon request.

MMI’s model M-330 is a structural protection assembly that offers transient and overvoltage protection throughout the house or structure to items connected on the AC power lines connected through circuit breaker protection to the main incoming electrical panel. This unit requires only simple wire connections done in about 5 minutes time. Once installed unit provides diversion to incoming high voltage wavefronts by attacking transients and providing a safe leakage path to ground for the duration of intermittent spike events occurring to power lines outside the facility. The unit is inert during normal operation but provides filtering of electromagnetic signals which often cause noise and interference to household electronic equipment. Circuit is a hybrid design utilizing gas discharge and metal oxide varistor technology with bypass devices for RFI / noise filtering. Maximum 60,000 Amp fast switch capacity. Case is at ground potential and safe to handle anytime. Housing is standard MMI heavy chassis, fully shielded, burst-proof design.

Unshielded telephone wiring is very susceptible to natural and man-made interference as well as over voltage influence. Modern solid-state telephone equipment, computer modems, telephone patches and interconnection equipment and DSL modems are all easily damaged by fast rising transients caused by lightning discharges and electromagnetic fields.

Model 340 Series suppressors/filters are combination multi-stage units that isolate telephone circuits, providing hybrid dual-action voltage protection with gas-discharge and metal oxide component, and noise/RF filtering by twin-stage decoupling bypassing. May be installed indoors or outdoors at telephone line junction connections to building entry, for overhead or buried lines.

Measuring (HWD) 1 1/2" X 3" X 3", models are available for direct hardwiring with screw terminals or all modular. Both are 4-wire and designed for one or two line services, polarized (input and output), work with any telephone brands or models. Ground terminal connection required to nearby ground rod or earth electrode. Units are fully shielded assemblies in standard Morgan Mfg. heavy chassis, packed with 4-page owner's manual. Weight 1 pound.

Penetrox-A anti-oxidant connection grease.  For all aluminum to aluminum and aluminum to copper connections.  Prevents oxidation, corrosion and improves conductivity between arrestors and copper (or aluminum) sheet.  Also great for antenna element construction.  Available in 2oz. and 8 oz. containers.

Similar to the M-340 Telephone Line Protector, model M-340-2 Series suppressors/filters are combination multi-stage units that isolate telephone circuits, providing hybrid dual-action voltage protection with gas-discharge and metal oxide component, and noise/RF filtering by twin-stage decoupling bypassing. Units are suitable for power over ethernet (PoE) ,and may be installed indoors or outdoors at telephone line junction connections to building entry, for overhead or buried lines.

Measuring (HWD) 3" X 4" X 3", models are available for direct hardwiring with screw terminals.  Ground terminal connection required to nearby ground rod or earth electrode. Units are fully shielded assemblies in standard Morgan Mfg. heavy chassis, packed with 4-page owner's manual. Weight 1 pound.