Profile: National Electronic Devices Ltd. designs and develops all cable TV products that include trunk, bridger and line amplifiers. Our PLP series line passives are designed and manufactured with advanced technology to provide performance from 5 to 1000 MHz minimum, and to be equal to, or surpass existing technology. PLP series line passives are protected from severe weather, temperature extremes, and corrosive atmosphere, with a polyester powdercoat finish on exposed surfaces of the housing, and faceplate made of die-cast aluminum alloy 360.