Thomcast Communications, Inc.

Thales Broadcast & Multimedia, Inc.

Fred M Stefanik

Alvin B See

Control and filter circuits for linear power supplies, employing resistance to limit the release of stored energy and simultaneously removing the input mains AC, so as to protect a load device from damage when a high voltage fault occurs. The circuits may be used particularly in output filters for high voltage power supplies for high power transmitting tubes, such as Inductive Output Tubes used in UHF television transmitters, which must be protected from internal arcing by a controlled release of stored energy and a rapid disconnection of input power. The use of the filter circuit combined with rapid solid state switching ensures that the load is not subject to an excessive surge when a high voltage fault occurs.

Apparatus for protection of an inductive output tube (IOT) from stored energy in a linear high voltage power supply (HVPS) and its associated filter circuit during a high voltage arc

Oil cooled multistage depressed collector high power amplifier

A lifting handle temporarily attaches to the water jacket of a plug-in liquid cooled IOT to facilitate installation, replacement, or removal of the IOT. The lifting handle includes two gripping surfaces that conform to the surface of the water jacket of a plug-in liquid cooled IOT. The gripping surfaces are hinged at their rear ends and clamped with a toggle clamp at the front ends. The gripping surfaces may be shaped to provide convenient handling during installation, replacement, or removal.

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Feeding Hills, MA, United States of America

Fred M Stefanik