Machlett Laboratories

Machlett Laboratories was a Northeastern United States-based company that manufactured X-ray and high-power vacuum tubes.

The company began as E. Machlett and Son, which was founded in 1897 in New York City, United States as scientific glass makers.

Raymond was president of the company, founded by his father Robert, a scientist who made the first practical X-ray tube in America and devoted his life to making it safe and successful in the field of medicine.

Among their achievements was a counter made by them for Irene and Frederic Joliot-Curie for use in their experiments on artificial radioactivity in 1934 which is currently contained in the Science Museum in Great Britain.

And tetrodes can be screen-grid modulated, especially in a Sainton-modified Doherty amplifier,[4] where both the "carrier" and "peak" tubes may be operated in Class C.[5] 6697s were also employed in RCA's upgraded Ampliphase transmitter, the BTA-50H.

Towards the end of the time of manufacture, they were producing oil-circulating X-ray tubes with a heat exchanger attached (for use with computed tomography (CT) scanners), with 5-inch diameter rotating anodes formed from tungsten-rhenium alloy and molybdenum, with a large mass of graphite attached to act as a heat sink.

The manufacture of X-ray tubes was licensed to two other companies, GEC Medical and Comet SA of Bern in Switzerland.

The Machlett X-ray tube was produced to ‘provide electrostatic protection for the filament (cathode) so as to permit long life to be achieved at operating voltages in the range 100-300 kV’ i .

The American company, which was established in New York 1897, began as a single shop and soon grew into an internationally recognized firm.