thermionic valve BrE
thermionic tube AmE

This type of circuit was used for thermionic valve (tube) technology.

The design had one to two thousand thermionic valves (vacuum tubes).

Additionally, the machine used 4,200 thermionic valves that had to be replaced constantly.

They used Thermionic valve and binary representation of numbers.

"First," he said, "do you know how a thermionic valve works ?"

It used thermionic valves (vacuum tubes) to implement the logic.

It used Thermionic valve to implement switches, and decimal representation for numbers.

This machine used thermionic valves to generate a clock frequency of 125 kHz.

Secondary emission can be undesirable such as in the tetrode thermionic valve (tube).

The war increased demand for such instruments and the War Office needed experimental thermionic valves.

The invention of the thermionic valve.

The EL84 is a thermionic valve of the power pentode type.

Radio as we know it depended on the development of the vacuum tube (thermionic valve) (ca. 1906-08) which allowed amplification.

A nonode is a type of thermionic valve that has nine active electrodes.

Colossus Mark 1 contained 1500 thermionic valves (tubes).

It was made with transistors; Britain's previous experimental computers used the thermionic valve, also known as a vacuum tube.

Basically it's a thermionic valve.

It used vacuum tubes (also called thermionic valves), thyratrons and photomultipliers.

Air-traffic control equipment under repair contains TO-3 transistors instead of thermionic valves.

A tube tester is an electronic instrument designed to test certain characteristics of vacuum tubes (thermionic valves).

Examples of such devices are some tetrode thermionic valves (or tubes) and the tunnel diode.

After the war new products needed to be found and the company started to manufacture radio parts such as thermionic valves and eventually a radio.

Until the invention of the transistor in 1947, most practical high-frequency electronic amplifiers were made using thermionic valves.

Colossus used thermionic valves (vacuum tubes) to perform Boolean operations and calculations.

In 1904, John Ambrose Fleming invented the thermionic valve (vacuum tube).

Velocity Modulated Thermionic Tubes (1948)

It was also called a thermionic valve, vacuum diode, kenotron, thermionic tube, or Fleming valve.

Russell gained patents for technology related to nuclear magnetic resonance (NMR), as used in magnetic resonance imaging (MRI), thermionic tubes, and various radar technologies.

W H Eccles and F W Jordan (1918) "A small direct-current motor using thermionic tubes instead of sliding contacts," Proceedings of the Physical Society of London, vol.

During his military service he worked under the wireless telegraphy pioneer Gustave-Auguste Ferrié at the Eiffel Tower radio station, and by 1914 he had produced his first patent, relating to thermionic tubes.

Bush states that "technical difficulties of all sorts have been ignored," but that, "also ignored are means as yet unknown which may come any day to accelerate technical progress as violently as did the advent of the thermionic tube."

Semiconductors, especially integrated circuits, are extremely susceptible to the effects of EMP due to the close proximity of the PN junctions, but this is not the case with thermionic tubes (or valves) which are relatively immune to EMP.