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39 – Remote-cutoff pentode, UX5 based (Commonly branded as 39/44). 41 – Power pentode, Early UX6 based version of octal type 6K6G, and Loctal type 7B5. 42 – Power pentode, Early UX6 based version of octal type 6F6G, Except for heater, similar to types 2A5 and 18. 44 – Similar to type 39, see type 39 above.
RMA tube designation. RMA 1P21 photomultiplier tube. In the years 1942-1944, the Radio Manufacturers Association used a descriptive nomenclature system for industrial, transmitting, and special-purpose vacuum tubes. The numbering scheme was distinct from both the numbering schemes used for standard receiving tubes, and the existing transmitting ...
A vacuum tube, electron tube, [1][2][3] valve (British usage), or tube (North America) [4] is a device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied. The type known as a thermionic tube or thermionic valve utilizes thermionic emission of electrons from a hot ...
Mullard–Philips tube designation. In Europe, the principal method of numbering vacuum tubes ("thermionic valves") was the nomenclature used by the Philips company and its subsidiaries Mullard in the UK, Valvo (de, it) in Germany, Radiotechnique (Miniwatt-Dario brand) in France, and Amperex in the United States, from 1934 on.
V (Russian: В) – Vacuum tube with secondary emission. L (Russian: Л) – Nonode. Ye (Russian: Е) – Magic eye tube (e.g. used as a tuning indicator). U (Russian: У) – Power triode (was soon deprecated). The 3rd element is a number – a series designator that differentiates between different devices of the same type.
8 - Cathode & Beam-Forming Plates. The 6V6 is a beam-power tetrode vacuum tube. The first of this family of tubes to be introduced was the 6V6G by Ken-Rad Tube & Lamp Corporation in late 1936, [1] with the availability by December of both Ken-Rad and Raytheon 6V6G tubes announced. [2]
A Nixie tube (English: / ˈnɪk.siː / NIK-see), or cold cathode display, [1] is an electronic device used for displaying numerals or other information using glow discharge. calculator. Inside a broken Nixie tube. The glass tube contains a wire-mesh anode and multiple cathodes, shaped like numerals or other symbols.
Service. Audio. Socket connections. B9A (Noval) The EL84 is a vacuum tube of the power pentode type. It is used in the power-output-stages of audio-amplifiers, most commonly now in guitar amplifiers, but originally in radios. The EL84 is smaller and more sensitive than the octal 6V6 that was widely used around the world until the 1960s.