valve push tube
51Vacuum — This article is about empty physical space or the absence of matter. For other uses, see Vacuum (disambiguation). Free space redirects here. For other uses, see Free space (disambiguation). Pump to demonstrate vacuum In everyday usage, vacuum is… …
52Citroën 2CV — Manufacturer Citroën Production 1948–1990 [1] …
53Wrench — For other uses, see Wrench (disambiguation). A set of chrome vanadium metric wrenches, open at one end, box/ring at the other. This type is commonly known as a combination wrench. A wrench or spanner is a tool used to provide grip and mechanical… …
54Bicycle pump — A bicycle pump is a type of positive displacement pump specifically designed for inflating bicycle tires. It has a connection or adapter for use with one or both of the two most common types of valves used on bicycles, Schrader or Presta. A third …
55Williamson amplifier — A Williamson amplifier refers to a type of vacuum tube (valve) amplifier whose circuit design is similar to that originally published by D.T.N. Williamson. Contents 1 Explanation 2 Description 3 See also 4 References …
56GU-50 — The GU 50, (Russian: ГУ 50) is a power pentode vacuum tube intended for 50 Watt operation as a linear RF amplifier on frequencies up to 120 MHz. It is in fact a Soviet produced copy of the Telefunken LS 50 power pentode, possibly reverse… …
57Ultra-Linear — is a term used to describe a type of electronic circuit that is used to couple a tetrode or pentode vacuum tube (also called electron valve ) to a load (e.g. to a loudspeaker).The circuit was developed by Alan Blumlein and patented in 1937 (… …
58Toilet — This article is about a sanitation fixture used primarily for the disposal of human excrement. For a room containing a toilet, see toilet (room). For other uses, see toilet (disambiguation) …
59Beam tetrode — The problem of secondary emission in the tetrode tube (valve) was solved by Philips/Mullard with the introduction of a suppressor grid to produce the pentode construction. Since Philips held a patent on this design, other manufacturers were keen… …
60Escape trunk — An escape trunk is a small compartment on a submarine which provides a means for crew to escape from a downed submarine; it operates on a principle similar to an airlock, in that it allows the transfer of persons or objects between two areas of… …
