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Octal sockets were designed to accept octal tubes, the rib in the keyed post fitting an indexing slot in the socket so the tube could only be inserted in one orientation. When used on metal tubes, pin 1 was always reserved for a connection to the metal shell, which was usually grounded for shielding purposes.
6V6 Octal socket basing diagram. 1 - * Unconnected in all versions except for the shell connection of the metal 6V6 2 & 7 - Filament / Heater 3 - Anode / Plate 4 - Grid 2 / Screen Grid 5 - Grid 1 / Control Grid 6 - No connection. Pin normally absent 8 - Cathode & Beam-Forming Plates. The 6V6 is a beam-power tetrode vacuum tube.
The KT88 fits a standard eight-pin octal socket and has similar pinout and applications as the 6L6 and EL34.Specifically designed for audio amplification, the KT88 has higher plate power and voltage ratings than the American 6550.
The 6П7С (6P7S) is similar to Г-807, but with an 8-pin octal base. The 807 also found some use as a horizontal output tube in early TV receivers, particularly those manufactured by DuMont . The 807 design (with some " value engineering " to reduce production cost) was the basis for the first application-specific horizontal sweep tubes such ...
For signal pentodes, an odd model number most often identified a variable-mu (remote-cutoff) tube, whereas an even number identified a 'high slope' (sharp-cutoff) tube For power pentodes and triode-pentode combinations, even numbers usually indicate linear (audio power amplifier) devices while odd numbers were more suited to video signals or ...
A vacuum tube socket with an eight-pin base; The octal, or base-8, numeral system This page was last edited on 29 ...
The EF86 [1] is a high transconductance sharp cutoff pentode vacuum tube with Noval (B9A) base for audio-frequency applications. It was introduced by the Mullard company in 1953 [2] and was produced by Philips, Mullard, Telefunken, Valvo, and GEC among others. It is very similar electrically to the octal base EF37A and the Rimlock base EF40.
The EL84 is smaller and more sensitive than the octal 6V6 that was widely used around the world until the 1960s. An interchangeable North American type is the 6BQ5 (the RETMA tube designation name for the EL84). The EL84 was developed to eliminate the need for a driver tube in radios, so it has rather more gain than is usual in a power pentode.