Editing Tube socket (section)

==Other socket styles==
There are many other socket types, of which a few are:
* '''Decal''' B10B base (IEC 67-I-41a) 10 pins with 1.02&nbsp;mm diameter in an 11.89&nbsp;mm diameter circle, e.g. PFL200
* '''Decar''' B10G base (IEC E10-73) A 10th pin added to the center of a standard 9-pin miniature base, e.g. 6C9
* '''Magnoval''' B9D base (IEC 67-I-36a) 9 pins with 1.27&nbsp;mm diameter in a 17.45&nbsp;mm pin circle diameter arc, e.g. EL503, EL509, PD500, etc. - not to be confused with...
* '''Novar''' B9E base, 9 pins with 1.02&nbsp;mm diameter in a 17.45&nbsp;mm pin circle diameter arc, one of several Compactron types, which looks similar to Magnoval (but a Novar tube in a Magnoval socket will not make good pin contact, and a Magnoval tube in a Novar socket may damage the socket).
* '''Sub-Magnal''' B11A base (American), 11-pins.  Also used as industrial relay socket and HV power supplies. Amphenol / WirePro (WPI) / Eaton 78-series, Socket (female) part number: 78-S-11.  Matching Plug (male) is part number: 86-CP-11
* '''Neo Eightar''' base (IEC 67-I-31a) 8 pins in a 15.24&nbsp;mm diameter circle
* 5-pin sub-miniature wire-ended B5A base (no socket used; e.g. EA76)

A remarkably wide variety of tube and similar sockets is listed and described, with some informal application notes, at a commercial site, Pacific T.V.,<ref>{{cite web |url=http://www.pacifictv.ca/socket.htm |title = Pacific T.V. - Vacuum Tube Sockets}}</ref> including nuvistor, eight-pin subminiature, vidicon, reflex klystron, nine-pin octal-like, 10-pin miniature (two types), 11-pin sub-magnal, diheptal 14-pin, and many display tubes such as Nixies and vacuum fluorescent types (and even more). As well, each socket has a link to a clear, high-quality picture. <!-- I'm not keen on offering commercial sites, but this is seriously exceptional! I'm a 75-year-old retired lifetime electronic tech, and several of the tube sockets, much less exotica such as 20-pin relay sockets (iirc!) were new to me. Regards, user:nikevich -->

Some subminiature tubes with flexible wire leads all exiting in the same plane were connected by subminiature inline sockets. <!-- No luck with a Google image search -- user:nikevich - Does the EA76 fit this description?-->

Some low-power [[reflex klystron]]s such as the 2K25 and 2K45 had small-diameter rigid coaxial outputs parallel to octal base pins. To accommodate the coax, one contact was replaced by a clearance hole.

Vacuum tubes for high-power applications often required custom socket designs. A jumbo four-prong socket was used for various industrial tubes. A specialized seven-pin socket (Septar or B7A), with all pins in a circle with one pin wider than the others, was used for transmitting tubes. Subminiature tubes with long wire leads, introduced in the 1950s, were often soldered directly to printed circuit boards. Sockets were made for early [[transistor]]s, but quickly fell out of favor as transistor reliability became established. This also happened with early integrated circuits; IC sockets later became used only for devices that may need to be upgraded.