Editing Tube socket (section)

=== Duodecar base ===
The '''Duodecar''' B12C base (IEC 67-I-17a) has 12 pins in a 19.1&nbsp;mm diameter circle and dates from 1961. It was also called the [[Compactron]] T-9 construction/E12-70 base<ref>Sylvania Receiving Tubes Technical Manual, 14th Edition</ref> It is generally similar in form to a Noval socket, but larger. In the center is a clearance hole for a tube evacuation pip, which is typically on the bottom of a Compactron tube. <!-- also CRTs, fairly sure. Regards, user:nikevich --> (It should not be confused with the similar-sounding but differently sized '''Duodecal''' B12A base.)