EIA Vacuum-Tube Base Diagrams

Base diagrams correspond to the codes in "Base" columns of the tube-data tables. Bottom views are shown throughout. Base connections are abbreviated as follows:

BS - Base Sleeve NC - No Connection

F - Filament P - Plate

G - Grid PB F - Beam Plates

H- Heater S - Shell

IC - Internal Connection K - Cathode

Alphabetical subscripts indicate structures in multistructure tubes.

D = diode, P = pentode, T = triode, HX = hexode

Subscript CT indicates filament or heater center tap.

Generally, when Pin 1 of a metal-envelope tube (except all triodes) is shown connected to the envelope, Pin 1 of a glass-envelope counterpart (suffix G or GT) is connected to an internal shield.

[vendors/components/z-vacuum-tubes-common.htm]• Click here to order these tube bases in

Visio format!

• Virtual Valve Website

• The complete 1951 Sylvania Tube Catalog (15MB)

• Here are tube socket dimensioned drawings.





				These tube bases are derived from the 2001 ARRL Handbook. "Tube Bases for Visio" Copyrighted by RF Cafe 2003

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