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.
• 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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