Base diagrams correspond
to the codes in "Base" columns of the tube-data tables. Bottom views are shown
Base connections are abbreviated as follows:
BS - Base Sleeve NC - No Connection
Filament P - Plate
G - Grid PB F - Beam Plates
Heater S - Shell
IC - Internal Connection K - Cathode
Alphabetical subscripts indicate structures in multistructure tubes.
D = diode, P = pentode, T = triode, HX
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.
Related Pages on RF Cafe
- A Course in
Radio Fundamentals-Vacuum Tubes
Sep 1942 QST
Electrons on Parade
Tube Production Video by RCA c.1942
NEETS Module 6 - Vacuum Tubes
- Vacuum Tube Vendors
here to order these tube bases in
Virtual Valve Website
• The complete
1951 Sylvania Tube
• Here are
tube socket dimensioned drawings.