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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.

Related Pages on RF Cafe
- Tube Base Diagrams
- 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

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.

 FIG EIA Vacuum-Tube Base Diagrams - RF Cafe 3G EIA Vacuum-Tube Base Diagrams - RF Cafe 5AW EIA Vacuum-Tube Base Diagrams - RF Cafe 5AZ EIA Vacuum-Tube Base Diagrams - RF Cafe 5BA EIA Vacuum-Tube Base Diagrams - RF Cafe
5BK EIA Vacuum-Tube Base Diagrams - RF Cafe 6AM EIA Vacuum-Tube Base Diagrams - RF Cafe 7CK EIA Vacuum-Tube Base Diagrams - RF Cafe 8JC EIA Vacuum-Tube Base Diagrams - RF Cafe 8JX EIA Vacuum-Tube Base Diagrams - RF Cafe
9NM EIA Vacuum-Tube Base Diagrams - RF Cafe 9QL EIA Vacuum-Tube Base Diagrams - RF Cafe 9QU EIA Vacuum-Tube Base Diagrams - RF Cafe FIG 11EIA Vacuum-Tube Base Diagrams - RF Cafe 12FB EIA Vacuum-Tube Base Diagrams - RF Cafe
12FJ EIA Vacuum-Tube Base Diagrams - RF Cafe 12FK EIA Vacuum-Tube Base Diagrams - RF Cafe 12FY EIA Vacuum-Tube Base Diagrams - RF Cafe 12GJ EIA Vacuum-Tube Base Diagrams - RF Cafe 12GW EIA Vacuum-Tube Base Diagrams - RF Cafe
12HL EIA Vacuum-Tube Base Diagrams - RF Cafe FIG 21 EIA Vacuum-Tube Base Diagrams - RF Cafe FIG 41 EIA Vacuum-Tube Base Diagrams - RF Cafe FIG 87EIA Vacuum-Tube Base Diagrams - RF Cafe These tube bases are derived from the 2001 ARRL Handbook.

"Tube Bases for Visio" Copyrighted by RF Cafe 2003

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