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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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About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2025
Webmaster: Kirt Blattenberger,
   BSEE - KB3UON - AMA92498

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a lady's voice announced "You've Got Mail" when a new message arrived...

Copyright  1996 - 2026

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

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