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Immagini della valvola

Piedinatura e collegamenti

Base: B8B - Loctal-8, B8G (Sylvania, 1938) (Codex=Waa) (8 pin)

PinFunzione
1h
2a
3g2
4g3,s
5nc
6g1
7k
8h
Note tecniche
  • The Philips 21- "Key Base" tubes were initially designed in 1940 with the 9-pin base B9G like the EF50.
  • The later series production from 1942 on however was changed to the 8-pin Locktal-base B8G designed by Sylvania.

Dati elettrici

Filamento

Tensione filamento Vh
6.3 V
Corrente filamento Ih
0.2 A

Datasheet PDF

PDF Language Pages Manufacturer
EF22.pdf cs 10 Tesla
EF22.pdf en 5 Philips
EF22.pdf de / fr 3 Philips
EF22.pdf de / en / fr 8
EF22.pdf nl 5 Philips

EL84 ECC83 12AX7 EL34 6L6GC 300B KT88 GZ34

123,884 Catalog valves
19,396 Stored valve datasheets

How to use the Valve Archive

EnryLab Valve Archive allows you to search for PDF datasheets and technical documentation by entering the exact code of a vacuum tube. Enter codes such as EL84, ECC83, 12AX7, 6L6GC, or 300B to view variants, manufacturers, and documents available in the technical archive. The search uses exact matches, thus avoiding partial or irrelevant results and making it easier to find the correct datasheet.

Datasheet PDF and frequent searches

The most searched acronyms have dedicated and indexable pages, with clean URLs and linked documentation. You can start with frequent searches to quickly consult the most used valves in the audio, radio, and technical restoration fields.