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EF12spez.

Country:  Germany      Brand:  Telefunken Deutschland (TFK) 
  Tube type:  Vacuum Pentode   RF/IF-Stage 
Tube ID = 18600
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Identical to EF12spez.
Similar Tubes Multiple differences or of other kind:
 EF12

Base German Steel Y8A, 1938
Was used by Radio/TV-reception etc.
Filament Vf 6.3 Volts / If: 0.2 Ampere / -: Indirect / -: Parallel / series AC/DC /
Description Special version as FM-IF amplifier w/ metal envelope connected to separate pin.
AVO Test data indicates 25% lower Gm. 
Text in other languages (may differ)
Tube prices 2 Tube prices (visible for members only)
  ef12s.gif
  Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus
ef12spez1.jpg
B.N.
Bernhard Nagel

 
ef12s.png
Lorenz Empfänger-Röhren , 9. Auflage
Michael Sigmund

 
ef12s.png
Lorenz Empfänger-Röhren , 9. Auflage
Michael Sigmund

Usage in Models (calculation each 25th of the month)   2= 1949 ; 2= 1950 ;
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):   4
No further Information for

EF12spez.    

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