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12A7

Information - Help 
ID = 3703
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  HalfWave Rectifier-BeamPowerTetrode 
Identical to 12A7 = CV909 = NU-12A7
Similar Tubes
Multiple differences or of other kind:
  EK1000
First Source (s)
Dec.1933 : 70 Years of Radiotubes and V.
Successor Tubes 25A7   32L7   70L7GT  

Base 7-Pin-Base U7A = small, old, USA (Codex=Ma)
Filament Vf 12.6 Volts / If 0.3 Ampere / Indirect / Parallel / series AC/DC
Description Output tube + Halfwave rectifier 
Text in other languages (may differ)
Tube prices 1 Tube prices (visible for members only)
Information source Essential Characteristics, GE 1973   
  12a7.png
  12A7: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
 
12a7~~1.jpg
12A7: common type USA
Georges Werts

 
486.png
12A7: Telefunken Werkstattbuch
Wolfgang Bauer

 
12a7.png
12A7: Raytheon Databook 1937
Emilio Ciardiello


from Just Qvigstad

Usage in Models 2= 1933?? ; 2= 1933 ; 4= 1934? ; 10= 1934 ; 2= 1935?? ; 3= 1935? ; 6= 1935 ; 14= 1936 ; 5= 1937?? ; 2= 1937? ; 1= 1937 ; 2= 1938? ; 2= 1938 ; 1= 1939?? ; 1= 1952?? ; 1= 1956? ; 1= 2013?

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):59


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