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12F31

Information - Help 
ID = 3623
       
Country:
Czechoslovakia
Brand: Tesla; Praha, Bratislava etc.
Tube type:  Vacuum Pentode   RF/IF-Stage   Controlling (mu) 
Identical to 12F31 = HF93

Base Miniatur-7-Pin-Base B7G, USA 1940
Was used by Radio/TV-reception etc.
Filament Vf 12.6 Volts / If 0.15 Ampere / Indirect / Parallel / series AC/DC
Information source Röhren-Taschen-Tabelle, (Franzis RTT)   
 
12f31_hvr784.jpg
12F31: eigene Sammlung HV
Hartmut Völler

 
mi28_g_12.gif
12F31: RTT Schwandt
Günther Stabe † 19.8.20

 
12f31_spec.png
12F31: data-sheet
Anonymous 15 Collector


from Just Qvigstad

Usage in Models 1= 1956

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1


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