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2A12

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ID = 70501
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Current Regulator, Iron in Hydrogen   Power-supply 
Identical to 2A12

Base Octal (Int.Octal, IO) K8A, USA 1935
Was used by Technology / Measurement
Filament
Information source Ballast Tube Handbook, The   

2a12_sock.png 2A12: Ballast Tube, Jacoby, 1991
Anonymous 15 Collector


Just Qvigstad
Usage in Models 1= 1946 ; 1= 1955??

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):2

Collection of

 
2a12_1.jpg

2A12
 

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