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2A12

Information - Help 
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_1.jpg
2A12: Collezione
Ciro Guidi

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

 

from Just Qvigstad

Usage in Models 1= 1951??

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


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