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4H4

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ID = 19117
       
 
   
Tube type:  Current Regulator, Iron in Hydrogen 
Identical to 4H4

Filament

6_4_21.png 4H4
Emilio Ciardiello

Usage in Models 2= 1954

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

Collection of

 
4h4pix.jpg

4H4
 

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