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7H-4B

Information - Help 
ID = 19620
       
Country:
United States of America (USA)
Brand: Amperite Co., Inc.; Union City / West New York (NJ)
Tube type:  Current Regulator, Iron in Hydrogen   Power-supply 
Identical to 7H-4B

Base Octal (Int.Octal, IO) K8A, USA 1935
Filament
Dimensions (WHD)
incl. pins / tip
32 x 79 x mm / 1.26 x 3.11 x inch
Weight 30 g / 1.06 oz
Tube prices 1 Tube prices (visible for members only)
 
usa_7h4b_front_1.jpg
7H-4B: Martin Renoth
Anonymous 183 Collector

 
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7H-4B
Emilio Ciardiello

 


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