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5TF4

Information - Help 
ID = 31108
       
Country:
United States of America (USA)
Brand: Amperite Co., Inc.; Union City / West New York (NJ)
Tube type:  Current Regulator, Iron in Hydrogen 
Identical to 5TF4

Base Noval, 9 pin miniature (USA pico-9) B9A
Filament
Description 550mA for 6.1 to 7.4V. Connections (2+3)to (7+8) 
Information source -- Collector info (Sammler)   
 
5tf4_amperite.jpg
5TF4: Private collection
Emilio Ciardiello

 
0_ball_53_3.png
5TF4
Emilio Ciardiello

 

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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