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3TF4

Information - Help 
ID = 23760
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Current Regulator, Iron in Hydrogen 
Identical to 3TF4

Base Noval, 9 pin miniature (USA pico-9) B9A
Filament
Description Control element from pin 2,3 to 7,8. 280 to 320mA at voltages from 4.3 to 8.3V. 
Information source Ballast Tube Handbook, The   
 
3tf4_amp.jpg
3TF4: Private collection
Emilio Ciardiello

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3TF4
Emilio Ciardiello

 

from Just Qvigstad

Usage in Models 1= 1960

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


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