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255

Information - Help 
ID = 13521
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Double Diode-Triode 
Identical to 255 = 55

Base 6-Pin-Base U6A, old, USA (Codex=Ka)
Was used by Radio/TV-reception etc.
Filament Vf 2.5 Volts / If 1 Ampere / Indirect
Description

This is an alternate code for the industry standard 55.

 
Information source Taschenbuch zum Röhren-Codex 1948/49   
 
461_7.png
255: Telefunken Werkstattbuch
Wolfgang Bauer

 

from Just Qvigstad

Usage in Models 2= 1933

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

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