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1A4E

Information - Help 
ID = 25570
       
Country:
Great Britain (UK)
Brand: Brimar (STC); Foots Cray
Tube type:  Screen-grid Tetrode   Controlling (mu) 
Identical to 1A4E
Similar Tubes
Normally replaceable-slightly different:
  1A4

Base UX-Base (4 Pins (2 thick, USA 1924, UX)
Filament Vf 2 Volts / If 0.06 Ampere
Information source Taschenbuch zum Röhren-Codex 1948/49   
 
1a4e_so.png
1A4E: ARRL Handbook 1972
Michael Schlör

 

from Just Qvigstad

Usage in Models 1= 1935 ; 1= 1936?

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

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