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1A4T

Information - Help 
ID = 4090
       
Country:
United States of America (USA)
Brand:
Tube type:  Screen-grid Tetrode   Audio Frequency   Controlling (mu) 
Identical to 1A4T

Base UX-Base (4 Pins (2 thick, USA 1924, UX) (Codex=Bu) Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 2 Volts / If 0.06 Ampere / Direct
Dimensions (WHD)
incl. pins / tip
x 118 x 38 mm / x 4.65 x 1.50 inch
Weight 34 g / 1.20 oz
Information source Essential Characteristics, GE 1973   
Babani, International Radio Tube Encyclopaedia   p. 2 & 3
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
Taschenbuch zum Röhren-Codex 1948/49

440.png 1A4T: Telefunken Werkstattbuch
Wolfgang Bauer


Just Qvigstad
1a4t_daten.png
1A4T: Sylvania Rec. Tubes Manual 1944
Daniel Consales

More ...
Usage in Models 3= 1937 ; 1= 1939? ; 2= 1939 ; 1= 9999?

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):7

Collection of

Collection of a member from CH
 
usa_1a4t_sylvania_eb.jpg

1A4T
 

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