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A1820

Information - Help 
ID = 29394
       
Country:
Great Britain (UK)
Brand: Marconi-Osram - (Valves/Tubes); GB
Tube type:  Screen-grid Tetrode   Power/Output 
Identical to A1820 = CV409

Base Loctal-8, B8G (Sylvania, 1938) Top contact with a cap.
Filament Vf 6.3 Volts / If 0.95 Ampere / Indirect
Description Pa=10W. 10.5mA/V at 40mA Ia. 
Information source Universal Vade-Mecum, Electron Valves and Semiconductor Devices   group 216
 
a1820.jpg
A1820: RFJ
Roy Johnson

 

from Just Qvigstad


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