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ID = 31557
Great Britain (UK)
Brand: Ediswan, Siemens Edison Swan Electric Co.; London
Tube type:  Beam Power Tube   beam power   Power/Output 
Identical to S2P20 = CV4097
Predecessor Tubes VX6137  

Base Noval, 9 pin miniature (USA pico-9) B9A
Filament Vf 5 Volts / If 0.23 Ampere / Direct / Battery =
Description Centre tapped filament can operate at 2.5V 0.46A.
Pa <5W; Ruggedised tube for portable RF power amplification. 
Information source - - Manufacturers Literature   
S2P20: S.D.
Siegfried Droese


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