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ID = 49882
Great Britain (UK)
Brand: Ferranti, GB
Tube type:  Vacuum Pentode   Power/Output 
Identical to PT4_Ferranti
Similar Tubes
Heater different:
First Source (s)
1934 : History of the British Radio Valve to 1940 p. 189

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 2 Ampere / Direct / Specified voltage AC/DC

Pa <8W, 2.5W output into 6500 ohms.

This differs from the MOV version in that it has a 2A heater current and very slightly different characteristic.

Information source Wireless World (The), London (WW, 79)   Data Nov 1934

PT4_Ferranti: Ferranti Valves, List Wb. 560
Achim Dassow

ferranti_pt4_socket.png PT4_Ferranti: Ferranti Valves List Wb. 560
Achim Dassow

Just Qvigstad
PT4_Ferranti: Ferranti Valves List Wb. 560
Achim Dassow

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