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ID = 9358
Great Britain (UK)
Brand: Ferranti, GB
Tube type:  Pentagrid-Converter (Heptode)   Pentagrid (old)   Controlling (mu) 
Identical to VHT4
Similar Tubes
Heater different:
First Source (s)
11.Aug.1933 : Wireless World (The), London (WW, 79) p107

Base British-7-Pin, old (M7A) (Codex=Seo) Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 1 Ampere / Indirect / Parallel, (AC/DC)

This is the first British Pentagrid Frequency Changer.
Not P8A (Roehren-Codex) base but B7.

Information source Taschenbuch zum Röhren-Codex 1948/49   
Wireless World (The), London (WW, 79)   nov 1934
VHT4: Meine Sammlung
Rudolf Osterkamp


from Just Qvigstad

Usage in Models 3= 1933 ; 4= 1934 ; 1= 1935? ; 3= 1935 ; 6= 1936 ; 5= 1937

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):22

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