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Tunograph

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ID = 41510
       
Country:
Great Britain (UK)
Brand: Standard Telephones and Cables Ltd. (STC); London, Foots Cray
Tube type:  Mag. Eye, 1 shadow angle   Indication 
Identical to Tunograph
First Source (s)
06.Oct.1933 : Wireless World (The), London (WW, 79) p290

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928
Filament Vf 0.5 Volts / If 0.85 Ampere / Direct
Description Heater rated at 0,85 to 1,0A at 0,5 to 0,6V. Normally supplied from 4V via a 4 ohm resistor.

HT minimum of 180V.
Probably the first cathode ray "magic eye" tube. The design by STC was based on an STC cathode ray tube.

Two methods of use were suggested:
a) HF/IF anode current fed via suiable network.
b) HF/IF signal applied directly to the grid to produce a straight line with a length in proportion to signal strenth. 

Information source - - Manufacturers Literature   

uk_brimar_tunograph_cct.png
Tunograph: Internet
Roy Johnson

tunograph_brimar_radio_valves_1936_p1_pin.png Tunograph: Brimar Radio Valves 1936
Adrian Riesen


Just Qvigstad
tunograph_page46_1.png
Tunograph: Data Sheet
Ernst Erb

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Tunograph
 

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