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ID = 10972
Great Britain (UK)
Brand: Ediswan, Siemens Edison Swan Electric Co.; London
Tube type:  Vacuum Pentode   RF/IF-Stage 
Identical to ATP7 = CV1368
Similar Tubes
Other characteristic (electr. data):

Base British-7-Pin, old (M7A) (Codex=Nr) Top contact with a cap
Was used by Military and/or Government
Filament Vf 6 Volts / If 0.2 Ampere / Direct
Description Selected V226 with minimum gm of 3 mA/V 
Literature Taschenbuch zum Röhren-Codex 1948/49   
- - Data from my own collection   
ATP7: O.R.
Ottmar Rollmann

ATP7: Manufacturer's Literature
Emilio Ciardiello

ATP7: Manufacturer's Literature
Emilio Ciardiello

Usage in Models 1= 1938 ; 1= 1940

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):2

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