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MT3F

Information - Help 
ID = 19706
       
Country:
Great Britain (UK)
Brand: Ediswan, Siemens Edison Swan Electric Co.; London
Developer: Marconi's Wireless Telegraph Co. Ltd. 
Tube type:  Transmitting Triode, air cooled 
Identical to MT3F
First year 1919 ?? British Radio Valves - The Vintage Years, Thrower page 129 - but before = Ediswan

Base TRANSMITTER-Base in gneral
Filament Direct
Description Ediswan is probably producing until 1919 when production went to Osram. 
Text in other languages (may differ)
Literature - - -   
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mt3f.jpg
MT3F: collection personnelle
Marc Couque

 

Usage in Models 1= 1927?

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1


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