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1F7M

Information - Help 
ID = 41181
       
Country:
Canada
Brand: Rogers-Majestic, Standard Radio Manufacturing, Rogers Radio Tubes; Toronto
Tube type:  Double Diode-Pentode   Audio Frequency 
Identical to 1F7M = 1F7G

Base Octal (Int.Octal, IO) K8A, USA 1935
Filament Vf 2 Volts / If 0.06 Ampere / Direct / Battery =
Literature - - -   
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1f7mpix.jpg
1F7M: Rogers 1F7M Canada
John Albion

 
1f7m_so.png
1F7M: ARRL Handbook 1972
Michael Schlör

 

Usage in Models 12= 1937 ; 25= 1938

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):37


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