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M12

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ID = 72712
       
Country:
United States of America (USA)
Brand: Mastertone Radio Co.; Newark, NJ
Developer: Westinghouse El. & Mfg. Co. - see also Canadian W. 
Tube type:  Triode, vacuum   Universal 
Identical to M12
Similar Tubes
Normally replaceable-slightly different:
  WD12

Base UV-Base (4 Pins+Bayonet, USA 1914 WE)
Was used by Radio/TV-reception etc.
Filament Vf 1.5 Volts / If 0.25 Ampere / Direct / Battery =
Description

Mastertone Radio Co.

 
Dimensions (WHD)
incl. pins / tip
35 x 105 x 25 mm / 1.38 x 4.13 x 0.98 inch
Weight 52 g / 1.83 oz
Information source Radio World   Advert May 30th, 1925
-- Collector info (Sammler)   

uv_triode_tube~~36.png M12: Fin Stewart
Fin Stewart


Just Qvigstad
 
mastertone_m12_1.jpg

M12
 

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