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451_deForest

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ID = 60743
       
Country:
United States of America (USA)
Brand: DeForest-Tubes
Tube type:  Screen-grid Tetrode   RF/IF-Stage 
  Ca. 1925 up to 1945 rare.
Identical to 451_deForest = 35 = 35/51 = F235 = UY235 = ER235 = MY235 = PU035 = 51
Base UY-Base, 5 Pins (USA, April 1927)
Was used by Radio/TV-reception etc.
Filament Vf 2.5 Volts / If 1.75 Ampere / Indirect / Specified voltage AC/DC
Dimensions (WHD)
incl. pins / tip		 45 x 123 x mm / 1.77 x 4.84 x inch
Weight 50 g / 1.76 oz
Information source 70 Years of Radiotubes and V.   Page 166
551_so~~1.png 451_deForest: Fin Stewart
Fin Stewart

Just Qvigstad 		deforest_451_data.png
451_deForest: Electronics, May 1931
Achim Dassow
More ...
Literature "Electronics" Vol. 2 No. 5 | 1931-05
 
de_forest_451_tube.jpg

 
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