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ID = 68443
United States of America (USA)
Brand: WLS (tubes), World's Largest Store - see also Sears, Roebuck & Co; Chicago, IL
Developer: Raytheon Mfg. Co.; Cambridge, MA 
Tube type:  Gas Rectifier   Power-supply 
  Ca. 1925 up to 1945 rare.
Identical to 57T4635 = BH

Base UX-Base (4 Pins (2 thick, USA 1924, UX)
Was used by Radio/TV-reception etc.

Pages 762 and 763 of the Fall 1929 issue of the Sears Roebuck catalog listed radio tubes with a totally new type number, and the 57T4635 is the Raytheon BH battery eliminator rectifier tube, which operates at 125mA output. The catalog pages mainly refer to Silvertone receiving tubes but also to this tube and three "Tungar" rectifier tubes.

Dimensions (WHD)
incl. pins / tip
x 108 x 45 mm / x 4.25 x 1.77 inch
Information source Sears, Roebuck Catalogs (Silvertone)   Pages 762 and 763, Fall 1929 issue

raytheon_b_ba_bh~~2.png 57T4635: Fin Stewart
Fin Stewart

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