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ID = 82551
United States of America (USA)
Brand: Westinghouse El. & Mfg. Co. - see also Canadian W.
Tube type:  Triode, vacuum 
  <1925 very rare. ***
Identical to WR11
Similar Tubes
Differences not known by us:
  WD11 ; WR21

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Filament Vf 1 Volts / If 0.25 Ampere

Very similar to the WD11, but on a European B4 base. The elements are smaller than the WR21 but larger than the WD11. Also has an odd glass bead support structure at the top.  It has the solid brass pins to which the lead wires are soldered at the tops and the cork insulator / lead spacer below the stem press. 


b4_base_pins~~75.png WR11: Fin Stewart
Fin Stewart

Just Qvigstad


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