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ID = 7457
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  High-vacuum Rectifier   Power-supply 
Identical to 371B
Similar Tubes
Other class quality (otherwise equal):

Base (Codex=Bz) Top contact with a cap
Was used by Industrial
Filament Vf 5 Volts / If 10.2 Ampere / Direct

25KV PIV, 250mA. Ruggedized version of 371A.
Electronic Enterprises, National Union, United Electronics, Western Electric some of the known manufacturers.
Jumbo 4-pin base.

Tube prices 1 Tube prices (visible for members only)
Information source Tube Lore (I)   
371B: R.O.
Rudolf Osterkamp

371B: orig. doc.
Wolfgang Holtmann

371B: Central Electronic Tube Handbook
Aldo Patriarca

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