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ID = 5821
Developer: RCA (RCA Victor Co. Inc.); New York (NY) 
Tube type:  High Voltage Half-Wave Mercury-Vapor Rec   Power-supply 
Identical to 872A = VT-42A = CE-872A = RK872A = GL872A
Similar Tubes
Other shape (e.g. bulb type):
Normally replaceable-slightly different:
  319A ; 38172A ; 4064B ; CV642 ; VH7400
Other base:
  8008 ; 872G
Multiple differences or of other kind:
Predecessor Tubes 872  

Base Jumbo 4-pin bayonet (Codex=Bz) Top contact with a cap.
Was used by Transmittertube (Radio)
Filament Vf 5 Volts / If 7.5 Ampere / Direct / Parallel, (AC/DC)
Description Work started on the development of this tube at the RCA laboratories in the summer of 1932. The type number was assigned to it early in 1933 and it was announced in April, 1933. 10KV PIV, 1.25A average at 10V peak drop. Shielded element structure. Jumbo 4-pin base. 
Tube prices 4 Tube prices (visible for members only)
Information source Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature
  872A: Vacuum Tube Rectifier
Günter Kudicke
872A: L.N
Lars Nord

Emilio Ciardiello

872A: Handbook Raytheon amateur tubes
Miguel Angel Trujillo-Rodriguez

from Just Qvigstad

Usage in Models 1= 1965?

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):1

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