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5857

Information - Help 
ID = 58803
       
Country:
United States of America (USA)
Brand: National Union Radio Corp.; Orange (NJ)
Tube type:  Secondary Emission Pentode   VHF 
Identical to 5857
Similar Tubes
Multiple differences or of other kind:
  1630
First Source (s)
11.Sep.1950 : Electron Tube Registration List release 904

Base Noval, B9A
Filament Vf 6.3 Volts / If 0.45 Ampere / Indirect
Description

VHF secondary emission amplifier. Similar, as operating principle and structure of electrodes, to the RCA 1630. The cylindrical focusing electrode directs the two electron beams from opposite directions to a V-shaped dynode, with coated surfaces that release several electrons for each hit. Electrons emitted by the dynode surface are then attracted by the second anode.
Typical operation: 300V anode, 250V inner shield, 210V dynode voltage. Transconductance 20000 umhos.

 
Literature - - Manufacturers Literature   
 
5857_nu_1.jpg
5857: Private collection
Emilio Ciardiello

 
5857_sock.png
5857: Radio-Electronics 06/1951
Daniel Consales

 
5857_a1.png
5857: Manufacturer's Literature
Emilio Ciardiello



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