Antique radios, Old Time Radios

5857

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, 9 pin miniature (USA pico-9) B9A

Filament

Vf 6.3 Volts / If 0.45 Ampere / Indirect / Specified voltage AND current AC/DC

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.

Information source

- - Manufacturers Literature


5857: Radio-Electronics 06/1951 Daniel Consales	Just Qvigstad	5857: Manufacturer's Literature Emilio Ciardiello More ...

Collection of

Emilio Ciardiello (I)

5857

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