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3B28

Information - Help 
ID = 4298
       
Country:
Worldwide
Brand: Common type Worldwide tube/semicond.
Developer: Chatham Electronics; Newark, NJ 
Tube type:  Half-Wave Rectifier, gasfilled   Power-supply 
Identical to 3B28 = CV1835 = DCX4/1000
Similar Tubes
Normally replaceable-slightly different:
  VX550A
Multiple differences or of other kind:
  866A ; SS-3B28
First Source (s)
25.Jun.1945 : Electron Tube Registration List 415

Base UX-Base (4 Pins (2 thick, USA 1924, UX) Top contact with a cap.
Filament Vf 2.5 Volts / If 5 Ampere / Direct / Parallel, (AC/DC)
Description

Xenon rectifier; 10KV PIV, 250mA. Extended temperature replacement for 866A.
Known manufacturers: Chatham, Fivre, GE, Hytron, Marconi (I), Philips, RCA, UE, Westinghouse.

 
Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
51 x 154 x mm / 2.01 x 6.06 x inch
Weight 34 g / 1.20 oz
Tube prices 3 Tube prices (visible for members only)
Information source Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   
Tube Lore (I)
  3b25_app_2.png
  3B28: Manufacturer's Literature
Emilio Ciardiello
 
3b28_5.jpg
3B28: RK
Rudolf Kernchen

 
3b28_so.png
3B28: ARRL Handbook 1972
Michael Schlör

 
3b28_dat.png
3B28: RCA Transm. Tubes 1956
Otto Frosinn


from Just Qvigstad

Usage in Models 1= 1955? ; 1= 1958 ; 1= 1959? ; 1= 1959 ; 1= 1960

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):5


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