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3A4

Information - Help 
ID = 4280
       
Country:  United States of America (USA)      Brand: Common type USA tube/semicond.
  Tube type:  Vacuum Pentode   Power/Output 
Identical to 3A4 = DL93 = 2P3 = CV2390 = CV807
Similar Tubes Normally replaceable-slightly different:
 CV2300

Base Miniatur-7-Pin-Base B7G, USA 1940 (Codex=Zzr)
Filament Vf 2.8 Volts / If 0.1 Ampere /
Tube prices 0 Tube prices (visible for members only)
Literature Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   

  3a4.png
  3A4: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
3a4_pic.jpg
3A4: o
Anonymous 15 Collector

 
Variants
 
501.png
3A4: Telefunken Werkstattbuch
Wolfgang Bauer

 
3a4_techdat01.png
3A4: Sylvania Technical Manual
Peter Hoddow


Usage in Models 1= 1937?? ; 1= 1943?? ; 1= 1944? ; 1= 1945 ; 1= 1946? ; 1= 1947? ; 1= 1947 ; 1= 1949?? ; 1= 1949 ; 1= 1951? ; 1= 1953? ; 1= 1953 ; 1= 1954?? ; 1= 1954? ; 1= 1955?? ; 1= 1955? ; 1= 1956 ; 3= 1960?? ; 1= 1960? ; 2= 1962 ; 1= 1964??
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):24

3A4*Box

Tóth Ferenc
Sandor Selyem-Tóth

Tóth Ferenc
Sandor Selyem-Tóth

Tóth Ferenc
Sandor Selyem-Tóth

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