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7Z4

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ID = 3264
       
Country:
United States of America (USA)
Brand:
Tube type:  Full-Wave Vacuum Rectifier 
Identical to 7Z4 = VT-181 = CV346 = CV1790
Similar Tubes
Normally replaceable-slightly different:
  EZ22
Heater different:
  28Z5
First Source (s)
30.Dec.1940 : Electron Tube Registration List
Predecessor Tubes 6W5G  
Successor Tubes 6BW4   28Z5  
Base Loctal-8, B8G (Sylvania, 1938) (Codex=W)
Filament Vf 6.3 Volts / If 0.9 Ampere / Indirect / Specified voltage AC/DC
Description <100mA mean current, 300mA peak. (Brimar Data Book 1947-48) 
Tube prices 2 Tube prices (visible for members only)
Information source Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   
7z4.png
7Z4: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Anonymous 10 Collector
7z4_1.png 7Z4: Manufacturer's Literature
Emilio Ciardiello
More ...
Just Qvigstad 		7z4_techdat01.png
7Z4: Sylvania Technical Manual
Peter Hoddow
More ...
Usage in Models 3= 1941?? ; 3= 1941 ; 3= 1942?? ; 2= 1942? ; 3= 1942 ; 1= 1943? ; 1= 1944 ; 2= 1945?? ; 2= 1946? ; 3= 1946 ; 8= 1947? ; 6= 1947 ; 3= 1948? ; 23= 1948 ; 9= 1949? ; 12= 1949 ; 2= 1950?? ; 9= 1950? ; 5= 1950 ; 1= 1951?? ; 4= 1951 ; 2= 1953?? ; 2= 1953? ; 20= 1953 ; 4= 1954?? ; 4= 1954? ; 19= 1955?? ; 6= 1960??
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):162

Collection of

Collection of a member from FIN
Tomasz Szczesniak (PL)
Geri Meier (CH)
Collection of a member from D
David Erali (USA)
Museum Roggenhofer (A)
Aldo Patriarca (CH)
Christian Schaufelberger (CH)
Valery Gromov (RUS)
Manfred Fries (CH)
 
7z4_1.jpg

7Z4
 
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