radiomuseum.org

7A7

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ID = 2724
       
Country:
United States of America (USA)
Brand:
Tube type:  Vacuum Pentode   RF/IF-Stage   Controlling (mu) 
Identical to 7A7 = 7A7E = CV877
Similar Tubes
Other shape (e.g. bulb type):
  7A7LM
Heater different:
  14A7
Other base:
  6BD6 ; 6SK7 ; 6SK7GT
First Source (s)
09.Dec.1938 : Electron Tube Registration List
Predecessor Tubes 6K7G   6K7GT   6SK7   6SK7GT  
Successor Tubes 6BA6   6BJ6   6BD6  
Base Loctal-8, B8G (Sylvania, 1938) (Codex=W)
Filament Vf 6.3 Volts / If 0.3 Ampere / Indirect / Specified voltage AND current AC/DC
Tube prices 2 Tube prices (visible for members only)
Information source Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   
Tube Tester Data Avo CT160
7a7.png
7A7: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Anonymous 10 Collector
358.png 7A7: Telefunken Werkstattbuch
Wolfgang Bauer
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Just Qvigstad 		7a7_techdat01.png
7A7: Sylvania Technical Manual
Peter Hoddow
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Usage in Models 3= 1936 ; 1= 1938 ; 2= 1939?? ; 14= 1939 ; 5= 1940?? ; 2= 1940? ; 32= 1940 ; 3= 1941?? ; 2= 1941? ; 66= 1941 ; 4= 1942?? ; 14= 1942? ; 14= 1942 ; 2= 1943? ; 1= 1945?? ; 1= 1945? ; 1= 1945 ; 4= 1946?? ; 14= 1946? ; 28= 1946 ; 5= 1947?? ; 10= 1947? ; 56= 1947 ; 3= 1948?? ; 15= 1948? ; 76= 1948 ; 2= 1949?? ; 21= 1949? ; 26= 1949 ; 8= 1950?? ; 8= 1950? ; 2= 1950 ; 11= 1951?? ; 3= 1951? ; 1= 1951 ; 2= 1952?? ; 3= 1952? ; 3= 1952 ; 2= 1953 ; 1= 1958?? ; 2= 1959?
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):473

Collection of

Raynal Aufils (F)
Hermann Fleischanderl (A)
Peter Pfeiffer (D)
Bruno Candreia (CH)
Museum Roggenhofer (A)
Christian Schaufelberger (CH)
Collection of a member from FIN
Michael Gnaedig-Fischer (MEX)
Karl - Heinz Bossan (D)
Jozef Brughmans † (B)
George Papaiz (CDN)
David Erali (USA)
Georges Werts (B)
Tomasz Szczesniak (PL)
Aldo Patriarca (CH)
Tor Steinnes (N)
 
7a7_1~~1.jpg

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