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1A7GT

Information - Help 
ID = 2618
       
Country:
United States of America (USA)
Brand:
Tube type:  Pentagrid-Converter (Heptode)   Pentagrid (old) 
Identical to 1A7GT = VT-147
Similar Tubes
Other shape (e.g. bulb type):
  1A7G
Other class quality (otherwise equal):
  CV1802
Other base:
  DK1
First Source (s)
26.Apr.1939 : Electron Tube Registration List

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Ut)
Filament Vf 1.4 Volts / If 0.05 Ampere / Direct / Battery =
Tube prices 4 Tube prices (visible for members only)
Literature Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   
  1a7_1.png
  1A7GT: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
 
1a7gtg_westinghouse_rmf.jpg
1A7GT: My Collection
Bruce Morgenstern

 
1a7gt_sock.png
1A7GT: Sylvana_Tube_Manual_1959
Egon Penker

 
1a7gt_techdat01.png
1A7GT: Sylvania Technical Manual
Peter Hoddow


Usage in Models 3= 1938 ; 4= 1939?? ; 30= 1939? ; 64= 1939 ; 31= 1940?? ; 74= 1940? ; 194= 1940 ; 32= 1941?? ; 92= 1941? ; 124= 1941 ; 20= 1942?? ; 48= 1942? ; 22= 1942 ; 3= 1945 ; 7= 1946?? ; 14= 1946? ; 81= 1946 ; 22= 1947?? ; 6= 1947? ; 56= 1947 ; 6= 1948?? ; 2= 1948? ; 15= 1948 ; 5= 1949?? ; 4= 1949? ; 5= 1949 ; 8= 1950?? ; 5= 1950? ; 2= 1951?? ; 2= 1951? ; 2= 1951 ; 6= 1952?? ; 1= 1952 ; 1= 1953?? ; 3= 1954?? ; 1= 1955?? ; 1= 1956 ; 1= 1958 ; 1= 9999?? ; 1= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):999


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