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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)
Information source 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 †
1a7gt_sock.png 1A7GT: Sylvana_Tube_Manual_1959
Egon Penker
More ...
Just Qvigstad 		1a7gt_techdat01.png
1A7GT: Sylvania Technical Manual
Peter Hoddow
More ...
Usage in Models 3= 1938 ; 4= 1939?? ; 33= 1939? ; 65= 1939 ; 29= 1940?? ; 83= 1940? ; 200= 1940 ; 27= 1941?? ; 95= 1941? ; 128= 1941 ; 18= 1942?? ; 48= 1942? ; 22= 1942 ; 1= 1943?? ; 1= 1945? ; 4= 1945 ; 6= 1946?? ; 15= 1946? ; 84= 1946 ; 22= 1947?? ; 6= 1947? ; 56= 1947 ; 6= 1948?? ; 5= 1948? ; 14= 1948 ; 5= 1949?? ; 4= 1949? ; 5= 1949 ; 8= 1950?? ; 5= 1950? ; 2= 1951?? ; 3= 1951? ; 1= 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):1024

Collection of

Emilio Focosi (I)
Patrice Follet (F)
Keith Ellison (AUS)
Ernst Rykkje (N)
Christian Schaufelberger (CH)
George Papaiz (CDN)
Danko Tkalec (HR)
Marcelino Iniesta Fernandez (E)
David Erali (USA)
Shaun Merrigan (CDN)
Wolfgang Bauer (A)
Michael Gnaedig-Fischer (MEX)
Valery Gromov (RUS)
Peter Pfeiffer (D)
Collection of a member from FIN
Frank Cuffe (IRL)
Hannu Alho (FIN)
Egon Penker (A)
Aldo Patriarca (CH)
Tomasz Szczesniak (PL)
Bruce Morgenstern (CDN)
Uwe Rössler (D)
Oskar Elm (D)
 
1a7gtg_westinghouse_rmf.jpg

1A7GT
 
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