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1T4

Information - Help 
ID = 429
       
Country:  United States of America (USA)      Brand: Common type USA tube/semicond.
  Tube type:  Vacuum Pentode   RF/IF-Stage   Controlling (mu) 
Identical to 1T4 = DF91 = W17 = 1K2
Similar Tubes Normally replaceable-slightly different:
 CV1971
Other class quality (otherwise equal):
 CV785; VT-173
Heater different:
 1T4T; 399A; 399B
First year   1940 Tube leaflet collection E.Erb Analysis by original leaflets
First Source (s) 13.Nov.1939 : Tube Lore, Sibley, USA 1996

Base Miniatur-7-Pin-Base B7G, USA 1940 (Codex=Zoo)
Filament Vf 1.4 Volts / If 0.05 Ampere / Direct / Battery = /
Tube prices 6 Tube prices (visible for members only)
Literature Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   

  1t4.png
  1T4: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
1t4_7.jpg
1T4
Ulrich Fieseler

 
Variants
 
594_1.png
1T4: Telefunken Werkstattbuch
Wolfgang Bauer

 
1t4_1.png
1T4: Manufacturer's Literature
Emilio Ciardiello


Usage in Models 1= 1937? ; 1= 1940?? ; 2= 1940? ; 15= 1940 ; 7= 1941?? ; 9= 1941? ; 32= 1941 ; 3= 1942?? ; 9= 1942? ; 17= 1942 ; 2= 1943?? ; 3= 1943? ; 2= 1943 ; 1= 1944? ; 2= 1945?? ; 6= 1945 ; 2= 1946?? ; 7= 1946? ; 59= 1946 ; 2= 1947?? ; 10= 1947? ; 112= 1947 ; 3= 1948?? ; 15= 1948? ; 124= 1948 ; 7= 1949?? ; 6= 1949? ; 103= 1949 ; 38= 1950?? ; 8= 1950? ; 65= 1950 ; 14= 1951?? ; 5= 1951? ; 94= 1951 ; 21= 1952?? ; 9= 1952? ; 63= 1952 ; 7= 1953?? ; 13= 1953? ; 49= 1953 ; 7= 1954?? ; 17= 1954? ; 82= 1954 ; 25= 1955?? ; 11= 1955? ; 38= 1955 ; 3= 1956?? ; 17= 1956? ; 21= 1956 ; 5= 1957? ; 3= 1957 ; 4= 1958?? ; 3= 1959?? ; 1= 1959? ; 15= 1959 ; 4= 1960?? ; 1= 1961 ; 1= 1962?? ; 1= 1965?? ; 1= 1969?? ; 2= 9999
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1210

1T4*Box

B.Pötzsch
Bernd Pötzsch

Sammlung
Karlheinz Fischer

mp

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