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1T4

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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 (I)

Base Miniatur-7-Pin-Base B7G, USA 1940 (Codex=Zoo)
Filament Vf 1.4 Volts / If 0.05 Ampere / Direct / Battery =
Tube prices 13 Tube prices (visible for members only)
Information source 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 †
    More ...
594_1.png 1T4: Telefunken Werkstattbuch
Wolfgang Bauer

More ...

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

More ...
Usage in Models 1= 1940?? ; 2= 1940? ; 15= 1940 ; 7= 1941?? ; 9= 1941? ; 33= 1941 ; 3= 1942?? ; 10= 1942? ; 17= 1942 ; 2= 1943?? ; 4= 1943? ; 3= 1943 ; 1= 1944? ; 2= 1945?? ; 7= 1945 ; 2= 1946?? ; 8= 1946? ; 60= 1946 ; 2= 1947?? ; 15= 1947? ; 132= 1947 ; 10= 1948?? ; 17= 1948? ; 141= 1948 ; 9= 1949?? ; 12= 1949? ; 118= 1949 ; 47= 1950?? ; 17= 1950? ; 92= 1950 ; 13= 1951?? ; 22= 1951? ; 96= 1951 ; 30= 1952?? ; 18= 1952? ; 67= 1952 ; 12= 1953?? ; 29= 1953? ; 64= 1953 ; 7= 1954?? ; 32= 1954? ; 94= 1954 ; 40= 1955?? ; 28= 1955? ; 53= 1955 ; 8= 1956?? ; 20= 1956? ; 39= 1956 ; 1= 1957?? ; 8= 1957? ; 9= 1957 ; 4= 1958?? ; 2= 1958? ; 10= 1958 ; 3= 1959?? ; 1= 1959? ; 17= 1959 ; 4= 1960?? ; 1= 1960 ; 2= 1961? ; 1= 1961 ; 1= 1963? ; 1= 1965?? ; 1= 1969?? ; 3= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1539

Collection of

 
1t4_7.jpg

1T4
 

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