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1S5T

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ID = 2814
       
Country:
Hungary
Brand: Tungsram; Budapest (see also British T.)
Tube type:  Diode-Pentode   Audio Frequency 
Identical to 1S5T
Similar Tubes
Heater different:
  1S5
Other base:
  1U5
First Source (s)
Apr.1949 : Funkschau 1949, Heft 9
Sep.1948 : Funk-Technik (FT) 1948 #18

Base Miniatur-7-Pin-Base B7G, USA 1940
Filament Vf 1.4 Volts / If 0.025 Ampere / Direct / Battery =
Description Miniature type used in light-weight, compact, portable, battery-operated receivers as combined detector and voltage amplifier. Filament 1.4 volts, 0.05 amperes. Same tube as 1S5 but built by Tungsram (T).

The 1U5 has the same electrical characteristics but it uses an improved structure which greatly reduces any tendency toward microphonic effects. In addition, the diode unit is effectively shielded from the pentode unit to prevent "play-through". 
Tube prices 21 Tube prices (visible for members only)
 
1s5t_2.jpg
1S5T: Tungsram
Georges Werts

 
530_2.png
1S5T: Telefunken Röhrenhandbuch
Wolfgang Bauer

 

Usage in Models 2= 1948 ; 1= 1949 ; 1= 1950?? ; 2= 1950? ; 9= 1950 ; 1= 1951?? ; 4= 1951 ; 3= 1952?? ; 1= 1952? ; 8= 1952 ; 1= 1953? ; 6= 1953 ; 2= 1954? ; 3= 1954 ; 1= 1955?? ; 2= 1955? ; 5= 1955 ; 2= 1956? ; 21= 1956 ; 2= 1957? ; 6= 1957 ; 1= 1958? ; 10= 1958 ; 8= 1959 ; 2= 1961 ; 1= 1962

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):105


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