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39/44

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ID = 5766
       
Country:
United States of America (USA)
Brand:
Tube type:  Vacuum Pentode   RF/IF-Stage   Controlling (mu) 
Identical to 39/44 = VT-49 = 139 = ER44 = NU-239 = RYB239 = NU-39/44
Similar Tubes
Normally replaceable-slightly different:
  239 ; 39 ; 44
Other class quality (otherwise equal):
  CV1771
First Source (s)
Jun.1935 : 70 Years of Radiotubes and V.
Predecessor Tubes 44   39  

Base UY-Base, 5 Pins (USA, April 1927)
Was used by Radio/TV-reception etc.
Filament Vf 6.3 Volts / If 0.3 Ampere / Indirect / Parallel / series AC/DC
Tube prices 1 Tube prices (visible for members only)
Information source Essential Characteristics, GE 1973   
-- Original-techn. papers.   
 
39_44.jpg
39/44: scc
Christian Schaufelberger

 
453_2.png
39/44: Telefunken Werkstattbuch
Wolfgang Bauer

 
39_techdat01.png
39/44: Sylvania Technical Manual
Peter Hoddow


from Just Qvigstad

Usage in Models 1= 1934? ; 3= 1934 ; 1= 1935? ; 2= 1935 ; 1= 1936 ; 1= 1940?

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):9


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