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15

Information - Help 
ID = 3676
       
Country:
United States of America (USA)
Brand:
Developer: Sylvania (Hygrade, GTE, Nilco); Emporium (PA) 
Tube type:  Vacuum Pentode   RF/IF-Stage 
Identical to 15 = CV931 = NU-15
First year 1932 Radios von gestern, 2. Auflage
First Source (s)
1933 : -- Collector info (Sammler)
Base UY-Base, 5 Pins (USA, April 1927) (Codex=Hfo) Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 2 Volts / If 0.24 Ampere / Indirect / Battery =
Description

This tube was developed by Sylvania and first marketed in 1933. It was a sharp cutoff pentode u8sed in RF stages and as an autodyne converter in 2 volt battery radios. There were no direct equivalents. Sylvania marketed the tube and it was also sold by Raytheon and Philco and National Union, as the NU-15.

 
Dimensions (WHD)
incl. pins / tip		 x 116 x 42 mm / x 4.57 x 1.65 inch
Weight 38 g / 1.34 oz
Tube prices 1 Tube prices (visible for members only)
Information source Essential Characteristics, GE 1973   
Tube Lore (II)   p. 26
Taschenbuch zum Röhren-Codex 1948/49
valvula15.png
15: Internet
Miguel Angel Trujillo-Rodriguez
453.png 15: Telefunken Werkstattbuch
Wolfgang Bauer
More ...
Just Qvigstad 		15.png
15: Raytheon Databook 1937
Emilio Ciardiello
More ...
Usage in Models 2= 1932 ; 8= 1933 ; 20= 1934 ; 1= 1935?? ; 27= 1935 ; 2= 1936?? ; 1= 1936? ; 26= 1936 ; 1= 1937?? ; 4= 1937? ; 6= 1937 ; 18= 1938?? ; 6= 1938 ; 2= 1939?? ; 1= 1940?? ; 1= 1940? ; 1= 1940 ; 2= 1941? ; 1= 1945 ; 1= 9999
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):131

Collection of

John Koster (NL)
Bruce Morgenstern (CDN)
Peter den Boer (NL)
Rudolf Osterkamp (D)
 
philco_15.jpg

15
 
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