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38

Information - Help 
ID = 3111
       
Country:
United States of America (USA)
Brand:
Tube type:  Vacuum Pentode   Power/Output 
Identical to 38 = UY38A = ER238 = VT-38 = PH238 = 138A = UY38 = RYB238 = NU-238 = NU-38
Similar Tubes
Normally replaceable-slightly different:
  38038 ; 438 ; NY68
Other class quality (otherwise equal):
  CV712
Other characteristic (electr. data):
  NY-68A
Multiple differences or of other kind:
  6Z-P1 ; 6ZP1
First year 1930 -- Collector info (Sammler)
First Source (s)
Jun.1931 : -- Collector info (Sammler)
Successor Tubes 41  
Base UY-Base, 5 Pins (USA, April 1927) (Codex=Hfo) Top contact with a cap
Was used by Radio/TV-reception etc.
Filament Vf 6.3 Volts / If 0.3 Ampere / Indirect / Parallel / series AC/DC
Description

We believed that the tube is from 1931, but some models indicate 1930. Who knows more?

 
Tube prices 1 Tube prices (visible for members only)
Literature Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   
  38.png
  38: Internet
Miguel Angel Trujillo-Rodriguez
 
38_rca_rmf.jpg
38: My Collection
Bruce Morgenstern
 
453_1.png
38: Telefunken Werkstattbuch
Wolfgang Bauer
 
38_techdat01.png
38: Sylvania Technical Manual
Peter Hoddow
Usage in Models 2= 1930?? ; 2= 1931?? ; 20= 1931? ; 34= 1931 ; 7= 1932?? ; 35= 1932? ; 58= 1932 ; 12= 1933?? ; 15= 1933? ; 38= 1933 ; 16= 1934?? ; 9= 1934? ; 48= 1934 ; 8= 1935?? ; 4= 1935? ; 31= 1935 ; 10= 1936?? ; 18= 1936? ; 19= 1936 ; 7= 1937?? ; 15= 1937? ; 7= 1937 ; 6= 1938? ; 7= 1938 ; 4= 1939?? ; 3= 1939 ; 2= 1940?? ; 1= 1940 ; 2= 1941? ; 1= 1942?? ; 1= 1946
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):442
Collection of Tor Steinnes (N)
Collection of Patrice Follet (F)
Collection of David Erali (USA)
Collection of Benedetto Pirani (I)
Collection of Valery Gromov (RUS)
Collection of Christian Schaufelberger (CH)
Collection of a member from FIN
Collection of Bruce Morgenstern (CDN)
Collection of David Pfister (CH)
Collection of Justo Puertas-Paule (E)
Collection of Baptiste Hobbe (CDN)
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