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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 = T-38 = NU-238 = NU-38 = NY-68
Similar Tubes
Normally replaceable-slightly different:
  38038 ; 438
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 / Specified voltage AND current 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)
Information source Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   
  38.png
  38: Internet
Miguel Angel Trujillo-Rodriguez     More ...
 
38_rca_rmf.jpg
38: My Collection
Bruce Morgenstern
More ...
 
453_1.png
38: Telefunken Werkstattbuch
Wolfgang Bauer
More ...
 
38_techdat01.png
38: Sylvania Technical Manual
Peter Hoddow
More ...

from Just Qvigstad
Usage in Models 2= 1930?? ; 2= 1931?? ; 20= 1931? ; 34= 1931 ; 7= 1932?? ; 35= 1932? ; 58= 1932 ; 12= 1933?? ; 15= 1933? ; 39= 1933 ; 16= 1934?? ; 11= 1934? ; 50= 1934 ; 9= 1935?? ; 4= 1935? ; 32= 1935 ; 10= 1936?? ; 18= 1936? ; 18= 1936 ; 7= 1937?? ; 15= 1937? ; 7= 1937 ; 6= 1938? ; 7= 1938 ; 3= 1939?? ; 3= 1939 ; 3= 1940?? ; 1= 1940 ; 2= 1941? ; 1= 1942?? ; 1= 1946 ; 1= 2020
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):449
Collection of Christian Schaufelberger (CH)
Collection of Carlos A. Pieroni-García (ROU)
Collection of Valery Gromov (RUS)
Collection of David Pfister (CH)
Collection of a member from FIN
Collection of Justo Puertas-Paule (E)
Collection of Bruce Morgenstern (CDN)
Collection of David Erali (USA)
Collection of Patrice Follet (F)
Collection of Baptiste Hobbe (CDN)
Collection of Tor Steinnes (N)
Collection of Benedetto Pirani (I)
Collection of Robert Gillespie (USA)
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