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UCH21

Country:  Netherlands      Brand:  Philips; Eindhoven (tubes international!); Netherlands 
  Developer:  Philips; Eindhoven (tubes international!); Netherlands 
  Tube type:  Triode-Heptode   Universal   Controlling (mu) 
Tube ID = 285
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Identical to UCH21 = UCH71
Similar Tubes Other base:
 UCH4; UCH5
First year   Jan.1941 Tube leaflet collection E.Erb Analysis by original leaflets (P11)
First Source (s) Jan.1941 : Philips-Archiv
Predecessor Tubes UCH4   CCH2   CK3  
Successor Tubes 1948 UCH42   UCH81   UCH41  
Base Loctal-8, B8G (Sylvania, 1938) (Codex=Vao)
Filament Vf 20 Volts / If: 0.1 Ampere / -: Indirect / -: Series, AC/DC /
Tube prices 4 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   

  uch21.gif
  UCH21: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
uch21_5.jpg
UCH21: Own collection
Eduard Abfalterer
 
Variants
 
lo14_g~~1.gif
UCH21: RTT Schwandt
Günther Stabe
 
uch21_spec.png
UCH21: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector
Usage in Models   6= 1941?? ; 11= 1941? ; 48= 1941 ; 6= 1942?? ; 1= 1942? ; 43= 1942 ; 5= 1943? ; 30= 1943 ; 4= 1944? ; 46= 1944 ; 3= 1945?? ; 7= 1945? ; 27= 1945 ; 5= 1946?? ; 6= 1946? ; 36= 1946 ; 1= 1947?? ; 4= 1947? ; 35= 1947 ; 9= 1948?? ; 9= 1948? ; 60= 1948 ; 4= 1949?? ; 11= 1949? ; 71= 1949 ; 6= 1950?? ; 8= 1950? ; 34= 1950 ; 2= 1951?? ; 7= 1951? ; 25= 1951 ; 1= 1952?? ; 1= 1952? ; 24= 1952 ; 4= 1953?? ; 4= 1953? ; 9= 1953 ; 1= 1954?? ; 4= 1954 ; 4= 1955?? ; 2= 1955? ; 2= 1955 ; 2= 1956?? ; 4= 1956 ; 1= 1957? ; 7= 1957 ; 2= 1958? ; 1= 1958 ; 1= 1959 ; 1= 1960?? ; 1= 1962?
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):   646

  Variants


collection JR
Jacob Roschy
UCH21*tip

UCH21 w/ tip, made by Siemens and Triotron, both Austria

23.Feb.2009

 
   
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