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UY21

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ID = 629
       
Country:
Netherlands
Brand:
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Half-Wave Vacuum Rectifier   Power-supply 
Identical to UY21
Similar Tubes
Other base:
  UY11 ; UY1N ; UY3
First year Feb.1941 Tube leaflet collection E.Erb Analysis by original leaflets (P11)
First Source (s)
May.1941 : Radio-Mentor 1941 # 5
1941 : Philips-Buch III = 1941
Predecessor Tubes CY1   UY1   UY1N   CY21  
Successor Tubes UY41  
Base Loctal-8, B8G (Sylvania, 1938) (Codex=Wa)
Was used by Radio/TV-reception etc.
Filament Vf 50 Volts / If 0.1 Ampere / Indirect / Specified current AC/DC ~ = (Series working)
Tube prices 5 Tube prices (visible for members only)
Information source Philips Bulletin   Juli 1941
Taschenbuch zum Röhren-Codex 1948/49   
uy21.png
UY21: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
uy21_so.png UY21: rtt
Anonymous 10 Collector

Just Qvigstad 		uy21dat.png
UY21: Miniwatt Monatshefte
Anonymous 225 Collector
More ...
Usage in Models 3= 1941?? ; 3= 1941? ; 61= 1941 ; 2= 1942?? ; 27= 1942 ; 7= 1943? ; 16= 1943 ; 16= 1944 ; 1= 1945?? ; 5= 1945? ; 9= 1945 ; 2= 1946?? ; 1= 1946? ; 8= 1946 ; 2= 1947? ; 12= 1947 ; 1= 1948?? ; 1= 1948? ; 10= 1948 ; 14= 1949 ; 1= 1950?? ; 1= 1950? ; 2= 1950 ; 3= 1951 ; 1= 1952 ; 2= 1953 ; 1= 1954?? ; 1= 1955?? ; 1= 1955? ; 1= 1956?? ; 1= 1958?
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):216

Collection of

Jörg Kulbe (D)
Trev Levick (D)
Tomasz Szczesniak (PL)
Peter Pfeiffer (D)
Hartmut Völler (D)
Wolfgang Bauer (A)
Etienne Flemal (B)
Collection of a member from D
Thomas Loidl (A)
Christian Schaufelberger (CH)
Danko Tkalec (HR)
Yury Savin (RUS)
Karl - Heinz Bossan (D)
Jürgen Küting (D)
Albrecht Schwaderer (D)
Tor Steinnes (N)
Georges Werts (B)
Andreas Schulz (D)
Marcelino Iniesta Fernandez (E)
Collection of a member from FIN
Jürgen Tiedmann (D)
Thomas Lüthe (D)
Sepp Juster (A)
Timo Rantasaari (FIN)
Collection of a member from SK
 
uy21_a.jpg

UY21
 

Variants

UCH21 w/ tip, only made by Siemens Austria
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