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UBL21

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ID = 287
       
Country:
Europe
Brand:
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Double Diode-Pentode   Power/Output 
Identical to UBL21 = UBL71
Similar Tubes
Normally replaceable-slightly different:
  UBL21(N)
Other base and data slightly different:
  UBL1 ; UBL3
Multiple differences or of other kind:
  CABL21
First year Feb.1941 Tube leaflet collection E.Erb Analysis by original leaflets (P11)
First Source (s)
May.1941 : Radio-Mentor # 5
Feb.1941 : Philips-Buch III
Predecessor Tubes CBL1   UBL1   CBL6   CABL21  
Base Loctal-8, B8G (Sylvania, 1938) (Codex=Wa)
Was used by Radio/TV-reception etc.
Filament Vf 55 Volts / If 0.1 Ampere / Indirect / Specified current AC/DC ~ = (Series working)
Tube prices 35 Tube prices (visible for members only)
Information source Philips Bulletin   Juli 1941
Taschenbuch zum Röhren-Codex 1948/49   
ubl21.png
UBL21: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
ubl21_sock.png UBL21: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector
More ...
Just Qvigstad 		ubl21_mullard_data_01.png
UBL21: Mullard - original papers
Wolfgang Romeyke
More ...
Usage in Models 8= 1941?? ; 6= 1941? ; 71= 1941 ; 3= 1942?? ; 3= 1942? ; 58= 1942 ; 3= 1943?? ; 16= 1943? ; 42= 1943 ; 5= 1944? ; 57= 1944 ; 5= 1945?? ; 10= 1945? ; 45= 1945 ; 5= 1946?? ; 12= 1946? ; 45= 1946 ; 7= 1947?? ; 12= 1947? ; 43= 1947 ; 14= 1948?? ; 22= 1948? ; 57= 1948 ; 7= 1949?? ; 15= 1949? ; 63= 1949 ; 11= 1950?? ; 8= 1950? ; 32= 1950 ; 2= 1951?? ; 7= 1951? ; 25= 1951 ; 3= 1952?? ; 5= 1952? ; 28= 1952 ; 4= 1953?? ; 7= 1953? ; 9= 1953 ; 4= 1954?? ; 3= 1954? ; 10= 1954 ; 6= 1955?? ; 5= 1955? ; 4= 1955 ; 1= 1956?? ; 1= 1956? ; 6= 1956 ; 5= 1957? ; 9= 1957 ; 2= 1958? ; 2= 1958 ; 1= 1959? ; 2= 1959 ; 1= 1960 ; 1= 1962? ; 1= 1970?? ; 2= 9999
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):841

Collection of

Lukas Radwallner (A)
Wolfgang Bauer (A)
Hermann Fleischanderl (A)
Thomas Loidl (A)
Michael Gnaedig-Fischer (MEX)
Bruno Candreia (CH)
Aldo Patriarca (CH)
Christian Schaufelberger (CH)
Gidi Verheijen (NL)
Bekir Yurdakul (F)
Patrice Zeissloff (F)
Jacky Parmentier (F)
Yaroslav Voronov (GB)
Jose Antonio Gonzalez-Ruiz (E)
Marcelino Iniesta Fernandez (E)
Justo Puertas-Paule (E)
Massimo Pedrina (I)
Antonio Bordini (I)
Georges Werts (B)
Hannu Alho (FIN)
Collection of a member from FIN
Timo Rantasaari (FIN)
Lars-G. Lundelin (FIN)
Walter Nigg (FL)
Sándor Selyem-Tóth (H)
Danko Tkalec (HR)
Tor Steinnes (N)
Jozef Solyga (PL)
Tomasz Szczesniak (PL)
Yury Savin (RUS)
Trev Levick (D)
Collection of a member from D
Hartmut Völler (D)
Martin Steyer (D)
Jacob Roschy (D)
Reinhard Riek (D)
Ottmar Rollmann (D)
Ulrich Fieseler (D)
Roland Biesler (D)
Jürgen Tiedmann (D)
Heribert Jung (D)
Karlheinz Fischer (D)
Werner Wussow (D)
Karl - Heinz Bossan (D)
Otto Frosinn (D)
Andreas Schulz (D)
Peter Pfeiffer (D)
 
ubl21_a.jpg

UBL21
 

Variants

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