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EBL21

Information - Help 
ID = 1875
       
Country:
Netherlands
Brand:
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Double Diode-Pentode   Power/Output 
Identical to EBL21 = PDD2 = EBL71
Similar Tubes
Normally replaceable-slightly different:
  DN143
Other base and data slightly different:
  6BY8G ; EABL21
First year Feb.1941 Tube leaflet collection E.Erb Philips Book III
First Source (s)
Jul.1941 : Philips Bulletin
Predecessor Tubes EBL1   ABL1   EABL21  
Successor Tubes 6BV7  

Base Loctal-8, B8G (Sylvania, 1938) (Codex=Wa)
Was used by Radio/TV-reception etc.
Filament Vf 6.3 Volts / If 0.8 Ampere / Indirect / Specified voltage AC/DC
Description

The EBL21 is an EBL1 transformed into an all- glas tube similar to the Sylvania-Loktal-tubes of 1938. It may used in simple superhets without audio pre stage where the output section is directly driven from the diode detector, or in sets where the audio pre-stage was combined with the IF stage or with separate tubes for IF+AF.J.R.8.Feb2003]

 
Text in other languages (may differ)
Tube prices 52 Tube prices (visible for members only)
Information source Taschenbuch zum Röhren-Codex 1948/49   

ebl21.png
EBL21: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
    More ...
lo11.png EBL21: RTT 1974 (Franzis) 13. Auflage
Martin Renz

More ...

Just Qvigstad
ebl21_mullard_data_01.png
EBL21: Mullard - original papers
Wolfgang Romeyke

More ...
Usage in Models 6= 1941?? ; 4= 1941? ; 56= 1941 ; 4= 1942?? ; 5= 1942? ; 74= 1942 ; 1= 1943?? ; 5= 1943? ; 57= 1943 ; 1= 1944?? ; 6= 1944? ; 75= 1944 ; 3= 1945?? ; 9= 1945? ; 28= 1945 ; 10= 1946?? ; 9= 1946? ; 89= 1946 ; 4= 1947?? ; 13= 1947? ; 117= 1947 ; 12= 1948?? ; 33= 1948? ; 137= 1948 ; 3= 1949?? ; 25= 1949? ; 111= 1949 ; 13= 1950?? ; 16= 1950? ; 67= 1950 ; 2= 1951?? ; 19= 1951? ; 30= 1951 ; 8= 1952?? ; 7= 1952? ; 19= 1952 ; 4= 1953? ; 6= 1953 ; 3= 1954?? ; 3= 1954? ; 7= 1954 ; 18= 1955?? ; 7= 1955? ; 15= 1955 ; 1= 1956?? ; 8= 1956? ; 13= 1956 ; 4= 1957?? ; 5= 1957? ; 13= 1957 ; 8= 1958?? ; 4= 1958? ; 10= 1958 ; 1= 1959?? ; 7= 1959 ; 4= 1960?? ; 1= 1960? ; 6= 1960 ; 1= 1961?? ; 10= 1961 ; 1= 1962?? ; 3= 1962 ; 4= 1963? ; 1= 1964 ; 1= 1965 ; 1= 1966?? ; 1= 1968?? ; 1= 1970?? ; 3= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1253

Collection of

 
ebl21_miniwatt_1.jpg

EBL21
 

Variants

Nur Siemens Austria fertigte diese Röhre mit dem Pumpstutzen an der Röhrenspitze.

Ab 1944 von Albis (CH) entwickelte Stahlröhre, deren Produktion 1945 wieder eingestellt wurde.
Von den Stahlausführungen der ECH21, EF22, EBL21 und AZ21 wurden insgesamt nur einige hundert Stück hergestellt.
Quelle: Willi, E., Schweizer Elektronenröhren, 2005


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