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EM71 Info
Country:  Germany      Brand:  Lorenz; Berlin, Zuffenhausen u.a. 
  Developer:  Lorenz; Berlin, Zuffenhausen u.a. 
  Tube type:  Mag. Fan, 1 shadow angle 
Tube ID = 372
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Identical to EM71
Similar Tubes EM71a (other class quality (otherw. equal))   HM71 (Heater different)  
First Series   1949 Tube leaflet collection E.Erb Analysis by original leaflets
First Source (s) Sep.1950 : Funk-Technik (FT) # 18
Predecessor Tubes EM4   EM11  
Successor Tubes EM80   EM71a  

Base Loctal-8, B8G (Sylvania, 1938)
Was used by Radio/TV-reception etc.
Filament -: Indirect / -: Parallel / series AC/DC / If: 0.3 Ampere / Vf 6.3 Volts /
Description With Supply 250V and 1M ohm anode load, requires 0 to -20V for full range indication. 
Tube prices 9 Tube prices (visible for members only)

  em71_1.png
  Courtesy Bureau Belper (De Muiderkring, Bussum)
Michael Schlör
em71.jpg
Courtesy Thomas Rapp, roehren-museum.de
Olaf Toenne

 
lo21.png
RTT 1974 (Franzis) 13. Auflage
Martin Renz

 
em71_techdat01.png
SEL Handbuch 1964
Peter Hoddow

Usage in Models   1= 1950?? ; 2= 1950? ; 16= 1950 ; 1= 1951? ; 25= 1951 ; 1= 1952?? ; 1= 1952? ; 26= 1952 ; 5= 1953?? ; 6= 1953? ; 26= 1953 ; 14= 1954 ; 2= 1955?? ; 1= 1955? ; 18= 1955 ; 1= 1956? ; 22= 1956 ; 18= 1957 ; 1= 1958?? ; 6= 1958 ; 1= 1959 ; 2= 1960 ; 1= 1961 ; 1= 1962? ;
Number of Models with this tube   198
Further Information for

EM71    

EM71  (23.08.2005) Robert Sarbell Clicks: 713     Replies: 2
Hello Ernest, or JR, or any member who can provide some definitive guidance for the proper "test settings" for my Hickok 752A to test the Lorenz EM71 that I received today. I do have the respective Funke W19 test card, dated 7.57 (page 646) . . . .my main concerns are the control electrode designation; and the bias and shunt settings. Respectfully, Robert
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