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EM71

Information - Help 
ID = 372
       
Country:
Germany
Brand: Lorenz; Berlin, Zuffenhausen u.a.
Developer: Lorenz; Berlin, Zuffenhausen u.a. 
Tube type:  Mag. Fan, 1 shadow angle   Indication 
Identical to EM71
Similar Tubes
Other class quality (otherwise equal):
  EM71a
Heater different:
  12M71 ; HM71
Multiple differences or of other kind:
  EM72
First year 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 Vf 6.3 Volts / If 0.3 Ampere / Indirect / Parallel / series AC/DC /
Description

With Supply 250V and 1M ohm anode load, requires 0 to -20V for full range indication.

 
Tube prices 25 Tube prices (visible for members only)

  em71_1.png
  EM71: Courtesy Bureau Belper (De Muiderkring, Bussum)
Michael Schlör
 
em71_lorenz~~1.jpg
EM71: My tubes
Anonymous 413 Collector

 
lo21.png
EM71: RTT 1974 (Franzis) 13. Auflage
Martin Renz

 
em71_techdat01.png
EM71: SEL Handbuch 1964
Peter Hoddow


Usage in Models 2= 1950?? ; 2= 1950? ; 19= 1950 ; 1= 1951?? ; 1= 1951? ; 27= 1951 ; 1= 1952?? ; 2= 1952? ; 29= 1952 ; 4= 1953?? ; 10= 1953? ; 30= 1953 ; 2= 1954?? ; 18= 1954 ; 3= 1955?? ; 2= 1955? ; 19= 1955 ; 1= 1956?? ; 4= 1956? ; 23= 1956 ; 1= 1957? ; 24= 1957 ; 1= 1958?? ; 3= 1958? ; 8= 1958 ; 7= 1959? ; 2= 1959 ; 2= 1960? ; 7= 1960 ; 1= 1961 ; 1= 1962? ; 1= 1965?? ; 1= 1967

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):259


Forum contributions about this tube
EM71
Threads: 1 | Posts: 3
Hits: 2484     Replies: 2
EM71
Robert Sarbell
23.Aug.05
  1 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
Hans M. Knoll
23.Aug.05
  2   Hallo Mr. Sarbell.

Ich habe mir einmal das HICHOK 752A bei "Jogi" angesehen. Soweit ich sehen kann,

ist der Unterschied zu den Typen TV7..../U nicht sehr gross oder sie sind identisch.

Das TB 11- 6625-274-12/1 c3 vom Jan. 1963   zu den TV7, hat einen Anhang "EUROPIAN TUBE TYPE"  Dort gibt es Angaben zur EM71/72 .

Fuer die TV7..../U  lautet das:

Fil. 6,3V

JR6-2570

BIAS = 100

Range: A

SHUNT= 100

Press. 3

BIAS Control: controls Eye :   open>> close.

Ich denke das gilt auch fuer das 752A

Gruesse von Hans M. Knoll

Sorry only in german!

Robert Sarbell
23.Aug.05
  3 Guter Nachmittag Herr Knoll,

Danke soviel. Die Hickok fremden Schlaucharten Ergänzungstestdaten gibt keine Informationen an allen für das EM71.

Mit Ihren Informationen benutzte ich die folgenden Einstellungen:

HEIZFADEN: 6.3V

ELEMENT-VORWAHL: 8160-2570

VORSPANNUNG: 100

SHUNT: 100

MULT: x1

PRESSE: S5 Umdrehung des schrägen

Schalters zeigt Muster an, wie im Magische Augen gezeigt:
Schattenbilder - Thread 36832 vom KoBi

mfG,
Robert
NB: Tube appears not as NEW, but responds well to bias changes and phosphor is not so bad!! I agree also that the Hickok 752A testers are quite expensive, but tests the dual-tubes quickly when time meant money for the repair man - 10 years ago I paid only $40.00 for tester and 700 tubes. . . . . .

 
EM71
End of forum contributions about this tube

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