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EM84 Info
Country:  Europe      Brand:  Common type Europe 
  Tube type:  Mag. bar tuning indicator   Indication 
Tube ID = 413
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Identical to EM84 = 6FG6 = EM85E
Similar Tubes EM87 (other characteristic (electr. data))   6e3p (can normally be replaced - small diff'ce)  
First Series   1957 Tube leaflet collection E.Erb Analysis by original leaflets
First Source (s) Sep.1957 : Funkschau (FS) 1957, Heft 18
Predecessor Tubes EM80   EM81   EM85  
Successor Tubes 1961 EM87  

Base Noval, B9A
Was used by Radio/TV-reception etc.
Filament Vf 6.3 Volts / If: 0.21 Ampere / -: Indirect / -: Parallel, (AC/DC) /
Description With a 250V supply and 470k ohm load, requires typically 0 to -22V grid voltage for full range of indication from 0 to 21mm bar length. It has a variable gain characteristic which improves the sensitivity to weak signals. 
Text in other languages (may differ)
Tube prices 14 Tube prices (visible for members only)
Literature - - Manufacturers Literature   

  em84_1.png
  Michael Schlör
Arpad Roth
em842.jpg
HS
Heinz Schmidt

 
no75.png
RTT 1974 (Franzis) 13. Auflage
Martin Renz

 
em84_kenn_im.png
Iven Müller
Iven Müller

Usage in Models (calculation each 25th of the month)   2= 1954 ; 3= 1955?? ; 1= 1955? ; 2= 1956?? ; 2= 1956? ; 4= 1956 ; 12= 1957?? ; 16= 1957? ; 98= 1957 ; 18= 1958?? ; 16= 1958? ; 281= 1958 ; 8= 1959?? ; 67= 1959? ; 461= 1959 ; 42= 1960?? ; 44= 1960? ; 413= 1960 ; 9= 1961?? ; 67= 1961? ; 411= 1961 ; 11= 1962?? ; 33= 1962? ; 337= 1962 ; 17= 1963?? ; 32= 1963? ; 289= 1963 ; 8= 1964?? ; 20= 1964? ; 156= 1964 ; 28= 1965?? ; 20= 1965? ; 135= 1965 ; 4= 1966?? ; 10= 1966? ; 84= 1966 ;
Number of Models with this tube   3317
Further Information for

EM84    

EM84 (EM84)  (05.05.2007) Vincent de Franco Clicks: 838     Replies: 0
Avec une tension de 250V et une charge de 470k ohm, 0 à -22V de tension sur la grille permet de faire varier la taille de la barre d'affichage de 0 à 21mm. Une caractéristique de gain variable permet en plus d'améliorer la sensibilité pour les signaux plus faibles.
 
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