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6H8MG

Information - Help 
ID = 2979
       
Country:
France
Brand: Common type France tube/semicond.
Tube type:  Double Diode-Pentode   RF/IF-Stage   Controlling (mu) 
Identical to 6H8MG = 6H8
Similar Tubes
Other shape (e.g. bulb type):
  6H8G ; 6H8GT_MG
Multiple differences or of other kind:
  6H8GT ; EBF32
First Source (s)
Mar.1940 : L'Histoire Singulière du Tube Radio; G. Duperray 2009
30.Jan.1940 : Le Haut-Parleur No. 733
Predecessor Tubes 6B8   6B8G  
Successor Tubes 1948   EAF42   EBF80  
Base Octal (Int.Octal, IO) K8A, USA 1935 Top contact with a cap.
Filament Vf 6.3 Volts / If 0.3 Ampere / Indirect / Specified voltage AND current AC/DC
Description

Operating conditions I :
Va= 250 V, Vg2= 100V, Vg1= -2 V, Ia= 5.7 mA, Ig2= 1.8 mA, gm= 2.1 mA/V
Operating conditions II :
Va= 250 V, Vg2= 125V, Vg1= -2 V, Ia= 8.5 mA, Ig2= 2.6 mA, gm= 2.4 mA/V

 
Text in other languages (may differ)
Tube prices 1 Tube prices (visible for members only)
392_3.png 6H8MG: Telefunken Werkstattbuch
Wolfgang Bauer

Just Qvigstad 		6h8g_data_tungsram.png
6H8MG: Memento Tungsram Vol. 4
Jacob Roschy
Usage in Models 1= 1938?? ; 2= 1939?? ; 1= 1939 ; 2= 1940?? ; 4= 1940? ; 1= 1941?? ; 1= 1943? ; 2= 1945?? ; 4= 1945 ; 1= 1946?? ; 1= 1946? ; 3= 1946 ; 4= 1947?? ; 3= 1947? ; 6= 1947 ; 2= 1948?? ; 2= 1948? ; 3= 1948 ; 1= 1949? ; 2= 1949 ; 1= 1950?? ; 1= 1950? ; 1= 1950 ; 1= 1951?? ; 1= 9999
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):51

Collection of

Georges Werts (B)
Danko Tkalec (HR)
Jacob Roschy (D)
Peter Pfeiffer (D)
Bekir Yurdakul (F)
Joachim Röhling (D)
Peter Steffen (CH)
Jean-Jacques Pontigny (F)
Reinhard Riek (D)
Museum Roggenhofer (A)
 
6h8mg_a.jpg

6H8MG
 

Variants

By the designation 6H8MG the suffix "MG" indicates a glas tube encased in a metal envelope. Despite of this specified designation this tube lacks of this metal envelope. It's simply a glass tube with sprayed shield coating, as usual on side-contact-base- tubes.
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