Antique radios, Old Time Radios

6H8MG

Country:	France		Brand:	Common production France
			Tube type:	Double Diode-Pentode RF/IF-Stage Controlling (mu)

Tube ID = 2979


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Identical to	6H8MG = 6H8
Similar Tubes	Other shape (e.g. bulb type): 6H8G Multiple differences or of other kind: 6H8GT
First Source (s)	Jul.1939 : Histoire de la lampe de radio
Predecessor Tubes	6B8 6B8G
Successor Tubes	1948 EAF42 EBF80

Base	Octal (Int.Octal, IO) K8A, USA 1935 Top contact with a cap
Was used by	Radio/TV-reception etc.
Filament	Vf 6.3 Volts / If: 0.3 Ampere / -: Indirect / -: Parallel / series 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	0 Tube prices (visible for members only)

collection JR
Jacob Roschy

Variants

Telefunken Werkstattbuch
Wolfgang Bauer

Usage in Models (calculation each 25th of the month)	1= 1935 ; 1= 1939?? ; 2= 1940? ; 4= 1945 ; 3= 1947?? ; 1= 1947 ; 3= 1948?? ; 1= 1949? ; 2= 1949 ; 1= 1950 ;
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe): 19

Variants
collection JR Jacob Roschy	6H8MG*glass 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. 15.Jul.2007 Jacob Roschy

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6H8MG

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6H8MG

Variants

6H8MG*glass

6H8MG