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6H8

Information - Help 
ID = 1990
       
Country:
France
Brand:
Tube type:  Double Diode-Pentode   RF/IF-Stage   Controlling (mu) 
Identical to 6H8 = 6H8MG
First year 1939 Tube leaflet collection E.Erb Analysis by original leaflets

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Octal)
Filament Vf 6.3 Volts / If 0.3 Ampere / Indirect / Parallel / series AC/DC
Description

According to the nomenclature, an octal tube 6H8 without a suffix as -G, -GT, etc. would presume a metal version of this tube, which apparently does not exist, but there are metal-glass (MG) tubes stamped as 6H8, see also under 6H8G and 6H8MG.

 
Text in other languages (may differ)
Tube prices 1 Tube prices (visible for members only)
Information source Taschenbuch zum Röhren-Codex 1948/49   
  6h8.png
  6H8: Schema tube 6H8
Stéphane Geslain
 
6h8~~3.jpg
6H8: J-L P
Jean-Luc Prevot

 
392_1.png
6H8: Telefunken Werkstattbuch
Wolfgang Bauer

 
6h8-doc.png
6H8: Radiotechnique Memento tubes 10/1963
Patrice Zeissloff


from Just Qvigstad

Usage in Models 1= 1938?? ; 4= 1939?? ; 1= 1939 ; 6= 1940?? ; 1= 1940? ; 6= 1940 ; 2= 1941?? ; 4= 1941 ; 2= 1942?? ; 2= 1942 ; 5= 1945?? ; 1= 1945? ; 6= 1945 ; 1= 1946?? ; 2= 1946? ; 26= 1946 ; 2= 1947?? ; 5= 1947? ; 31= 1947 ; 12= 1948?? ; 2= 1948? ; 26= 1948 ; 6= 1949? ; 17= 1949 ; 2= 1950?? ; 1= 1950? ; 6= 1950 ; 1= 1951? ; 6= 1951 ; 2= 1952 ; 1= 1953? ; 2= 1954

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):192


Forum contributions about this tube
6H8
Threads: 1 | Posts: 2
Hits: 311     Replies: 1
How to test Diods 6H8
Matthieu Testa
18.Apr.20
  1

Hi,

 

any infos about how to test the diods on 6H8 ?

 

Thx

Jacob Roschy
18.Apr.20
  2

Hello,

unfortunately no test values for signal diode tubes are published.

You can try this little test circuit as shown.

The 6.3 AC voltage source might be the heater voltage of the tube. Across the resistor R1 (100 kΩ), parallel with a capacitor 1 µF, you should find a DC voltage from about 6 to 10 V.

Just test on both diode units, compare it with other signal diode tubes, such as 6Q7, 6AV6, EBC41, etc.

good luck,

Best Regards,
Jacob

 
6H8
End of forum contributions about this tube

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