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Old 7th February 2011, 05:21 PM   #1
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Join Date: Dec 2010
Default Unknown lamps need help

I have a couple of these lamps and I can not find the technical data.Label: F6028 C953 and E1651 OC and the tube is cooled with water (copper extension). I assume they are made in France and from 1945 until 1955 year.best regards was from Serbia.

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Old 17th February 2011, 05:53 PM   #2
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Join Date: Dec 2010
If anyone has an idea how to find some characteristics of these pipes, I suppose you are French, the copper radiator is maybe thiratron? These are major pipes in dimensions, is seen in the photo, which is a bit low.

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Old 17th February 2011, 06:25 PM   #3
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Join Date: May 2005
Location: California
The one on the far left looks like an 851 triode, obsolete by the mid 1930's, but an excellent audio triode.
You can get 100 watts SE with one of these in class A1.
Plate connection is on the top end.
The other end has three connections: The far 2 are for filament; 11 volts 15.5 amps. The middle connection is for the grid.
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