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Please help me to identify this very old tube

Jacob Roschy Ernst Erb Martin Renz Bernhard Nagel 
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Forum » Valves / tubes - Semiconductors » Very rare valves or unknown (not in RMorg) » Please help me to identify this very old tube
Ottó Jancsek
Ottó Jancsek
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Pict.: 10
14.Apr.19 18:35
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I have the attached tube. It looks very old. There isn't any sign on it. It's a triode. The base looks UV. I think it's manufactured by Moorhead, but I'm not sure. Has anybody idea about it's manufacturer and/or type?

Best regards,





Hilmer Grunert
Hilmer Grunert
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19.Apr.19 01:31
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Hello Ottó

it seems to be an Electron Relay from de Forest or Marconi - Marconi has an rubber-stamped on base - like Your tube.

Foto is from : Saga of Vacuum Tube by Gerald F.J.Tyne

This article was edited 19.Apr.19 01:33 by Hilmer Grunert .