Summary
WT50 diode, an external grid triode. The "grid" or control electrode is missing from this sample. If it were present it would consist of a few turns of wire hound in the waist of the bulb.
Manufacturer: Welsh Electric Lamp Corp. 72 Boylan St., later 38-40 Clinton St. Newark NJ, USA.
Manufactured for: Radio Research Guild, 9-15 Clinton St. Newark NJ, USA.
Physical Description
Cylindrical bulb with top exhaust tip and slight waist near the top, fitted to a 2 pin bayonet base (brass shell), with a 3rd wire coming between brass shell and bulb, mounted on display block.
More Information
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Collection Names
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Collecting Areas
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Acquisition Information
Donation from S. M. Ballantyne, 31 Jan 1934
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Manufacturer
Welsh Electric Lamp Co, Newark, Essex County, New Jersey, United States of America, 1923
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Manufactured For
Radio Research Guild, Clinton St,, New Jersey, United States of America, 1923
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Inscriptions
Base: WELSH W.T.50 PAT. PEND.(faded)
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Classification
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Category
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Discipline
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Type of item
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Overall Dimensions
58 mm (Height), 16 mm (Outside Diameter)
Dimensions of valve, excluding display block.
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References
See link for a picture of a complete example. 4 to 6 volt directly heated cathode: [Link 1] (accessed 2 Feb 2011)
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Keywords
