Summary
Tetrode (not a screen grid valve) - a space charge valve where the inner grid is connected to a positive bias to allow the valve to operate satisfactorily at a much lower anode voltage than a conventional triode (5 to 25 V).
3.4 - 3.8 V directly heated cathode.
Manufacturer: La Radiotechnique, France.
Physical Description
Tubular bulb mounted on 4 pin European style base (metal shell) and side terminal; 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 & Subsequent Transfer from National Museum of Victoria, 09 Jul 1948
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Manufacturer
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Inscriptions
Bulb: (RT logo)/MICRO BIGRIL Display block; (text)
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Brand Names
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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
97 mm (Height), 38 mm (Outside Diameter)
Dimensions of valve, excluding display block.
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References
[Book] Tyne, Gerald F. 1987. Saga of the Vacuum Tube., 1987, 401 - 402 Pages
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Keywords