Summary
Two general purpose triode on a display block. This type of valve has a filament designed for economical operation from a 2 volt accumulator via a rheostat. Low current drain (150 mA) was emphasised by use of the then new trademark: "Miniwatt". 1.6 to 1.8 volt directly heated cathode.
One of the valves was sectioned by Museum curator J. C. Liddy.
Physical Description
One valve is intact; conical glass bulb. American style 4 short pin (UV) base with plated metal shell mounted on display block. The other valve is of the same type, but with most of its bulb removed to show a cylindrical triode structure mounted horizontally on a glass pinch. .
More Information
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Collection Names
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Collecting Areas
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Acquisition Information
Donation from J. G. Du Faur, 04 Oct 1948
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Manufacturer
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Inscriptions
Bulb: PHILIPS/Miniwatt/B II/Sold (illegible)/1,6 (illegible)/30-75V/MADE IN HOLLAND Remains of bulb: PHILIP/Miniwatt/B II/Sold for A(illegible) Base: X/P Display block: Description and brief data
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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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Part Dimensions
90 mm (Length), 46 mm (Outside Diameter)
Overall Dimensions of intact valve, excluding display block.
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Part Dimensions
77 mm (Length), 43 mm (Outside Diameter)
Overall Dimensions of sectioned valve, excluding display block.
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Keywords