Summary
General purpose triode designed for operation from a 4 volt accumulator or dry batteries. A triode with low grid-plate capacitance and high plate resistance intended for use as a radio frequency amplifier or as a resistance-coupled audio amplifier. 4.0 volt directly heated cathode.
Physical Description
Conical glass bulb cut away to show the internal structure of a triode valve with a horizontal electrode structure. American style 4 pin (UX) base. Mounted on a 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, 27 Feb 1941
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Manufacturer
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Inscriptions
Bulb: A425/PHILIPS/Miniwatt/Sold for amateur use only Display block: TRIODE (General Purpose) A425/Philips. Made in Holland/(Brief description and 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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Overall Dimensions
97 mm (Length), 41 mm (Outside Diameter)
Not including display block
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Keywords