Summary
Tetrode used as an RF amplifier and anode-bend detector in early AC mains powered radios. Also occasionally used as an oscillator making use of the negative plate resistance obtained by operating with the plate voltage less than the screen voltage, sometimes called the 'negatron' circuit.
The brand name 'Ken-Rad' was used during the war years on valves manufactured by AWV but marketed by Tecnico Ltd. (formerly E.T.C. Industries Pty. Ltd.). Until late 1941 E.T.C. Industries were importing Ken-Rad valves from the United States but after that they were selling the locally made ones branded Ken-Rad.
2.5 V indirectly heated cathode. Manufacturer: AWV, Sydney Australia
Physical Description
Base type: American style No. of pins in base: 5 Bulb shape: shouldered Bulb material: glass Top cap
More Information
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Collection Names
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Collecting Areas
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Acquisition Information
Donation from I. C. Paterson, 15 Dec 1980
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Manufacturer
Australian Wireless Valve Co (AWV Co), Sydney, New South Wales, Australia, 1939-1945
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Inscriptions
Bulb: 24A Base: Ken-Rad / MADE IN AUSTRALIA / 1(over)4
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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
127 mm (Length), 44 mm (Outside Diameter)
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Keywords