Summary
Although classified as a tetrode because it has two grids, this valve is not a screen grid type. It is a 'space-charge' valve where the inner grid is connected to a small positive voltage and the outer grid is used as the control grid. This allowed operation on very low plate voltages. 3.5 volt directly heated cathode.
As a detector this valve will work satisfactorily with a plate voltage between 2 and 4 volts, as an amplifier, it requires 4 to 10 volts.
Philips used Roman numbers in the type numbers of their first commercial receiving valves so this valve is in fact a D6.
Manufactured by: Philips, Holland
Physical Description
Spherical bulb with exhaust tip on top. 4 pin European style base with side terminal.
More Information
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Collection Names
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Collecting Areas
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Acquisition Information
Donation from Wireless Institute of Australia, Mr Max Howden, 28 Apr 1967
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Manufacturer
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Inscriptions
Bulb: PHILIPS/D VI/Sold for amateur use only/3.5V/MADE IN HOLLAND Base: IX/P
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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
109 mm (Length), 54 mm (Outside Diameter)
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References
[Book] Stewart, Finlayson (Fin). 1995. Illustrated History of Philips Radio Valves to 1935., 1995, 4 (illustration), 5, 26 Pages
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Keywords