Summary
A tetrode, manufactured by Philips, probably in Holland, introduced in 1932. It was used as a radio frequency amplifier.
It is a remote cut-off type and uses 2 Volts at 180 mA, with a directly heated cathode.
Tetrode (or screen grid tube) was used in high frequency amplification. Feed back from anode to control grid was virtually eliminated by uising a screen grid between them. Remote cut-off characteristic improves handling of large signals and facilitates the use of automatic volume control.
Physical Description
Four pin base with top cap.
More Information
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Collection Names
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Collecting Areas
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Acquisition Information
Donation from Mr Alexander H. Mackie, 10 Dec 1968
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Manufacturer
Philips (N.V. Philips Gloeilampenfabrieken), Holland, Netherlands, 1932
Probably made in Holland -
Inscriptions
PHILIPS B255 MINIWATT 23552
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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
130 mm (Length), 45 mm (Outside Diameter)
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References
[Book] Stewart, Finlayson (Fin). 1995. Illustrated History of Philips Radio Valves to 1935., 1995, 43 Pages
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