Summary
Tetrode (usually called a screen-grid valve in its day) designed for use as a radio frequency (RF) amplifier in AC mains powered equipment. The use of a screen grid between the control grid and the plate reduced the grid-plate capacitance and permitted high gain at radio frequencies without stability problems. 2.5 volt indirectly heated cathode.
Physical Description
Conical glass bulb with top cap and American style 5 pin (UY) base. Mounted on display block with a sectioned example of a similar valve.
More Information
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Collection Names
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Collecting Areas
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Acquisition Information
Purchase
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Manufacturer
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Inscriptions
Bulb: Made In Holland/PHILIPS/PH/224 Display block: TETRODE (Screen Grid R.F.) 224/(List of makers)/(Brief description)
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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
124 mm (Length), 35 mm (Outside Diameter)
Not including display block.
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