Summary
The pentode was superior to a triode as an output valve; it could deliver much more power to the load for the same plate supply and required considerably less drive. This type could produce over 5 watts when run from a 400 volt supply. 4.0 volt directly heated cathode.
The power pentode was developed by Bernard Tellegen of Philips in 1927. The first type made was the B443. The E443N was released in 1928.
Physical Description
Conical glass bulb with American style 5 pin (UY) base mounted on display block with a sectioned example of the same type of valve (ST 021555).
More Information
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Collection Names
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Acquisition Information
Purchase
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Manufacturer
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Inscriptions
On display block: Brief description of the valve
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Classification
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Type of item
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Overall Dimensions
120 mm (Length), 56 mm (Outside Diameter)
Display block not included.
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