Summary
Triode heptode frequency changer. This, its side-contact equivalent ECH4 and its Loctal equivalent, ECH21 were unusual in that the triode grid was not internally connected to a hexode grid. This meant that the valve could be used for applications other than frequency changing.
6.3 V indirectly heated cathode, manufactured by Philips, Holland. In Australia this valve was usually called an ECH4G
Physical Description
Shouldered glass bulb on octal base with all pins present and top cap. Bulb has red sprayed coating as a screen.
More Information
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Collection Names
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Collecting Areas
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Acquisition Information
Unknown Acquisition Method from Unknown Source, 1981
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Manufacturer
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Inscriptions
Bulb: PHILIPS/"Miniwatt"/ECH34/MADE IN/HOLLAND Paper label on base: ECH34
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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
112 mm (Length), 34 mm (Outside Diameter)
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Keywords