Gallium phosphide crystal lamps (H4)

Gallium phosphide crystal lamps (H4)

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Gallium phosphide crystal lamps (H4), as illustrated in Doc. A3, designed for a film-marker application, part of early light emitting diodes, manufactured at Services Electronics Research Laboratory, England, 1960-1969. Many of the devices here are from a batch from 1962 rejected because of an error in the epoxy mixing, resulting in the encapsulation remaining sticky.

Details

Category:
Electronic Components
Object Number:
2012-137
type:
lamp
credit:
Gift of Prof. J. W. Allen