Summary

Dual diodes of this type were primarily designed for use as low-level rectifiers in signal detection and instrumentation applications. The EB4 is equivalent to the octal based EB34 and is similar to the American 6H6. Independent 6.3 volt indirectly heated cathodes.
Possible manufacturer: Philips, Holland

Physical Description

Eight pin side contact base with conical red metallised bulb.

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