Base B8A

The B8A base is found on valves in the UK that date from the late 1940s and very early 1950s. The all glass B9A and B7G displaced the B8A base. We do not have exact dates as yet for when this base was current technology.

The pins are hard and inside the envelope they provide the supports for the electrodes. As the pins are equi-spaced around the circumference of the circle, a locating spigot is required to provide a positive registration with the socket.

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