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P8250037a

A vacuum thermal timing switch with octal base, from the permanent exhibition of the Radio Amateur Association of Greece.

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2 comments

GrahamH said:

Interesting, I'd never heard of these.
11 years ago

SV1XV said:

It consists of a small bimetalic element (thermostat) in vacuum. These devices are still available on eBay.
11 years ago ( translate )