Holtz 'restricted ray' vacuum tube

Holtz 'restricted ray' vacuum tube, simple pattern

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Holtz 'restricted ray' vacuum tube, simple pattern
Science Museum Group
© The Board of Trustees of the Science Museum

Holtz 'restricted ray' vacuum tube, simple pattern, probably made in Germany

Details

Category:
Electricity and Magnetism
Object Number:
1974-412/32
type:
vacuum tube
credit:
Leyton High School