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Mullard four-electrode ("space-charge grid") valve

Mullard four-electrode (space-charge grid') valve, type PM1DG

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Mullard four-electrode (space-charge grid') valve, type PM1DG
Science Museum Group
© The Board of Trustees of the Science Museum

Mullard four-electrode ("space-charge grid") valve, type PM1DG, c.1928

Details

Category:
Electronic Components
Object Number:
1985-39
type:
valve
credit:
Harley, S.G.

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