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Frenophone loudspeaker amplifier, 1922.

White, Ron

Frenophone loudspeaker amplifier, 1922.
4 0 c m
actual image size: 25cm x 32cm


Before modern moving-coil loudspeakers, most people listened to the radio on headphones. A speaker, if you had one, would probably have fixed coils driving an iron reed attached to a small diaphragm. However, this Frenophone loudspeaker incorporates a unique clockwork amplifier.

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© Science Museum / Science & Society Picture Library

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