Mahogany coarse carbon granule microphone No. 3
- maker:
- Oliver Joseph Lodge
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Mahogany coarse carbon granule microphone No. 3, part of Oliver Lodge’s microphone amplifier or relay, 1898 (British patent 9712 of 1898), a precursor of the moving-coil loudspeaker
Details
- Category:
- Radio Communication
- Object Number:
- 1926-715
- Materials:
- mahogany (wood), brass (copper, zinc alloy) and metal (unknown)
- Measurements:
-
overall: 106 mm x 109 mm x 70 mm, .268 kg
- type:
- microphone
- credit:
- Sir Oliver Lodge.
