Pressure Gradient Double (PGD) Ribbon Microphone No. 4

Made:
1950-60
maker:
British Broadcasting Corporation
Pressure Gradient Double (PGD) ribbon microphone No. 4

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Pressure Gradient Double (PGD) ribbon microphone No. 4
Science Museum Group
© The Board of Trustees of the Science Museum

Pressure Gradient Double (PGD) ribbon microphone No. 4 in fitted wooden box, 1950-60.

The PGD microphones were BBC Research Department prototypes. Never put into commercial production, the PGD had a double magnet, making it more sensitive than the PGS microphone (which had a single magnet). The BBC used at least one in Broadcasting House in the 1950s and 1960s. The PGS was later sold under licence by STC as the STC 4038.

Details

Category:
Television
Collection:
BBC Heritage Collection
Object Number:
2012-5118/650
Materials:
metal (unknown), electronic components and wood (unidentified)
Measurements:
overall: 87 mm x 357 mm x 170 mm, 4 kg
type:
microphone