![](https://coimages.sciencemuseumgroup.org.uk/49/824/large_thumbnail_2009_5049.jpg)
Pressure Gradient Double (PGD) ribbon microphone No. 8
- Made:
- 1950-60
![Pressure Gradient Double (PGD) ribbon microphone No. 8, 1950-60.](https://coimages.sciencemuseumgroup.org.uk/536/394/small_thumbnail_2012_5118_0658.jpg)
![Pressure Gradient Double (PGD) ribbon microphone No. 8](https://coimages.sciencemuseumgroup.org.uk/528/361/small_thumbnail_smg00219838.jpg)
Pressure Gradient Double (PGD) ribbon microphone No. 8, 1950-60.
Very high quality BBC designed microphones, they 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 PGD 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:
- 2012-5118/658
- Materials:
- metal (unknown) and electronic components
- Measurements:
-
overall: 228 mm x 112 mm x 40 mm, 2.5 kg
- type:
- microphone