Philips capacitor microphone

maker:
Philips Electronics
Philips capacitor microphone

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Philips capacitor microphone
Science Museum Group
© The Board of Trustees of the Science Museum

Philips capacitor microphone (mini apple and biscuit style, valve). Single mic balance. Capsules rather variable and connector unreliable. Used with fixed equaliser. Has EF40 valve and 3-pin XLR connector - assumed that pin 1 = common, pin 2 = 6.3v DC (heater) and pin 3 = HT in and signal out (anode resistor in (missing) power supply). Outside of microphone is silver plated.

Philips omnidirectional valve capacitor microphone "much loved for orchestral balance".

Details

Category:
Television
Collection:
BBC Heritage Collection
Object Number:
2012-5118/407
Materials:
silver plated, metal (unknown) and electronic components
Measurements:
overall: 193 mm 40 mm, .22 kg
type:
microphone