Details
These are superb quality (manufactured in the 1970's to military specification) low impedance very sensitive moving coil microphone capsules.
We do not recognise the manufacturer, but believe they were used in Racal equipment, the markings on the rear are 2390 TT 489.
Sealed units, we dessembled one to have a look inside, outstanding workmanship - obviously hand crafted, looks like they were created by a fine watch maker !
2 solder pads for connection, dimensions are 24mm x 16mm x 8mm deep.
We do not recognise the manufacturer, but believe they were used in Racal equipment, the markings on the rear are 2390 TT 489.
Sealed units, we dessembled one to have a look inside, outstanding workmanship - obviously hand crafted, looks like they were created by a fine watch maker !
2 solder pads for connection, dimensions are 24mm x 16mm x 8mm deep.