Power Module - Type 12HF

Power Module - Type 12HF
The G.R.A.S. Power Module Type 12HF is a power supply for single-channel, low-noise measurements using the matched, low-noise preamplifiers and high-sensitive microphones of a G.R.A.S. low-noise measuring system.
The Type 12HF provides:
  • polarisation voltage (200 V) for the condenser microphone
  • voltage supplies (±15 V) for powering the microphone preamplifier
  • a response setting of pressure or free field
When fitted with the above matched preamplifiers and microphones, the Type 12HF supports the specifications of a G.R.A.S. low-noise measuring system.
Specifications Type 12HF
Input channel:
7-pin LEMO EGA 1B connector
Outputs channel:
BNC socket
Output impedance:
30 Ohm
Polarisation voltage:
200 V
Power supply:
4 x LR14 (C) internal cells or an external supply of 6 - 20V DC
height: 132.6 mm (5¼")
width: 34.6 mm (1.3")
depth: 196.0 mm (7.7")
620 g (1.3 lbs)
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