Type 26AR

Type 26AR
The G.R.A.S. ¼" Preamplifier Type 26AR is for acoustic measurements using condenser microphones.
It has a very low inherent-noise level, a wide dynamic range and a frequency response from below 2 Hz to above 200 kHz.
Like all G.R.A.S. microphone preamplifiers, it is based on a small ceramic thick-film substrate with a very high input impedance. The casing is made of stainless steel for maximum strength and durability. Its small dimensions ensure reliable operation under humid conditions owing to the heat generated by internal power dissipation.
Specifications Type 26AR
Specifications Type 26AR
Frequency range: 2 Hz - 200 kHz (±0.2 dB)
Input impedance: 0.4 pF, 20 G Ohm
Output impedance: 55 Ohm (typical)
Output connector: 7-pin LEMO male
Power supply, Single: 28 V, 0.7 mA to 120 V, 2.5 mA
and Dual: ±14 V, 0.7 mA to ±60 V, 2.5 mA
Noise, A-weighted and: ≤ 4 µV
Linear (20 Hz - 20 kHz): ≤ 10 µV rms 
Gain: –0.25 dB (typical)
Operating temperature: –30 °C to + 70 °C
Storage temperature: –40 °C to + 85 °C
Dimensions and weight (ex cable): diameter: 6.35 mm (¼")
length: 28.65 mm
weight: 4 g
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