ETMC Technologies :: G.R.A.S. Sound & Vibration :: 1/4" Preamplifiers Types 26AA, 26AB, 26AC, 26AL, 26AN, 26HG, and 26TC

<H1>No Frames? No Problem!</H1> <p><br>Go to G.R.A.S. Sound & Vibration web site with <A HREF="http://www.gras.dk/00012/00045/00046/00047/">no-frames</A>.</p> <p>Type 26AA, for Intensity Measurements <p>Preamplifier with 30 cm lightweight cable terminating in a 4-pin LEMO 0B connector. Intended for use with G.R.A.S. Sound Intensity Probes, in which case they are also available in matched pairs under the name: Type 26AA Set. <p><p>Type 26AC, General-purpose <p>General-purpose preamplifier with an integrated 3-m lightweight cable terminating in a 7-pin LEMO connector. A ¼" to ½" adapter, GR0010, is included, so that it can also be used with G.R.A.S. ½" microphones. <p><p>Click to enlargeType 26AL, Built-in SysCheck <p>General-purpose preamplifier with an integrated 3 metre lightweight cable terminating in a 7-pin LEMO connector. Includes built-in SysCheck facility for enabling easy system checks to be made. A ¼" to ½" adapter, GR0010, is included, so that it can also be used with G.R.A.S. ½" microphones. <p><p>Click to enlargeType 26HG, Infra-sound <p>Similar to Type 26AC but with 40 GOhm input impedance to enable low-level noise measurements at very low frequencies (infra-sound). Used in the Low-noise level microphone system Type 40HT <p><p>Click to enlargeType 26AB, General-purpose <p>General-purpose preamplifier with an integrated 7-pin LEMO connector. A ¼" to ½" adapter, AF0008, is included, so that it can also be used with G.R.AS. ½" microphones. Cable not included. <p><p>Click to enlargeType 26AN, Insert-voltage <p>Preamplifier with an integrated 7-pin LEMO connector. Configured to permit use of the insert-voltage technique for determining the open-circuit sensitivity of a microphone. A ¼" to ½" adapter, GR0010, is included, so that it can also be used with G.R.A.S. ½" microphones. Cable not included. <p><p>Click to enlargeType 26TC, built-in TEDS <p>Preamplifier with an integrated 3 metre lightweight cable terminating in a 7-pin LEMO connector. Includes built-in TEDS* chip which enables it to be programmed with calibration data as a complete unit together with a microphone. A ¼" to ½" adapter, GR0010, is included, so that it can also be used with G.R.A.S. ½" microphones. <p>* Transducer Electronic Data Sheet as proposed by IEEE-P1451.4 <p>** Constant-Current Power Supply <p>Specifications Types 26A+ Series, 26TC and 26HG <p>Frequency range: 2 Hz - 200 kHz (±0.2 dB) <p>Input impedance: 0.4 pF, 20 G Ohm 0.4 pF, 40 G Ohm (26HG) <p>Output impedance: (typical) 55 Ohm <p>Output connector: 4/7-pin LEMO male <p>Power supply, Single: 28 V, 0.7 mA to 120 V, 2.5 mA <p>and Dual: ±14 V, 0.7 mA to ±60 V, 2.5 mA <p>Noise: A-weighted and: < 2.5 µV (typically 1.8 µV) rms < 2.3 µV (typically 1.5 µV) rms (26HG) <p>linear (20 Hz - 20 kHz): < 6 µV (typically 3.5 µV) rms < 5.7 µV (typically 3.2 µV) rms (26HG) <p>Gain: –0.25 dB (typical) <p>Operating temperature: –30 °C to + 70 °C <p>Storage temperature: –40 °C to + 85 °C <p>Dimensions and weight 26AA, 26AC, 26AL, 26HG and 26TC (ex. cable): <p>diameter: 6.35 mm (¼") <p>length: 43 mm <p>weight: 8 g <p>Dimensions and weight 26AB and 26AN: <p>diameter: 12 mm (0.47") <p>length: 67.6 mm <p>weight: 22 g