ETMC Technologies :: G.R.A.S. Sound & Vibration :: Type 26CF - a 1/2-inch Preamplifier for connection to G.R.A.S. CCP input channels, e.g. see Type 12AL. It has a standard BNC output connector and is for use with prepolarised microphones. It is delivered without a cable. It also has two flush-mounted switches for selecting various combinations of gain and filtering, i.e.:Gain switch settings: * 0dB - for normal microphone signals. * +20dB - for boosting weak microphone signals. Filter switch settings: * A-Weighting - as required in standard measurements. * Linear - to let the microphone signal pass unfiltered. * High-pass - to cut off unwanted low frequencies

<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/00012/00045/00092/00329/">no-frames</A>.</p> <p>The G.R.A.S. 1/2-inch Preamplifier Type 26CF is for connection to G.R.A.S. CCP1 input channels, e.g. see Type 12AL. It has a standard BNC output connector and is for use with prepolarised microphones. It is delivered without a cable. <p>It also has two flush-mounted switches for selecting various combinations of gain and filtering, i.e.: <p>Gain switch settings: <p> * 0dB - for normal microphone signals. <p> * +20dB - for boosting weak microphone signals. <p>Filter switch settings: <p> * A-Weighting - as required in standard measurements. <p> * Linear - to let the microphone signal pass unfiltered. <p> * High-pass - to cut off unwanted low frequencies <p>The Type 26CF can be used with the following ½" G.R.A.S. prepolarised microphones: <p> * Type 40AE <p> * Type 40AD <p> * Type 40AO <p> * Type 40AQ <p>And with the following 1/4" G.R.A.S. prepolarised microphones using the Adapter RA0019: <p> * Type 40BE <p> * Type 40BD <p><p>1 Constant Current Power <p><p>Specifications Type 26CF <p>Frequency range: 2.5 Hz - 200 kHz (±0.2 dB) <p>Input impedance: 0.4 pF, 20 G Ohm <p>Output impedance: < 50 Ohm <p>Output connector: Coaxial BNC <p>Power supply: 4 mA to 20 mA (typically 4 mA) <p>Noise: A-weighted and: Typically 10 µV (built-in A-weighted) rms <p>linear (20 Hz - 20 kHz): Typically 8 µV rms <p>Gain: –0.25 dB (typical) <p>Operating temperature: –30 °C to + 70 °C <p>Storage temperature: –40 °C to + 85 °C <p>Dimensions: <p>diameter: 12.7 mm (½") <p>length: 92 mm <p>weight: 30 g