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	Model 5113 Low Noise Voltage Preamplifier Low-Noise Single-ended or Differential input modes DC to 1 MHz frequency response Optional low-pass, bandpass or high-pass signal channel filtering "Sleep" mode to eliminate digital noise Optically-isolated RS232 control interface Battery or line power Acoustic astronomy Radio astronomy AC bridge measurements Oscilloscope preamplification Hall-effect signal amplification The model 5113 is a high performance, low noise voltage preamplifier with continuously adjustable gain and optional high, low or bandpass filtering.
	Model 5182 Current Preamplifier Low input impedance Low noise Single-ended virtual ground innput Adjustable snesitivity Bias current monitor (DC) and signal (AC) outputs DC to 1 MHz frequency response Battery or external DC power Photodiode amplification Photomultiplier amplification Ion collector amplification Electron multiplier amplification The model 5182 is a current-to-voltage preamplifier of low noise and low input impedance designed to amplify the extremely low low currents encountered in such areas as photometry and semiconductor research.
	Model 5184 Ultra Low Noise Preamplifier Medium input impedance Ultra low noise Pseudo-differential input Fixed x1000 gain 0.5 Hz to 1 MHz frequency response Battery or external DC power Cryogenic detector amplification The model 5184 is a medium input impedance, AC-coupled, voltage preamplifier which features an ultra low-noise input stage.
	Model 5185 Wideband Preamplifier 50 Ω or 1 MΩ input impedance Low noise x10 or x100 gain DC to > 200 MHz frequency response DC offset control Line power Signal averager preamplification Boxcar averager preamplification Increasing sensitivity of oscilloscopes and fast ADC The model 5185 is a wideband voltage preamplifier with a frequency response from DC to 200 MHz and switchable gain settings of x10 (20 dB) or x100 (40 dB).
	Model 5186 Differential Voltage Preamplifier High input impedance True differential input Adjustable gain 0.5 Hz to 1 MHz frequency response Battery or external DC power Acoustic research Radio astronomy AC bridge measurements Oscilloscope preamplification Hall-effect signal amplification The model 5186 is a high input impedance, low-noise, AC-coupled voltage preamplifier which offers a true differential input.
	Model 181 Current Preamplifier Low input impedance Low noise Single-ended virtual ground input Adjustable sensitivity DC to 200 kHz frequency response Detector bias control Photodiode amplification Photomultiplier amplification Ion collector amplification Electron multiplier amplification The model 181 is a current-to-voltage preamplifier of low noise and low input impedance designed to amplify the extremely low currents encountered in such areas as photometry and semiconductor research

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