Low cost Hydrophone amplifier with high input impedance. Type A1001 Small amplifier intended for building in together with a small battery like a 9Volt PP3 or a 12Volt accu. Powersupply cable is delivered with the unit. Highpass filter and Gain settings are to be preset internally with a screwdriver. Description A1001 Hydrophone Voltage Amplifier Very low noise. Extremely high input impedance. Wide frequency bandwidth. Low current consumption. Small and handy version. Includes presets for High Pass filter and Gain controls. BNC connectors In and Out. Water splash proof. Intended for use in the field or for building in together with a battery Technical data. A1001 Gain Control : Highpass Filters : Filter Responses : Frequency Range : Relative Input Noise : +10 +20 +30 +40dB 1 / 10 / 100 / 1kHz 1st.order Low Pass RC network. 1Hz to 1MHz <1uVolt rms @ 1kHz (bw=500Hz...8kHz) Input for Piezo ceramic transducer with a capacitance of 100pF to 10nF Recommended type : RESON / TC4033 Input impedance : 1Gohm // 5pF Relative input noise : < 2.0 microVolt at 10dB gain < 1.5 microVolt at 20dB gain < 1.2 microVolt at 30dB gain < 1.0 microVolt at 40dB gain Noise bandwidth : 500Hz to 8kHz High Pass filter to filter off seawaves. -6dB at 1Hz / 12dB pr.octave -3dB at 10Hz, 100Hz and 1kHz 6dB pr.octave at 10Hz, 100Hz and 1kHz GAIN control in 10dB steps High frequency limit depends on gain setting : 1MHz at 10dB gain 800kHz at 20dB gain 600kHz at 30dB gain 300kHz at 40dB gain Output level max.+10dBm at 12Vdc Output level max.+20dBm at 24Vdc Output imp.: 10R+100uF Cable drive: 50meter max.