2 Transistors Signal Generator For Signal Tracing

Signal tracing is a method to find failure section of electronic circuit. This method is very common in troubleshooting audio electronics, since the tool for injection and monitoring will be very simple and cheap. The tracing method is done by injecting a signal source at one point and monitoring the response at other point, where the signal is assumed to […]

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FET Hydrophone Pre-Amplifier

Unwanted noise is eliminated by FET. FET also added capacitance caused by long cobias connecting hydrophone to shore station. Voltage gain is unity. Hydrophone preamp can be used with cables up to 3000 feet long. Use 1 Meg resistor between gate and ground to suppress low frequency excursions of signals if hydrophone moves in water. [Circuit’s schematic diagram source: seekic.com]

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