The Investigator of the audio signal and RF, also known as Signal Tracer is a tool that can not miss on the bench interested in audio equipment, amplifiers either in assembly or maintenance of audio equipment. Even with simple construction, it is quite necessary to detect defects more quickly.
As a follower of the audio signal and RF, can make maintenance of equipment such as amplifiers, preamplifiers, radios, car audio, transmitters, recorders, televisions and more. The basic operation is to follow the audio signal to a point where it is not available or is undergoing any change should not occur.
About circuit audio signal and RF follower for bench maintenance
To learn how to use this tool, I suggest you download this PDF of the Newton C. Braga (Portuguese language) – Using test instruments measure.
Circuit diagram of the audio and RF Signal investigator
Suggested printed circuit board for mounting of the circuit
List of material for assembly of the circuit With Lm386
|Resistor’s 1/4 Watt 5%|
|R1||470K – Yellow, Violet, Yellow, Gold|
|R2||10 – Brown, Black, Black, Gold|
|C1,C6||470µF/25V – Electrolytic Capacitor|
|C2||100nF – Ceramic capacitor|
|C3, C5, C8||10µF / 25V – Electrolytic Capacitor|
|C4||270pF – Ceramic capacitor|
|C7||47nF – Polyester or Ceramic Capacitor|
|D1||1N4004 or equivalent – silicon diode rectifier|
|D2||1n34or equivalent – Germanium Diode|
|IC1||LM386N-1 – Integrated circuit audio amplifier – Dil8|
|IN||Connector for RF or Audio signal input|
|OUT||Connector for speaker|
|DC_9V||Jack to power, connect the external power supply|
|P1||47K – potentiometer|
|BAT||9V Volt battery|
|S1||Key to switch between AF and RF|
|Solder, wire, PCI, Cash, end of tests, etc..|
Download Files for mounting the Signal Investigator – PDF, Printed circuit board, Circuit diagram, Layout and Silk Screen components, LM386 Datasheet.
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