Circuit diagram for c-scope metadec 2 metal detector wanted to find which capacitor designates the depth of signal

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circuit diagram c scop metadec 2

YOU HAVE PROBLEMS WITH THE ANTENA PROBE , PROBLABLY THE METALIC TERMINAL THAT MAKE CONTAC WITH THE ION TIP IS OPEN CK IT , YOU CAN SOLDER IT AND PUT BACK THE INSULATION AT THE SAME POSITION

As long as you use your detector properly and set the sweep speeds correctly, you should be able to get to the following depths on average;

Dime/ Nickel - 4-8 inches

Quarter/Half Dollar - 6-12 inches

Dollar - 8-16 inches

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It will depend on the radio design as to exactly what components to identify as landmarks.

In general, you want to locate the preamplifier stage, and this can even vary by type of circuit. Sometimes you can tap the circuit at the volume control, other times you have to locate the point after the detctor stage which is the stage with the typically glass diodes. Often a single detector diode for AM and either 2 or 4 detector diodes for FM. You can try at this point of the detector. If you touch the solder track with a metal screwdriver and hear a buzz- it helps if you are working near a flourescent light.

If the output circuit is an IC chip, locate the input and try there. Your results will work best with a low impedance microphone.

How many amps do you plan into your circuit?You will need an inverter to get the -10V on one side,and have to figure out the resistance required for both sides to achieve both -10V and + 10V and a rheostat in the circuit between the - side and the + side to adjust the voltage manually.Is that what you want?