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This is the RF Probe for Multimeter Circuit DiagramTo measure the RF voltage in a circuit to convert the signal unless they RF voltmeter. This conversion may be done with a very simple circuit, called a point or RF probe. A tip for RF Multimeter has to be made in a metal box with two connectors, one that receives the RF signal and another that goes to the multimeter.  In the case of this circuit the signal passes through two connectors between them and the RF signal is picked up.This signal passes through a 18 pF capacitor, a diode germanium, a resistor of 47 kOhm, and a bypass capacitor 33 nF. The anode of the diode is connected to the positive lead of the voltmeter and the other to ground. RF Probe for Multimeter Circuit Diagram

There’s something fascinating about electromagnetic fields. Thanks to the modern world and the prevalence of electronics and electricity, they’re all around us these days. But because of the extremely limited array of senses that we humans have, we spend most of the time completely oblivious of them. Wouldn’t it be cool to make something simple that could not just detect them, but would allow you look at the waveforms on an oscilloscope. An EMF probe in other words.