An electronic device, a Radio Frequency (RF) detector picks up RF signals that are transmitted by bugs and other listening equipments. You may but these from gadget and spy stores online, but these devices generally cost 200USD or higher. You can build a Handheld Radio Detection Device at home inexpensively, if you wish to know whether anyone is eavesdropping on your conversations.

How to Create a Handheld RF Detector at Home?

  • First, you have to put all your materials on your working table. Use wire strippers to remove the ends from the 41-AWG enameled copper wire. Following stripping, two wires would be exposed.
  • Use the 41-AWG wire to make a 19-turn coil around the toothpick end. Use the copper wire’s first end to do this.
  • Put glue to one of the coil’s end to make sure it remains secure. Pass the wire’s other stripped end through the brass tube having a diameter of 0.090-inch. Use wire strippers again to strip the surface of another 0.5-inch wire, beginning from the tube’s end.
  • Pair to the BNC connector the 41-AWG copper. You can find 2 small wires in the stripped wire. The first wire has to be soldered on the BNC connector’s “+” contact. Solder the wire also to the connector’s “–” side.
  • Use epoxy to join the brass tube and the connector and allow time to dry. Apply glue onto a cotton swab and apply it onto the external side of the wire that is coiled round the toothpick.
  • Put the toothpick in the brass tube. Now push the wires that are glued, so that they are attached to the glass tube’s sides. Allow them to stick and dry together.
  • Fix the Handheld Radio Detection Device voltmeter’s female BNC connector to the BNC connector, and activate the voltmeter.
  • Move around the brass tube and check whether it works properly.