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en.wikipedia.org/wiki/Detector_(radio)

In radio, a detector is a device or circuit that extracts information from a modulated radio frequency current or voltage. The term dates from the first three decades of radio (1888-1918). Unlike modern radio stations which transmit sound (an audio signal) on an uninterrupted carrier wave, early radio stations transmitted information by radiotelegraphy.

www.amazon.com/radio-wave-detector/s?page=1&rh=i:aps,k...

RF Bug Detector, Amzchen RF Signal Detector Wireless Anti-spy Hidden Camera Lens Detector Radio Wave Signal Detect Full-Range GSM Device Finder for Anti Eavesdropping Candid GPS Tracker (Bug Detector) 3.3 out of 5 stars 24. $24.98 $ 24. 98. Get it as soon as Tue, Apr 16.

www.reference.com/science/radio-waves-detected-a294128c0a...

Radio waves are detected using electrical circuits that receive these electromagnetic signals in an antenna, and then the radio frequencies are modulated through capacitors before emerging as sound in a speaker. Radio waves are normally less than a kilohertz long up to 20 gigahertz.

www.detectorall.com/categories/Radio-Frequency-Detector

Besides the hidden camera detector is also one type of radio frequency detectors and once it founds the camera that may excavate your privacy and do harm to you, it can effectively prevents you from being shot by candid cameras or heard by hidden bugs and ensures your absolute privacy.

www.youtube.com/watch?v=2vimFkG1gvk

How to detect radio wave (Radio Wave Detector)! Sandeep Baruah ... When the radio waves from the mobile phone passed through the copper loop, the free electrons in the copper wire starts ...

archive.org/details/EarlyRadioWaveDetectors

Vivian J. Phillips Early Radio Wave Detectors Peter Peregrinus Ltd. 1980 Acrobat 7 Pdf 29.4 Mb. Scanned by artmisa using Canon DR2580C + flatbed option Includes bibliographical references and index

www.ebay.com/bhp/radio-frequency-detector

Ghost Detector adopts wireless RF detection to check if there are any wireless devices with the frequency between 100-2400MHz ranging from 1cm to 10m. Radio frequency finder. 1 x RF Wireless Signal De...

en.wikipedia.org/wiki/Magnetic_detector

The magnetic detector or Marconi magnetic detector, sometimes called the "Maggie", was an early radio wave detector used in some of the first radio receivers to receive Morse code messages during the wireless telegraphy era around the turn of the 20th century. Developed in 1902 by radio pioneer Guglielmo Marconi from a method invented in 1895 by New Zealand physicist Ernest Rutherford it...

electronics.howstuffworks.com/.../metal-detector5.htm

BFO Technology - BFO metal detectors use radio waves to locate metal targets in the ground. Learn about BFO metal detectors and find out how BFO technology works.

www.homedepot.com/p/Economy-Hidden-Bug-Detector-with-Radio...

Detect hidden video cameras and audio bugs with the help from this Economy Bug Detector with Radio Frequency and Lens Finder. ... The Dome Home Automation DMMS1 Z-Wave Certified Motion The Dome Home Automation DMMS1 Z-Wave Certified Motion Detector tracks motion in your home helping you keep your family safe. When motion is detected your Z-Wave ...