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WO2021016649A1 - An improved metal detector - Google Patents
https://patents.google.com/patent/WO2021016649A1/en#:~:text=A%20method%20for%20detecting%20a%20target%20using%20a,a%20current%20determined%20position%20in%20a%20selected%20relationship.
Metal detector audio amplifier - BERNZWEIG; DAVID S.
https://www.freepatentsonline.com/4594559.html
1. An accessory device for use with a metal detector of the type using earphones, said device being connected to the audio output of said metal detector comprising: means to amplify low audio signals from said audio output to easily audible levels; means to dampen loud signals causing those signals to be softer, said device including: a casing;
Nokta Makro Simplex+ Metal Detector | Treasures in …
https://treasuresinamerica.com/product/nokta-makro-simplex/
This detector is one of Treasures in America’s favorite beginner detectors and the fact that you can buy for under $300 is even better. The Simplex is fully waterproof up to 10 feet and has proven to do great with finding coins and relics. One of the best budget detectors for trashy areas. Audio Output. Choose an option W/ Headphones W/ No ...
WO2021016649A1 - An improved metal detector - Google …
https://patents.google.com/patent/WO2021016649A1/en
A method for detecting a target using a metal detector, comprising: transmitting a transmit magnetic field using a transmitter; determining positions of a …
Fisher Gemini-3 Metal Detector | Kellyco Metal Detectors
https://www.kellycodetectors.com/fisher-gemini-3-metal-detector
Audio Output: Built-In Speaker and 1/4" Headphone Jack; Choose between High, Normal, and Low Mineralization Settings with 3-Position Toggle Switch; 3 Auto-Tune Modes with 2 Re-Tune Speeds for Nugget Hunting in Almost Any Ground Condition; Features: Detects All Metals : Sensitive to Large, Deep Objects or Ore Veins
Metal detector audio amplifier - BERNZWEIG; DAVID S.
https://www.freepatentsonline.com/4644290.html
1. An accessory device for use with a metal detector of the type using earphones, said device being connected to the audio output of said metal detector comprising: means to amplify low audio signals from said audio output to easily audible levels: means to dampen loud signals causing those signals to be softer including:
Whites TDI Pro Metal Detector - BIG BOYS HOBBIES
https://bigboyshobbies.net/whites-tdi-pro-metal-detector
Whites TDI Pro Metal Detector Specs. Adjustable Length: 46"-53" All Metal Audio: VCO Audio Output: Speaker & 1/4 Headphone Batteries: 8 "AA" Battery Life: 8 Disc Audio: All Options Optional Coils are Available Standard Coil: 12" Number of Presets: 3
BBASICS AND THEORYASICS AND THEORY - Metal …
https://www.minelab.com/__files/f/11043/KBA_METAL_DETECTOR_BASICS_%26_THEORY.pdf
Metal detectors work on the principle of transmitting a magnetic fi eld and analyzing a return signal from the target and environment. The transmitted magnetic fi eld varies in time, usually at rates of fairly high-pitched audio signals. The magnetic transmitter is in the form of a
Metal Detectors - Part 1 - Phil Pem
https://www.pe2bz.philpem.me.uk/Comm01/-%20-%20Ion-Photon-RF/-%20Metal-Detectors/-%20BuildPlans/-%20BFO/B-006-Cheesemd/cheesemd1.pdf
specifically for use in metal detector circuits. An example is the CS-209A IC (Maplin stock code UH59P). The device makes use of the fact that metal in close proximity to an oscillator tuned circuit affects the Q of the circuit and hence the signal amplitude. A level detector monitors the oscillator output and switches when a preset threshold is reached.
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