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example vlf design heathkit groundtrack gr 1290 vlf metal detector

  • Heathkit Groundtrack GR-1290 metal detector schematic diagram The original coil that came with the Heathkit project was preassembled at the factory. It had a diameter of around 15cm (6 inch).

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  • Sep 14, 2011· Example VLF design: Heathkit Groundtrack GR-1290 VLF metal detector Pulse Induction (PI) metal detectors are sending repeated pulses of electrical current to the search coil, producing a magnetic field.

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  • Jun 04, 2014· This is for a VLF Metal detector which from what i have read looks for small phase changes to determine if metal is found. i may have this all wrong as i am new to electronics but i think that Q8 L1 & L2 are acting as some type of oscillator transmitting a 7.3Khz signal.

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  • Very low frequency (vlf) detector circuit, the post explains a simple yet very effective vlf receiver circuit which can be used for detecting and identifying very low frequencies in the ether which are normally available in hz.

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