The Ringer in Small Steps - Part 3

Today I am showing how sensitive the Receiver Coil (L3) is and how the ground makes a difference.
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In this small series I want to show you how to build this device step by step and also understand what is going on, at least enough to get you going. Good luck.
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------- What is this about ?
This is a replication of "The Ringer" from MTech Industries @    / @mtechindustries2022  
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The Ringer Project: https://www.patreon.com/posts/ringer-...
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Original Experiment:    • 🌩 OVER 1 HOUR DEMONSTRATION OF THE NE...  
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