Clicking on the picture will take you to a slightly more readable version.
This article was published in and is courtesy of Lost Treasure Magazine, www.losttreasure.com
Writers comment: This is a really good machine to know how to make and use for a variety of reasons. When I first invented it in the early 90s it was because I could not afford the audio amplifiers on the market, and I also wondered about playing music as the field signal. This is what it became, and it can be used in everything from personal defense to espionage to metal detecting, and more.