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#1
09-14-2012, 11:43 PM
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New Metal Detector Book!
Carl and I are proud to announce that we have successfully completed the writing of a technical book on metal detector technology.
This is the first in-depth book on this subject since 1927; and it feels like we've been working on it for that long! Countless hours have gone into the production of this book, not only writing, but building and testing the many projects, sometimes multiple times. Inside the METAL DETECTOR ISBN 978-0-9858342-0-3 Publication date: September 2012 300 pages $34.95 - available directly from Geotech. Here is the Table of Contents to whet your appetite: Introduction Chapter 1: History of the Metal Detector The People The Applications The Companies Chapter 2: The BFO Principle Chapter 3: Designing a BFO Detector Reference Oscillator Design Search Oscillator Design Mixer and Detector Design Headphone Amplifier The Complete BFO Detector Using Oscillator Harmonics Construction Details Chapter 4: A Simple Probe That Works! Search Oscillator Automatic Tracking Circuit Construction Details Chapter 5: Induction & Coils Magnetic Fields Induction Induction Balance Eddy Currents Search Coils Mineralization Effects Chapter 6: Principles of Induction Balance Transmit Frequency What the Experts Say So What's Best? Power Supply Evaluation of Initial Design Decisions Chapter 7: Target Discrimination Phase Demodulation Motion Versus Non-motion Discrimination With an Analog Detector Chapter 8: Transmit-Receive Detector Transmit Oscillator RX Amplifier Audio Output Power Supply Testing Construction Details Chapter 9: Designing an IB Detector Aconyms Stabilized Power Supply Transmit Oscillator Receiver Preamp Designing a VLF IB Detector with GEB GEB and DISC sampling CMOS Analog Switches Motion Mode of Detection Audio Oscillator, Chopper and Amplifier A Little More Info On Discrimination Automatic Battery Check Circuit Battery Pack The Completed Prototype Initial Setup Procedure Real World Testing But Can We Do Better? Improving the Design Comparator Operation Detector Calibration Real World Testing (again) In Conclusion Construction Details Chapter 10: IB Coil Experiments Experiment #1: MD-3030 10" Concentric Coil Experiment #2: Fisher M-scope 11" Concentric Coil Experiment #3: Garrett Crossfire 8" Concentric Coil Experiment #4: Troy 9" Concentric Coil Experiment #5: Viking 6DX Double-D Coil Constructing Homemade IB Coils Double-D Coil Experiment Double-O Coil Experiment Concentric Coil Experiment Omega Coil Experiment Conclusion Step-by-Step Instructions for Constructing a DD Coil Chapter 11: Pulse Induction Principles PI Transmit PI Front End Sampling Digging in Deeper Chapter 12: Pulse Induction Designs PI Design 1 PI Design 2 PI Design 3 PI Design 4 Bonus: PI Design 5 Advanced Topics Power Supply Preamp Sampling Ground Balance Coils Really Advanced Topics Construction Details --- PI-1 Construction Details --- PI-2 Construction Details --- PI-3 Construction Details --- PI-4 Chapter 13: Long Range Locators Dowsing History Reactions Why Dowsing "Works" Dowsing Tests Empirical Results Summary LRLs "Passive" LRLs "Active" LRLs MFD Theory Summary Treasure Auras Photographing Treasure Auras Chapter 14: Pistol Detector Ferrite Receiver TX Circuit The Sky and Compass Effects Detecting the Anomaly The Front Panel Controls TR Mode of Operation Nulling the Ferrite Coil But Does it Actually Work? Meaning of TOTeM Construction Details Conclusion Chapter 15: Loose Ends Multi-frequency Design Myths & Fallacies Is it an antenna? The Halo Effect Metal or Plastic Stem Bolt? Electrostatic Shielding Power Output Coil Sensitivity The Concentric Ring Experiment Component Marking Standard Electromagnetic Terminology PC Boards Appendix A: Air-Cored Coil Calculator The Visual Basic Version The Tcl/TK Version The Javascript version Accuracy Appendix B: Resources Web Sites Books Magazine Articles Patents Index Last edited by Qiaozhi; 09-20-2012 at 04:42 PM. 
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#4
09-15-2012, 06:24 AM
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very good work.congratulations
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#5
09-15-2012, 12:00 PM
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Hi Qiaozhi
my congratulation to you and Carl. The book looks very good and is certainly very interesting. The book is a great work. I would buy the book very much. I live in Germany and would like to know if I can order it somewhere in Iternet, or can I the book directly order from you? sorry for my bad english. Best regards
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#6
09-15-2012, 03:33 PM
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Ordering instructions for the UK, Europe and surrounding countries:
UK - the total cost will be £24, which includes the book + P&P. Delivery should take around 3 days. Europe - the cost will be £28, which includes the book + P&P. Delivery should take around 5 days. Non-European countries - please ask for a price, although in most cases it will be the same cost as Europe. I am currently waiting delivery of 100 padded jiffy bags. When these arrive, the books will be dispatched. Paypal to qiaozhi@geotech1.com For the Americas, Asia and Oz, Paypal to carl@geotech1.com. Shipping is a flat $4 in the US, for anywhere else the cost of shipping will need to be calculated, and it may be pricey because postal rates have gone into orbit. When you purchase by Paypal, your delivery address is automatically sent, so the ordering process should be very straightforward. In the near future Carl will be moving the book ordering information to a dedicated area on Geotech.
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#7
09-15-2012, 03:57 PM
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Sorry. If you purchase the book and then find some of the words difficult, you only have to ask here on the forum. We will be pleased to help.
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#8
09-15-2012, 03:59 PM
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It will be £28 for Germany, which includes the book + P&P. To order by Paypal:
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#10
09-15-2012, 04:17 PM
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 So the total cost is £28, which includes the book + P&P. No biography from either Carl or myself. The technical stuff took up all the available space. Anyway, it's about metal detecting technology, not about us. 
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#11
09-15-2012, 04:32 PM
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 Anyway i ordered the book so now is your job .. Regards
__________________
Geo
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#12
09-16-2012, 10:20 AM
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When the packaging arrives I will dispatch the book immediately and let you know it's on its way.
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#13
09-16-2012, 11:29 AM
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Thanks for all, i would highly appreciate if there was in the book a very brief biography of George Overton .I am sure that this book is a kind of encyclopedia on metal detectors although i am not sure what writes about pistol detector. My Regards
__________________
Geo
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#14
09-16-2012, 11:48 AM
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#16
09-16-2012, 08:22 PM
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 My stock of books is running out fast! Only a hand-full left. The books will be supplied on a first-come first-served basis. When my current stock is exhausted, there will possibly be a week or two delay before I receive the next shipment. Everyone who has placed an order so far is guaranteed a book from the current stock. I will make another post when the ones I have are sold. You will still be able to order, but please be aware that there will an additional delay.
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#17
09-19-2012, 09:17 PM
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Hi Qiaozhi and Carl,
Congratulations on your first book! It's good to see you two actually did it. From what I see in the table of contents, this is bound to be the definitive source of reliable information about how metal detectors work, written by the foremost engineers in the world of metal detecting. Considering that this book draws on all the brilliant contributions that we see in the Geotech forum, as well as the years of experience you and Carl have in designing and building metal detectors, there probably is no other book about metal detecting to compare. Who else could write such a book, other than electronic engineers who are surrounded by metal detector forum topics, questions, circuits, and all that goes with it? With any luck, the proceeds from selling this book will pay for the geotech forum and the LRL annex for years to come, and then some. The best news is this is the first thing I have seen advertised in the LRL forum that I am certain is not a fraud! The price is no where near 1000 euros, and what we get for our money is pure quality, nothing else. I will be sending my order to the USA outlet as soon as I get a chance to set up paypal. Hopefully we can get an autographed edition, considering we are online forum contributors...  Congratulations again! J_P
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#20
09-20-2012, 07:56 AM
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#23
09-27-2012, 09:20 AM
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Obviously it does actually function as an electronic detector, but whether it's detecting some emanation from longtime buried gold may be open to debate. Also, it does work as a short range metal detector. Have you built it?
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#25
09-27-2012, 11:24 AM
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Hi Qiaozhi
First of all i congratulate you and Carl for the book you are realising. Now i just want to have one book, so please give full buying details to place an order, plus shipping cost to Santiago Chile SA. I will pay by paypal Regards Nelson Quote:
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