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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, 03:59 PM
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Quote:
It will be £28 for Germany, which includes the book + P&P. To order by Paypal:
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#8
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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#9
11-17-2012, 09:54 AM
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Any mention of me?
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#10
11-17-2012, 12:06 PM
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We'd hate you to actually learn something, as it would ruin the entertainment value. 
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#11
11-18-2012, 08:22 AM
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The truth is hard to absorb into a dillusionally ill mind
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#12
11-18-2012, 10:05 AM
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 It is always important to understand the facts first, before posting. Also read JP's reply, which may give you a hint. 
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#13
11-18-2012, 09:23 AM
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 ...  Is it a gold-finding LRL book, or is it a technical book about metal detectors? Some folks will never know, and the forum entertainment will live on! Best Wishes,  J_P
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#14
12-11-2012, 07:53 AM
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It spells, I hope I retire on this one. Tahiti here I come! Knew there was a conspiracy behind it all. rgds
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#15
12-11-2012, 09:19 AM
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Quote:
__________________
Global capital is ruining your life? You have right to self-defence!
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Hybrid Mode
