CONTENTS
About Your Gemini-3 ............................................................... pg. 3
Basic Theory of Operation ....................................................... pg. 4
Depth pg. 5
Transmitter ................................................................................. pg. 6
Receiver .................................................................................... pg. 7
Searching .................................................................................. pg. 8
Narrow Scan Inductive Search ........................................... pg. 8
Set Up ............................................................................. pg. 8
Tuning ............................................................................. pg. 9
Operation ...................................................................... pg. 10
Wide Scan Inductive Search ............................................... pg. 12
Set Up ............................................................................. pg. 12
Tuning ............................................................................. pg. 12
Operation ...................................................................... pg. 13
Tracing ....................................................................................... pg. 14
Inductive Tracing.................................................................. pg. 14
Set Up ............................................................................. pg. 14
Tuning ............................................................................. pg. 14
Operation ...................................................................... pg. 15
Conductive Trace ................................................................ pg. 15
Set Up ............................................................................. pg. 15
Tuning ............................................................................. pg. 16
Operation ...................................................................... pg. 16
Prospecting Tips ........................................................................ pg. 17
Mapping ................................................................................ pg. 17
Locating Placer Deposits ..................................................... pg. 17
Sources of Error ..................................................................... pg. 18
Battery Replacement ............................................................... pg. 19
Treasure Hunters’ Code Of Ethics ............................................ pg. 20
Where To Use Your Metal Detector In The U.S. ...................... pg. 21
Specifications ........................................................................... pg. 22
Using Headphones ................................................................... pg. 23
23
Notes
1.
Subject to improvement or modification without notice.
2.
Approximate.
3.
Voltage Controlled Oscillator. Volume and pitch
both increase as target is approached for easier, more
accurate pinpointing.
4.
With optional ground plate assembly.
5.
Optional stereo/mono headphones.
6.
Use of headphones will significantly increase battery life.
Fisher Research Laboratory does not warrant suitability to
specific use. Fisher Research Laboratory shall in no event be
liable for any direct, incidental, consequential or indirect
damages.
SPECIFICATIONS
Using headphones (not included) improves battery life, and
prevents the sounds from annoying bystanders.
It also allows you to hear subtle changes in the sound more
clearly, particularly if searching in a noisy location. For safety
reasons, do not use headphones near traffic or where
other dangers are present. This device is to be used with
interconnecting cables/headphone cables shorter than three
meters.
USING HEADPHONES
