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General
Can't Register? Can't Log In? START HERE
Please read BEFORE contacting admins
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Last Post: Other Issues
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Carl-NC
by Carl-NC
Announcements
Read this first before posting
Topics: 2 Posts: 2
2 2
Inside the Metal Detector
ITMD1&2
Discussions concerning content, circuitry, source code, etc for the 1st & 2nd editions.
Topics: 61 Posts: 696
61 696
Carl-NC
by Carl-NC
ITMD3
Discussions concerning content, circuitry, source code, etc for the 3rd edition.
Topics: 22 Posts: 604
22 604
Sub-Forums:
IB Designs (4/5)
PI designs (5/66)
Technology
Tech Forum
General tech discussions on all types of metal detectors: VLF, 2-box, BFO, off-resonance, PLL, etc. Questions, ideas, and anything else that moves you.
Topics: 5,592 Posts: 86,169
5,592 86,169
PI Technology
Tech discussions specific to Pulse Induction
Topics: 441 Posts: 24,907
441 24,907
Coils
Same as the Tech forum, but coil-specific.
Topics: 2,342 Posts: 24,899
Last Post: Meking good pi coil
2,342 24,899
AK48
by AK48
Modifications
Detector mods, plus any other useful add-ons.
Topics: 761 Posts: 7,838
761 7,838
Orbit
by Orbit
Schematics
If you have a schematic to share, post it here. Please read the Intro post for rules on posting schematics.
Topics: 1,629 Posts: 30,986
1,629 30,986
Aziz
by Aziz
General Detectors
A place to discuss the non-technical aspects of metal detectors. Your favorite detectors, favorite features, or favorite accessories.
Topics: 76 Posts: 1,378
76 1,378
Magnetometers
Tech discussions on mags.
Topics: 746 Posts: 4,251
746 4,251
Technical Books, Papers, and Literature
Technical books, papers, and literature related to treasure hunting technology. Any books written by Geotech members are made sticky at the top of the forum.
Topics: 15 Posts: 180
15 180
Side Scan Sonar
Tech discussions on sonar, transducers, and towfish construction.
Topics: 873 Posts: 3,293
Last Post: JW Fishers Pulse 12
873 3,293
Yury
by Yury
Geophysics
Other geophysics techniques, including earth resistivity, GPR, infrared, induced polarization, etc.
Topics: 379 Posts: 3,418
379 3,418
Tools & Techniques
Vacuum forming, coil winding, packaging... anything mechanical.
Topics: 207 Posts: 2,200
Last Post: AI
207 2,200
Aziz
AI
by Aziz
General Electronics
Cool circuits, tips, techniques, PCB methods, test equipment, etc.
Topics: 600 Posts: 5,934
Last Post: trash technology
600 5,934
ivconic
by ivconic
Programming
This is a special section dedicated to coding techniques, tips, tricks, methodology, programming various modules, MCUs, digital filters, etc. Basically, anything code-related.
Topics: 59 Posts: 522
Last Post: Telegram Attack!
59 522
EL NINO
by EL NINO
Projects
Project Competition
Got a something in mind you would like to see designed? Post it here and see who can come up with the best solution.
Topics: 12 Posts: 762
12 762
Completed Projects
Projects that have been reasonably completed
Sub-Forums:
Arduino Nano PI (9/959)
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Voodoo (6/1,792)
Active Projects
Projects that are currently being developed
Sub-Forums:
AMX Project (11/917)
Abandoned Projects
Project that were never completed but may still have good info
Sub-Forums:
GPR Project (38/506)
Kingfisher PI (2/56)
Surfmaster II (19/568)
Tinkerer's IB-PI (32/1,822)
USB Projects (10/1,887)
Misc
Buy-Sell-Trade
Detectors, parts, electronics, and so forth. No dealer restrictions.
Topics: 1,085 Posts: 5,697
Last Post: DISCOVER X3
1,085 5,697
ivconic
by ivconic
Treasure Magazines & Books
Buy-Sell-Trade-Discussion specifically for treasure mags, books, & other publications.
Topics: 213 Posts: 456
213 456
Vintage & Collectable
Pics & info on vintage detectors, for those who like "the good ol' days" of digging everything.
Topics: 191 Posts: 1,046
191 1,046
Melbeta's Vintage Files
Unique vintage metal detector info donated by denizen 'Melbeta'.
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91 606
Free Advertising
Those who have products & services they would like to advertise may do so here. Please read the Intro post.
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122 135
Forum Issues & Feedback
Problems with the forums? Suggestions for improvements? Post them here.
Topics: 4 Posts: 32
4 32
Kemper
by Kemper
Offsite Forums
Advanced Metal Detecting Research Lab
Italian website run by Leonardo Ciocca. Since 2009, a technical reference point. Objective and impartial to all lovers of the metal detector.
Topics: 0 Posts: 0
0 0
Topics: 0 Posts: 0
0 0
Eric Foster's PI Tech Forum
at Findmall.com
Topics: 0 Posts: 0
0 0
Pulsdetektor Forums
Tech forums dealing with the various Pulsdetektor projects. German only, Click Here for a BabelFish English translation.
Topics: 0 Posts: 0
0 0
Russian Metal Detecting forums
Lots of technical forums, but all in Russian. Click Here for a BabelFish English translation.
Topics: 0 Posts: 0
0 0
THunting.com
THunting.com is the former host for Geotech. These are general Treasure Hunting forums.
Topics: 1 Posts: 7
Last Post: End of an era
1 7
Tanu
by Tanu
LongRangeLocators.com
The world's largest forum dedicated to the discussion of LRLs and related devices.
Topics: 1 Posts: 2
Last Post: What can they do?
1 2
GeoMax
by GeoMax

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There are currently 4149 users online. 79 members and 4070 guests.

Most users ever online was 87,796 at 08:10 AM on 03-19-2026.

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Welcome to our newest member, gazza54.

Latest Topics

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  • scs-bg
    SBG- slow motion metal detector
    by scs-bg
    Slow motion discriminator.
    Many have noticed that when a detector is very fast, the depth is reduced. The detector works restlessly and perceives interference. A good solution is a detector that works with slow signal tracking. In this option, there is almost no loss of depth. But then the discrimination
    ...
    05-05-2026, 11:10 AM
  • jstcq.com
    Wireless Smart PI (Pulse Metal Detector)
    by jstcq.com
    Wireless Smart PI (Pulse Metal Detector)
    Created by Jinsheng Metal Detector Factory. From China.
    Its high intelligence enables diversified functions and is extremely portable. Based on powerful algorithms, it has super depth and anti-interference capabilities.

    1.Sound, no sound,...
    05-05-2026, 06:57 PM
  • Aziz
    Induction Balance Stuff - Single/Multi Frequency Response, GB, Disc, Measurements, Ideas, Fun, etc.
    by Aziz
    Hi all,

    I'm starting a new long thread - a funny blog of my experiments, measurements, experience and findings - related all the good stuff in the thread topic.
    The goal of this effort is:
    - to have fun and entertain you
    - to improve metal detection, GB, Disc, etc....
    12-29-2025, 01:31 PM
  • GeoMax
    Mini Pulse PI Diskriminator - Sascho Bulgaria
    by GeoMax
    Hello,

    A long time ago, this schematic was published (by Sascho ???) on Geotech. At the time, questions were raised regarding how the Pulse IB discriminator circuit works and how the coil windings are oriented and connected. Sascho never responded. The circuit looks interesting, and perhaps...
    05-13-2026, 07:06 PM
  • KRinAZ
    Let's make a closely MXT like detector!
    by KRinAZ
    Hello all, I've been away for a while, getting back to detecting as I have found a few remote old gold mines here in AZ with apparently untouched mine dumps :^>

    So, since White's is sadly no more and the MXT no longer made, I propose a project to make a detector as close as possible...
    04-09-2026, 07:55 PM
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