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Can't Register? Can't Log In? START HERE
Please read BEFORE contacting admins
Topics: 3
Posts: 3
Last Post:
Other Issues
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Announcements
Read this first before posting
Topics: 2
Posts: 2
Last Post:
Commercial vs Non-commercial posts
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| Inside the Metal Detector | ||||||||||||||||||
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ITMD1&2
Discussions concerning content, circuitry, source code, etc for the 1st & 2nd editions.
Topics: 61
Posts: 697
Last Post:
Probe PCB from Silverdog
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ITMD3
Discussions concerning content, circuitry, source code, etc for the 3rd edition.
Topics: 23
Posts: 628
Last Post:
Errata
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| Technology | ||||||||||||||||||
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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: 5,615
Posts: 86,763
Last Post:
Ivconic Tries to Be a Smart A.rse
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PI Technology
Tech discussions specific to Pulse Induction
Topics: 464
Posts: 25,615
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464 | 25,615 |
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Coils
Same as the Tech forum, but coil-specific.
Topics: 2,359
Posts: 25,004
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2,359 | 25,004 |
by Byko
Yesterday, 10:45 AM
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Modifications
Detector mods, plus any other useful add-ons.
Topics: 764
Posts: 7,848
Last Post:
GPX 4500 and GPX 5000 External Speaker
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764 | 7,848 |
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Schematics
If you have a schematic to share, post it here. Please read the Intro post for rules on posting schematics.
Topics: 1,639
Posts: 31,491
Last Post:
Forgotten metal detector .. off resonance
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General Detectors
A place to discuss the non-technical aspects of metal detectors. Your favorite detectors, favorite features, or favorite accessories.
Topics: 83
Posts: 1,412
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83 | 1,412 |
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Magnetometers
Tech discussions on mags.
Topics: 751
Posts: 4,265
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751 | 4,265 |
by etznab
09-08-2026, 11:52 PM
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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
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15 | 180 |
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Side Scan Sonar
Tech discussions on sonar, transducers, and towfish construction.
Topics: 873
Posts: 3,293
Last Post:
JW Fishers Pulse 12
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Geophysics
Other geophysics techniques, including earth resistivity, GPR, infrared, induced polarization, etc.
Topics: 379
Posts: 3,447
Last Post:
Joker Resistivity VERS02
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379 | 3,447 |
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Tools & Techniques
Vacuum forming, coil winding, packaging... anything mechanical.
Topics: 209
Posts: 2,263
Last Post:
Schematics & Spice
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209 | 2,263 |
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General Electronics
Cool circuits, tips, techniques, PCB methods, test equipment, etc.
Topics: 604
Posts: 5,960
Last Post:
ENOB
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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: 61
Posts: 532
Last Post:
No clue about the title here!
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61 | 532 |
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| Projects | ||||||||||||||||||
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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: 842
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12 | 842 |
by ivconic
08-11-2026, 02:51 PM
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Completed Projects
Projects that have been reasonably completed
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Active Projects
Projects that are currently being developed
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Abandoned Projects
Project that were never completed but may still have good info
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| Misc | ||||||||||||||||||
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Buy-Sell-Trade
Detectors, parts, electronics, and so forth. No dealer restrictions.
Topics: 1,094
Posts: 5,721
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1,094 | 5,721 |
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Treasure Magazines & Books
Buy-Sell-Trade-Discussion specifically for treasure mags, books, & other publications.
Topics: 213
Posts: 456
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213 | 456 |
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Vintage & Collectable
Pics & info on vintage detectors, for those who like "the good ol' days" of digging everything.
Topics: 192
Posts: 1,048
Last Post:
The Compass Forum has a new web address
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192 | 1,048 |
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Melbeta's Vintage Files
Unique vintage metal detector info donated by denizen 'Melbeta'.
Topics: 91
Posts: 606
Last Post:
Discrimination just does not work!!
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91 | 606 |
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Free Advertising
Those who have products & services they would like to advertise may do so here. Please read the Intro post.
Topics: 122
Posts: 135
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122 | 135 |
by Rama2389
02-10-2025, 12:48 PM
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Forum Issues & Feedback
Problems with the forums? Suggestions for improvements? Post them here.
Topics: 6
Posts: 55
Last Post:
Trying a different search engine
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| Offsite Forums | ||||||||||||||||||
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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
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Eric Foster's PI Tech Forum
at Findmall.com
Topics: 0
Posts: 0
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Russian Metal Detecting forums
Lots of technical forums, but all in Russian.
Topics: 0
Posts: 0
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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
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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?
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1 | 2 |
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