Garrett Electronics Gti 1500 Deepseeker Metal Detector
By Andy Sabisch
From Page 22
December, 1998 issue of Lost Treasure

Over the past 30 years, Garrett Electronics has developed a number of innovative detectors that have helped treasure hunters worldwide recover all forms of treasure on a regular basis. From coins in a local park, jewelry on an ocean beach, gold nuggets in isolated reaches of Australia and North America, treasure from sunken galleons and artifacts dating back thousands of years, a loyal following of successful detectorists using Garrett detectors has developed.
The GTI 2000, big-brother to the GTI 1500, has proven to be one of the most popular detectors ever produced by Garrett Electronics and for good reason. The performance and features are truly in the professional class and even novice users are able to quickly master the detectors capabilities. The only complaint voiced by some users was that the size of the control housing made it somewhat uncomfortable for younger treasure hunters or those with smaller hands.
Listening to user feedback, Garretts engineers worked on incorporating many of the features found on the GTI 2000 into the compact housing found on the GTA series. After considerable field-testing and re-engineering efforts, the GTI 1500 was released.
If you are familiar with the GTA series or many of the other target ID detectors on the market for that matter, the first thing that strikes you when looking at the meter on the GTI 1500s control housing is a second display area below the target ID-depth reading LCD display. This revolutionary feature was pioneered on the GTI 2000 and is called TreasureVision. This circuit enables you to identify targets with a higher degree of accuracy than previously possible with just the target ID display found on other detectors. In addition to providing a probable target ID on the upper display (nickel, foil, penny, pull tab, quarter, etc.), the GTIs TreasureVision circuit will also provide an indication of the objects relative size.
As users of target ID detectors often discover, a large object such as an aluminum can will read like a coin and small shreds of metal or screwcaps tend to read like a nickel or gold ring. So, strictly relying on a target ID indication will result in a fair amount of extra and often unnecessary digging. The TreasureVision imaging grid, provides an indication of the targets relative size. Five categories, designated as A, B, C, D and E sized targets, will prove invaluable in providing information to aid in determining if a target is worth recovering. The type of targets each corresponds to are: Size A: Targets smaller than coins including small bits of iron and foil. Size B: All U.S. coins and most rings. Size C: Targets larger than coins yet smaller than 12-ounce cans including large class rings, screwcaps, bottlecaps, whole pulltabs and smaller relics. Size D: Targets similar in size to a 12-ounce can. Size E: Targets larger than a 12-ounce can such as artillery shells, caches and other large relics.
This unique feature will greatly increase the number of good targets you will recover in the field, no matter what type of target you are searching for. Additionally, if the TreasureVision circuitry cant accurately interpret the signal received, it displays a series of moving rings which engineers have called the Radiating Array. This can occur if the target is either too small or deep to identify accurately or if the coil was not centered over the target just another feature which helps ensure the user is given as much information as possible to accurately identify a target before attempting to recover it.
In addition to those described above, the GTI also includes the following modes and features all easily adjustable through the convenient touchpads found on the face of the control housing.
Sensitivity, Audio Threshold, Tone and Volume Quickly customize the GTIs signal response to your personnel preferences. Operating Frequency Great for eliminating interference caused by other detectors or nearby electrical sources. Battery Type Select either regular or ni-cad so the battery strength indication accurately displays the current battery condition. Salt Elimination Another GTI-exclusive feature, eliminates the interference caused by wet salt or alkaline ground conditions. Belltone Audio Provides additional information to aid in identifying targets; i.e., a special ringing sound when a coin or other highly conductive target is detected. Backlight Allows you to hunt at night (many areas such as beaches will only let you hunt after the crowds leave) or in low light conditions.
The GTI has five independent discriminate search modes: Coins, Jewelry, Relics, Zero and Custom. The first four are preset by the factory, but all five are adjustable.
The standard searchcoil on the GTI 1500 (and GTI 2000) is unqiue in that it is convex in shape. This is to allow for the imaging circuitry to accurately determine the size of the target. The coils measures 9.5 inches in diameter with an open center to aid in pinpointing. Optional search coils are available; however, currently only the 9.5 inch coil provides both target ID and TreasureVision imaging (the other coils only provide target ID).
The GTI 1500 is powered by eight AA batteries which will provide between 20 and 30 hours of use. Ni-cads can be used with no loss of performance. A nice feature incorporated on the GTI is the removable battery pack found on the GTA line. If weight is a factor, simply slide the pack off the armrest and clip it to your belt.
Field Test
The first site that I took the GTI 1500 to was an abandoned gold mine in the north Georgia mountains. The site dated back to the 1840s and had been used on-and-off up through the 1890s. I had hunted the site a few years ago; however, the high concentration of trash along with a lack of any keepers had kept me from re-visiting it. After hiking nearly a mile from the nearest road to the site, I set the GTI 1500 to the Relics mode and began searching near the foundation of one of the buildings. Signals were received with every sweep; however, they were easy to ignore based on the fact that the target ID reading would not lock-on and they were A, D or E sized targets.
After nearly 20 minutes, I received my first solid, repeatable signal that registered as a B-sized target. Switching to the Pin-Point mode, I quickly centered the coil over the target which read 6 inches." The glint of silver at the bottom of the hole turned out to be an 1874 quarter in nice condition a great addition to my collection. I spent the next few hours hunting the camp area, focusing on targets that registered either B or C and higher than Foil on the target ID meter. While targets that met this criteria were few and far between, those that I did recover resulted in three Indian Head pennies, a Shield nickel, an 1892 Barber dime, a few shotgun shell casings and a 1974 penny (no doubt lost by some other detectorist!).
Before heading home I wanted to see how the GTI 1500 would do searching for larger, deeply buried artifacts from the mining operation. Leaving the detector in the Relics mode, I started hunting near the opening of one of the mine shafts.
After a few minutes I did get a signal that indicated E at greater than 12 inches. After digging through the hard ground to a depth of nearly 20 inches, I pulled a rusted rock chisel from its resting place. A little electrolysis and some preservative would make this a nice addition to my collection of mining implements that I have put together since moving to Georgia. Several other nice artifacts came to light before I started the hike back to the truck.
I visited the site of an abandoned school a short distance from my house. Over a three-day period, I recovered nearly 40 coins and trinkets that I had missed on previous trips. Most of them had come from areas where high concentrations of trash had forced me to give up in search of easier areas. And as a testament to the depth capabilities of the detector, several coins were recovered at 8 inches or more in hard-packed red Georgia clay!
Even in highly mineralized ground that rendered some other top-of-the-line detectors virtually useless, the GTI 1500 was able to make some nice finds including coins dating back to the 1800s, Civil War relics and artifacts from a World War I training camp that has been heavily hunted for more than 20 years.
The GTI 2000 provided treasure hunters with valuable target information previously unavailable. The GTI 1500 incorporates most of the features found on the GTI 2000 in a smaller, lighter package making it well suited for all members of the treasure hunting community. I found that the weight and balance of the unit combined with the wealth of information it provides makes the GTI 1500 ideal for virtually all forms of treasure hunting. The TreasureVision circuitry combined with the above-average performance of the unit will enable beginners and professionals alike to find more keepers in a given amount of time even if there is a high concentration of junk in the area.
The GTI 1500 sells for $899 and comes with the standard 2-year factory warranty. For the name of your local dealer and a copy of Garretts informative buyers guide featuring its complete line of treasure hunting equipment, call the factory at (800) 527-4011 or write Garrett at 1881 W. State St., Garland, Texas 75042-6761. Be sure to tell them you read about the GTI 1500 in Lost Treasure.

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