Finished up the pre-production unit TRX "quick look" field test today .... The pre-production unit actually exceeds the results I achieved during prototype testing !!
Long story short on depth:
Large gold ring: 5"
Medium gold wedding band: 4"
The TRX will outpace any other hand-held unit I've tried, and believe me, I've tried most all of 'em. On a good day, under the right conditions, I'd say that TRX will keep up with the DX-1 in-line in terms of depth.
White's has hit a "Home Run" with TRX.
Units are shipping "as we speak". Your dealer may already have 'em in stock.
I'm gonna do a more thorough test under different conditions, just like TRX was a detector. As always, I'll post what I find / learn here ....
You NEED one of these !!
Hope this is helpful.
****************** FINAL TEST REPORT WITH FULL RATE PRODUCTION UNIT ***********************
Long story short: I didn't see any drastic differences between the pre-prod and FRP units. Both provided excellent depth as previously reported. If anything, the FRP unit seemed a bit more stable.
I checked all functions and they "work as advertised" in the Owner's Guide. Here's a couple of tidbits you may or may not find useful, and of course will vary with different users ....
1. Lost pinpointer audio: If lost with "speaker up" I could hear the beep at a measured 20 feet. Actually a bit more, but I want to err on the side of safety. (Note: I have a 10 - 15% hearing loss in both ears). If lost with the "speaker down", I could hear the audio at a measured 14 feet. There was a light breeze at the time, and I obviously had my headphones off.
2. Best depth: I found that if I just tap the button (ground grab) before I start the pinpoint process I get the best depth.
3. Target in side of hole: If you move the TRX up and down the side of the hole and your target is there, you'll hear a tone, then silence, then a tone. Start at the top of the hole and work down. First hit = tip of the pinpointer. Then a dead spot. Then tone again. This is both a "side of the hole" indicator and helps locate the target. The target is adjacent to either the first hit (tip of the probe) or adjacent to the "dead spot" midway of the coil.
4. Only used factory default sensitivity (3): There are some posts discussing an "undocumented feature" of the TRX that lets you select various sensitivity settings between 1 and 4. As a rule of thumb, 2 = what you'd expect from other popular brands. 4 gives a bit (1/2") more depth, but makes the unit a bit chatty for my liking.
All the depth data noted in this report is at sensitivity setting = 3. I would say that on average, taking into account different soil types, target sizes, how long the target has been buried, etc, that a TRX user can expect a minimum of 3" depth across the spectrum of "normal targets" including rings, coins, tabs, tops, etc.
5. Batteries: I didn't see any difference in depth / stability / audio / vibration between a fresh set of AA's or a fresh 9V. I expect that a 9V would provide a bit more run time, but with an expected life of 20 hours, either will suit me just fine. I'll stick with the AA's simply because I carry spare AA's for my detectors "just in case", and that means that I only have to worry about one set / type of spares.End Of The Day: TRX is an absolutely solid handheld pinpointer that exceeds the depth of anything else on the market, at least that the half-dozen or so most popular units that I'm aware of.
I can't find any faults or deficiencies with TRX. I highly recommend it !!
Hope this is helpful.