By Jeff McClendon
This is for those of you who may be wondering about purchasing an induction balance gold prospecting detector using mid to higher frequencies or just for the curious. I had a chance to do some comparison testing with the detectors below. Sorry, I did not have access to a Goldmonster 1000 or a Fisher Gold Bug 2. These are outdoor air tests in thick EMI and cold temperatures, 28F. I tried to set these up as close as possible, but coil size, DD or Concentric, and EMI susceptibility were out of my control. The detectors were placed on the ground with the coils perpendicular to the ground and each coil made contact with the ground at its heel. All detectors were ground balanced and noise cancelled or frequency shifted for the best possible EMI protection. The only detector that was really handling the EMI well was the 24K. I actually could have run it at maxed out settings, but to be fair I lowered them a bit to try to match the other detectors. Also included is one depth test for these detectors using each detector's coin/ jewelry mode that was used in the air test. This depth test is for a 5" deep US nickel (no snickering please since the Deus and ORX mineralization bars are 3/4 full or more in my dirt). This nickel has been buried for 2 years and currently the ground is frozen. So, these are tough conditions. From my experience with these detectors their air test results here (due to EMI) are very close to actual in the ground results within an inch or so depending on mineralization levels of course. Please notice the coil sizes used in the test before making a judgement.
I'm not trying to start an argument here. I like all of these detectors very much and they are all excellent gold prospecting detectors. This is for reference ONLY. Your results may vary a lot!!!!!!
so all you guys know your Detector? Or so you thought maybe or maybe so you thought?
So lots of you may be asking or have been asking or are curious about which Detector is better and probably assuming the 800 is way better and stronger than the 600. Or which is better for the beginner? The Minelab Equinox 600 or 800? What Detector is more powerful? Therefore producing more finds and at better quality? Or are they in a nutshell the exact same Detector besides A extra mode ( Gold ), and 20 and 40 khz are available to be single frequencies on the Equinox 800 and not the 600. Does The Equinox 600 have 20 and 40 khz in multi frequency? And the 800 has more adjustable tone pitches in more tone brackets and recovery speed is more adjustable and iron bias as well. But are as I said in a nutshell are the same exact animal. Truly deep, capable of all types of metal detecting adventures, fully submersible and the actually find amazing finds. Whatever you buy make sure it's a Minelab Equinox. They produce. Just don't go about it like I did and dying to set up most advanced settings and trying to copy someone's program. Let that metal detector talk to you and you'll create a bond with it and only tweak it when you feel the need to be able to comprehend it better. It's preset modes are incredible and this detector is truly worth every penny.... Thanks for listening guys
Whites quoted on their website that the TDI beach hunter can also be used as a nuggett hunting detector in the gold fields. Was wondering if their was somebody who tried it and what their experience is and what the sensitivity on small gold is?
Found a nice little run a couple of days ago, 2 days in a row just over 1/2 oz each day and another 23 grams this morning.
Here's a pic of this mornings total....
I don't film many digs anymore, but the bigger chunk had a bit of depth. I was hoping it would be deeper and bigger...but alas, not to be, it went just under 10 grams
By Steve Herschbach
Well, thanks to forum member YubaJ I just ended up with a very slightly used White's Sierra Pulse Pro, or as it is more commonly referred to, the White's SPP. Bonus is it came with three coils, the standard 12" round mono, a 6" round mono that was part of an introductory special when they first came out, and a 5" x 9" Miner John folded mono coil.
The Sierra Pulse Pro is nothing more than a White's TDI SL with the Conductivity switch and Pulse Delay knob both removed. The unit is locked into the hottest 10uS pulse delay. It is a limited availability machine only available from west coast dealers and in Australia. The whole story on how it came about is kind of interesting and detailed in my original thread on the machine from May 2014 at http://www.detectorprospector.com/forum/topic/213-whites-sierra-pulse-pro-whites-spp/
Now you may ask, why did I get this detector? There is a story there also. My first detector was a White's Coinmaster IV that I purchased in 1972. My first detector dealership was for White's in 1976, and I have had good success using many of their detectors. I currently have a White's V3i with Bigfoot coil that is my jewelry machine for large parks and sports fields. Bottom line is White's and I go way back.
Whether I intend to use them myself or not I like spreading the word about on new models others might be interested in, so I perked up when the SPP was announced. I was more than anything just excited to see a ground balancing pulse induction machine introduced for under a grand, plus I always liked the ultra light weight of the previous TDI SL model. So I really was kind of pumped up to get one and posted on a few forums about it.
Now, I used to hang out a lot on the White's Electronics forum at http://forums.whiteselectronics.com/ to just offer some free help and support as one of the only people there that seemed to know much about the White's GMT and TDI models. I made a post there identical to the one on this forum at the link above, and I get this message from the moderator:
"Had to remove the Pic and "Sierra" name from the title of your post. The SPP is a Jimmy Sierra product, and as such isn't allowed to be "advertised" or "plugged" on the open forum."
I posted again, something along the lines of "WTF it is made by White's and is sold by White's dealers but because it says "Sierra" in the actual name of the product I am being censored?". I got another message saying my "rant" had been deleted and the issue forwarded to the admin. That was it for me - I banned myself and have not participated there since. Jimmy Sierra later contacted me to apologize and he did set things straight with the people at the forum but water under the bridge by then. Just another example of the strange and convoluted politics at White's Electronics.
I had been all fired up to get the SPP but just put the whole idea aside at that point. Yet down inside I still wanted one. So when by pure chance I saw this SPP for sale at a good price I pounced, purely as an impulse buy. I have no real use for the machine and will probably sell it but I want to play around with it a bit.
The main thing about the White's TDI SL and the SPP is they are crazy light weight. The machine weighs about 3.5 lbs with the 12" coil and right at a perfectly balanced 3 lbs with the smaller coils. This is what the Garrett ATX or Minelab SDC 2300 could have been and should be packaged like. After swinging a GPZ 7000 all summer the SPP feels like a feather!
Now, the TDI SL and SPP models are not high power pulse units and like the Garrett Infinium they really do not do any better in low mineral ground than a good VLF detector. However, as ground mineralization and hot rocks get worse there is a crossover point where the problems these conditions cause on a VLF (loss of depth, false signals) can be overcome by using a ground balancing pulse induction (GBPI) detector. Something many people do not understand is that by adding a ground balancing circuit to a PI some depth is lost in an absolute sense, and this is very easily illustrated with the TDI/SPP models in air tests by just turning the ground balance off. The machine gains quite a bit of extra punch, and a nice thing about the White's GBPI models is they have this ability to be run in pure PI mode in low mineral ground. In particular this makes the original TDI and TDI Pro models some of the best beach PI detectors you can get your hands on.
In the case of the TDI SL and SPP however running the machines with ground balance off is almost the same as running a good VLF in all metal mode. The only difference is you do get the ability inherent in all PI detectors to ignore some ground conditions due to the pulse delay and how it works. See Understanding the PI Metal Detector by Reg Sniff for details.
More about the SPP versus the TDI SL. The SL comes with what White's calls a Dual Field coil, which is basically a small mono running inside a large mono. The coils look like doughnuts, the outer rim being the large coil, and the inner circle being a smaller mono coil, both running at the same time. The theory is the depth of a large coil with the small gold sensitivity of a small coil, all at the same time. The problem was these coils were a bit too hot for Australia, and so the SPP coils are just regular mono coils. Easy to confuse also because a 12" Dual Field looks identical to the regular 12" mono. My unit has both the 12" mono and a 6" round mono that was part of an introductory special (now over). The SPP was a killer deal at introduction with two coils for $999.95. It is now being advertised new with a single 12" coil for $999.95 but is being offered by at least one dealer for $899.95 with the single coil.
I really like the little 5" x 9" folded mono coil and scuff cover that came with my unit. What is a folded mono you ask? Something Reg Sniff came up with, details at Link deleted since Findmall Forum update broke all old links Basically his answer to the White's Dual Field, which was patented. Miner John sells these for $199 at http://razorbackcoils.webs.com/apps/webstore/products/show/6277891 and it is probably one of the best coils you can get for a TDI to hunt gold.
Finally, the SPP is interesting because it really is a TDI SL under the hood. The plug in connections for the Conductivity switch and Pulse Delay control knob are still on the circuit board, and the SPP can be upgraded back into a TDI SL for just a few dollars in parts. Here is a thread on adding the Conductivity switch back in at https://www.prospectingaustralia.com.au/forum/viewtopic.php?id=13934 You can see the little white plastic sockets on the control board picture below marked conductivity and pulse delay.
Anyway, just got this and no time yet to do more than take pictures and post but when I get time more will be forthcoming.