Depar DPR 600 User Guide 11/2016

Hi All,
Today I found this "introduction" of a mini/pocket md on the YT channel of "Sondelsüchtig". 
A "new type of" metaldetectorsensor/coil with a smartphone app/screen.....  Is this the future? Don't know, but I thought some of you might find it interesting to view.
It is in german, but the video "speaks" for itself.  Sondelsüchtig means "addicted to detecting".  And € 399,00 = us$ 448,60. "Handy" is a smartphone.
The YT link to Stephan's/Sondelsüchtig's channel: https://youtu.be/B7XLdSk0guE 
and
 The 2 links to Stephan's/Sondelsüchtig's sponsor/dealer Nuggets24: 
https://nuggets24.de/picosens-MINI-Metalldetektor-MTC-Pocket-Pro-mit-Android-APP-ist-wieder-bei-nuggets24-im-Metalldetektoren-Shop-erhaeltlich
and
https://nuggets24.de/picosens-MTC-Pocket-Pro-Mini-Metalldetektor-Bluetooth-Handy-APP-Steuerung
 
Greetings,
Bob'ke

Also called RF detectors and depth multipliers.  Invented in the 1930's by Gerhard Fisher (founder of Fisher Research Labs, now part of the First Texas conglomerate), this type of detector seems to not have changed much in operating characteristics in 80+ years.  From what I've found there are still three competing models in production:  Fisher's current Gemini-3 model (now 30 years old) https://www.detectorprospector.com/metal-detector-database/fisher-gemini-3-r27/, Garrett's Treasure Hound Eagle Eye Depth Multiplier (quite a mouthful) which is an add-on to their aging GTI 2500 standard style metal detector https://www.detectorprospector.com/metal-detector-database/garrett-gti-2500-r44/ and White's TM808 https://www.detectorprospector.com/metal-detector-database/whites-tm-808-r38/ , a spinoff of a collaboration between White's and Discovery, another Sweet Home, OR company that appears to now be defunct. 
The Fisher unit, operating at 82 kHz, seems to be the most closely aligned survivor of the early design.  Garrett's 'latest' depth multiplier (easily the most expensive at $1300 retail when combined with the GTI 2500) with its 7.2 kHz operating frequency advertises its advantage of being in the VLF range, ignoring ground minerals. White's unit (operating frequency = ?) has ground cancelling controls.  Unlike today's deep PI's and ZVT which can also go deep, these 2 box transmit/receive (T/R) detectors ignore small objects -- an advantage when the sought after target is large and in a trashy area. 
That's a brief overview of the current commercial climate, but what I'd like to know is how much different these three units are when it comes to operating characteristics.  Specifically do the differences in operating frequency and/or ground adjustments translate into better performance under certain conditions?
 

Is a fisher M97 a good metal detector? One was just given to me. I am wanting to get into metal detecting with my grandson. 

Finally a thaw here had a chance to run this detector in the iron at some old sites. Very impressed with the new coil --makes the machine considerably deeper than even the Impact and Kruzer. Superb audio as well--I can really hear everything in the ground--set at disc zero the heavy iron areas become obvious telling me where to buzz around for masked targets. Or I can just jump it up to 4 or 5 to knock the spikes out. With this detector I can hear anything non-ferrous mixed in really well. The 3 Tone mode is also great--it's speeds up the response to bring up even more signals from these worst sections. Never really felt the need for a pinpointer but with the way this machine gets down into the spikes I will need one now. Really liked the overall performance of this detector and will be out there again heading for the worst sections soon as it warms up a bit. cjc

From this post by Tom Dankowski:
“Because there is a lot of good data available (now) on the Tarsacci MDT-8000...……. I am going to lift the restrictions on "seasoned detectorists only". If anyone is interested in the MDT...…. just give me a holler. The cost (including shipping & taxes) is $1539”
Tarsacci MDT-8000 Data & User Reviews