can you give me the detail please of the PI detectors you us ? names, info, prices !!!!
For deep seeking needs i am using the DBP2010 PI detector most of the time. It's an old analog design somwhere from the year 2000, considered as a clasic PI deep seeker, followed by many other designes you can find on the net, but none, in my oppinion, ever surpassed it in its range, stability and overall performance. The adjustable commands are pulse power, sensitivity, frequency of pulses, sampling delay and sampling window - width. I use large coil 1 x 1.2m with 4m max. depth reporting helmet size object at 2-3m, and a small oval coil 30x38cm, heaving max. at 2m and reporting 10cm diameter target at 1m. The depts are as stated in sand or dry soil, wet heavy soil takes 0,5m up to 1m in realy bad conditions off the large coil performance, and up to 0,5m from small one, but usually only 10-20cm.
The other thing with this detector is you will hardly be able to buy it, it is a DIY detector, no problem if you know basics of electronics, or else you'll need someone else to build it for you.
All the electronic parts may cost somwhere between 200-300 EUR, battery and box incl.
I can supply schematisc, documentation, PCB template and all the on-line help. I do have eached and tinned PCB for it, but i do not know where, i prommise i will look for it, but i can't promise i will find it, if you decide to take this way.
In the price range of 200 EUR you may find assembled prefabricated PI detector kit - motherboard - in the net under names such as xr71, Crazy Pulse etc.... This is an reincarnation claimed to be even deeper, but the "improvement" makes the machine unstabile if pushed to its max., thous beeing pretty much the same performer as the 2010. You will have to build the coil and tune it with the circuit by yourselfe, if you opt fot that. You may find other PIs on the same web page offering discrim. and digital processing - don't go for it, stay with the clasic if you want depth!
You can find other similar performers (though different designs) under the names Deep Pulse AR III (i don't like this one), Pulse Star II - good one, Delta pulse.... Some of them can be purchased new, with different coils - you will need 1m x 1m at least, prices are from 1000 EUR and more. In my oppinion they are not worth it. I would opt for a second hand one and i wouldn't pay much more than 400 EUR for a fully functional unit. In all abowe machines you may expect 5m max, if lucky.
There is another type of deep seeking detectors but PI - dual box machines, i will not bother with tech bacground, i will name only pros and cons. They use two quite small coils rather than large cumberson one, they need only a fraction of energy the PIs does to go as deep as 5m somethimes even more, they ignore small items and are cut out for targets larget than say a beer can. The con boiles down to one word: EMI. If there is no inhabited house closer than 50m, no power line closer than 300m and no power transformer closer than 500m, than yes, you can cosider one of these. I've seen two commecial ones still in production, one was VLF/two box convertible from a big name producer makeing awsome good VLFs i will not mention explicit. It's performance was bogus. The other was White's TM-800 - or something like that. Nice black box with two coils. In my oppinion very underdevelopped but still OK machine for a hoby sikeer. Once mechanical parts ware fixed and remade to be stiff enought to prevent coils from dancing on its own, some fairly good results ware demonstrated. Price- i thing around 1000EUR. The modern military equipment hovewer, is totaly at another level compared to previous two detectors, i don't know, however, if the price is at that level too. Type MG-1 metal detector in youtube.
And the last option i certanly encourage, if this is the only place you want to sweep, try to get someone with proper machine and expirience to do it for you, or if you can't trust, try to borrow one in a naighbourhood.
Hope i was of some help.
