Jump to content

Rick Kempf

  • Content Count

  • Joined

  • Last visited

  • Days Won


Rick Kempf last won the day on August 21 2015

Rick Kempf had the most liked content!

Community Reputation

401 Excellent

About Rick Kempf

  • Rank
    First Forum Member

Profile Information

  • Gender
  • Location:
    Gold Canyon AZ
  • Interests:
    Metal Detectors, wild Mushrooms, Pickleball

Recent Profile Visitors

3,443 profile views
  1. I understood everything in Dave J’s article except for one thing he referred to... What’s a MAGAZINE?
  2. I posted this last month on an old thread in the Metal Detector Advice about the Vallon mine detectors. The consensus was that as nugget hunters they might not be so great. While I have no data on that, I suspect that they might be pretty good except on extreme OZ ground - probably equal to or Better than a TDI. As a beach machine however, they present a really interesting possibility. I have now checked out the 2 I bought on eBay from Poland and they both work fine. Here’s what I posted, followed by a bit of an update....They are a good bit lighter than an ATX - about like a TDI. 3 D cells, but you can use AA to D adapters and lighten that up - the power consumption is quite low and so that works, but get the ones which take 2 AA’s pr adapter so you can use 4 or 5 for longer run time, the machine runs on 3 - 4.5 volts - pretty remarkable engineering for a PI. Blast from the past on this 2 year old thread.  I just ordered two of them from Poland. I took the plunge after tracking the ongoing (67 pages now) thread on Geotec. The thread was started by Eric Foster - noted PI detector designer - and is clearly showing that the Vallon VHM3CS is a very capable and interesting beach and relic machine - and may be useful for native gold as well. http://www.geotech1.com/forums/showthread.php?23169-Vallon-VMH3CS-Mine-Detector - the pics below are from Eric. The top ones shows a transformer box for conventional headset - see below. So, now I have them, I have done some simple functional checks. They detect a nickel buried in a wash here in AZ 13” down - about what a TDI will do. The interesting news is the the Vallon agent in the US will update the software to the latest version - free. If the units are sent postpaid both ways! So $199 on eBay, $67 shipping, and you have a useful non-discriminating beach PI for under $300. They come with the case which is really nice, heavy-duty canvas with shoulder straps and a “one-ear” headset. The headset connector is a milspec item but the wiring diagram is published and the mating plug is $8 surplus online - Piezo phones only unless you build a transformer in the circuit. https://www.ebay.com/itm/Army-metal-detector-VALLON-VMH3CS-Working-condition-BROKEN-ARMREST/282998790673?hash=item41e40ada11%3Ag%3AOqoAAOSwAnhbGTdX&LH_BIN=1
  3. There have been reports where folks claim that the revised software is less deep than the original. Hard to say unless you have data on hand from a few of each version. It is a PI detector and sensitivity to tiny low conductor targets will likely be less than the Nox. Depth, of course is not the reason we use PP’s, it’s sensitivity to find exactly where a target is which has been previously detected - either to avoid a large hole or to find some tiny bit in a pile of excavated dirt.
  4. Price is king. Minelab broke the back of detector pricing with the Nox. How ironic - the folks who had repeatedly pushed the top of the envelope on detector pricing - suddenly push the “bottom” of the envelope. With due regard for ML’s technical talent, they have some folks in marketing who are showing they are no fools. A $6000 detector which finds ounces of gold pays its way in the goldfields and sells very well where there is gold to be found. A $2000 hobbiest detector maybe no longer pays its way in the fields, parks, etc. which most of us hunt in. The Nox makes most other high-end units look limited - multifrequency, waterproof, light enough...a tough act to follow.
  5. Rick Kempf

    Minelab Multi-frequency

    I agree that the recent stuff on multi IQ has been much more informative. But the whole 28 frequency malarkey went on far too long - for decades I think. Of course it started in a time when the “magic” of metal detectors was very much what was selling them to the hopeful, but about the same time Whites was publishing their engineering white papers on their new units. It’s not partisan - just pointing out that folks who want to actually know what is going on - and who recognize the need to protect proprietary information - have historically had a very hard time getting decent technical information on which to base their purchasing decisions.
  6. Rick Kempf

    Minelab Multi-frequency

    Folks focus on the details of the number of frequencies exactly because Minelab has been letting their marketing department write stuff which sounded like technical detail - but wasn’t - . Lots of blame to go around in the metal detector industry, but the confusion didn’t just “happen”. Hopefully public discussion like this will encourage manufacturers to stop telling marketing fairytales and making them sound like technical data.
  7. Rick Kempf

    Relic Hunting With GPX And Equinox

    No doubt that PI offers superior depth in mineralized ground to VLF, even multifreakers. Since Paul Palamo has (he tells me) given up on the forums altogether, I feel OK to share something he wrote to me last month. “As I mentioned earlier, still use top end Pulse Induction for my detecting needs both land and water. Everything else are toys, Inland or fresh water black sand mineralization is tougher than west coast black sand. That’s all I use now the GPX 5000 for relic hunting, and a good pi or Minelab for ocean.“
  8. I belong to a club in Phoenix which was founded in 1970 or 1971, Our meetings draw about 40 members on average. Club hunts about the same or a bit less. I doubt that more than 20% of our members know how many frequencies or what frequencies their detectors use. Likewise I doubt that more than 10% of them replace their machines in any given year. The total market for high end hobbiest detectors is really pretty limited and I seriously doubt that any company can survive selling only to that market. Minelab saw the writing on the wall for multi-thousand dollar pricing for high end machines - anybody who wants to charge significantly more than $1000 for a hobby metal detector has to offer something really special. Right now it is hard to see what that would be for even dedicated hobbiest. Current technology, including simultaneous multifreaker machines, offer nothing totally new in field performance. The Equinox hit the sweet spot - offering general detecting performance along with respectable salt beach and nugget hunting capabilities. That makes it very appealing at the price. I believe that “table stakes” for >$500 detectors now includes water resistance, ability to use wireless phones, and high residence to EMI. >$1000 price levels probably need to add multiple frequencies and respectable salt beach performance - which in turn means likely multi freq at the same time - either simultaneous or sequential. If you want to charge >$1500 you need even more. Advanced technology to make a real change in field performance. I’m thinking of changes like significantly superior unmasking - more than mere adjacent target separation - but actually defeating “silent masking” where a tiny bit of ferrous can mask a deeper nonferrous target. Also looking for greater depth in bad ground without losing ID capability at depth. Salt beach machines have shown no real improvement since the introduction of multifreakers like the CZ, BBS/FBS machines of decades ago. When you consider that Minelab can charge more than $6k for a nugget detector and you consider that a good season at the beach will likely bring in more gold than your average nugget hunter will see in many seasons, there is still a market for >$2000 salt beach machines which offer increased depth, small target sensitivity and usable iron ID - on any beach - including ones which look like this - which kill the depth on all current VLF detectors including current multifreakers.
  9. Rick Kempf

    Black Sand Beach Detecting

    At San Diego a few weeks ago I had my Nox 600 and a PI machine. On a buried nickel in mixed black sand with the Nox I could get 7 - 8 inches with an ID of 3 (on the surface, the ID was 13) The Nox ran OK in Beach 2 on wet sand. The PI got the nickel buried in the same sand at 17”. The PI whined softly when swept across the “bands”, but the targets hit solidly and were easily distinguished from the slight ground noise.
  10. Rick Kempf

    Has Peak Gold Been Seen?

    Mining is huge here in AZ. Saw a bumper sticker a few years ago... EARTH FIRST... WE’LL MINE THE PLANETS LATER
  11. Rick Kempf

    Has Peak Gold Been Seen?

    Peak oil turned out to be a bad call - fracking ended all that talk. There’s plenty of gold - just a question of cost of production vs. price of gold.
  12. Rick Kempf

    Vallon Metal Detectors

    Blast from the past on this 2 year old thread. I just ordered two of them from Poland. I took the plunge after tracking the ongoing (67 pages now) thread on Geotec. The thread was started by Eric Foster - noted PI detector designer - and is clearly showing that the Vallon VHM3CS is a very capable and interesting beach and relic machine - and may be useful for native gold as well. http://www.geotech1.com/forums/showthread.php?23169-Vallon-VMH3CS-Mine-Detector
  13. Rick Kempf

    Can Your Detector Do This?

    In the actual test the ring was laying in a monks the nails and head in fact one nail crossed above it. Then the board with the nails was lifted up a little hole dug in the sand the ring put into the holes and covered it up nail board put back it wasn’t deep an inch or two same result In due course I’m sure a lot of videos showing stuff like this will emerge – but as of now I’ve only seen the one video which I don’t have permission to share
  14. Rick Kempf

    Can Your Detector Do This?

    No “aged nail” tests have been done as far as I know. The same set up has been done with the card on the ground with the nails - and the ring under the card in the sand to a depth of a few inches at least. Further fun will have to await the introduction of a production machine sometime next year (hopefully). then everybody can decide if this a revolution or a parlor trick. Me - I”m saving my money for the “Beach Beast”.