Allodium,Interesting. There are three possibilities.1) It is not needed and can be omitted.2) It is needed and there is a mistake on the circuit. i’m sorryi dont underestand english goodi try speak to you1. can i use instrumentation Amp Amplifier Instead Of UA 2. the piezo is not work3. does any one made complete goldscan IV PI metal detector?is it stable?what about the depth?what about the operating frequency?what about.

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I think judging by the number of interested Aussies on this forum, there are quite a few of us that refuse to pay Minelab’s exhorbitant prices. I’ll buy one – right now! Didn’t older PI’s have GB? New low noise parts replaced older parts such as op-amp, capacitors etc. I had removed the probe and its coil wire, there was a net reduction in weight, the battery pack is only 6. Only the best high specification components are used and the circuits are subjected to three stages of testing plus a burn in period to ensure the performance is stabilised and is consistent between detectors.

Just the addition of the autotune plus updating the preamp and a few other tricks can make the original GS quite a machine even by today’s standards.

The charge is usually zero!!! Only gold in Hawaii is what people loose. May 27, Much iron can be eliminated by judicious use of the DISC. The cells are charged in situ by plugging the charger output jack into the headphone socket. An obvious suggestion perhaps, but with the connection of the above technologies together and then fitted with a Minelab coil connector, we would have the benefits of using Coilteks range of discs Switch over to the Probe to quickly locate a find in a dug hole or to probe between rocks and large stones.


The battery pack can be replaced easily by the user.

I would ground balance to the hot rocks. Hi Steve As far as I know this http: Steve Herschbach Reply Quote. There seem to be few situations where you really need automatic ground balancing in a PI unit, and it usually sacrifices a tad on sensitivity.

Pulse Technology Goldscan 4

I always run my GP Extreme and Infinium in “fixed” mode anyway. Hi Andrew, The Goldscan IV has a manual ground balance circuit, however it cannot be easily adapted to run at the same sensitivity as golldscan Goldquest SS. The GS has variable Pulse Delay.

Despite what many holdscan claim PI units ARE affected by ground conditions, and so ground balancing capability if desirable for best perormance in a gold nugget detector. He has helped untold people worldwide to learn, how to modify and to modify himself and answers untold e-mails. The output indication is both visual on a meter and audible on speaker or phones.

Both boxes are sealed against ingress of water and sand or dust but must not be submerged. For areas with excessive pull tabs and large pieces of silver paper the Foil Reject control can be used to reduce sensitivity to these items. Considering this original design is between 10 and 20 years old, one and only wonder what this PI would have evolved into if it had continued.


For further assistance Contact: Eric, The minute you build a ground balancing version of the Goldquest I will buy one May 11, Can the goldscan IV be optimised to the same degree of sensitivity as the goldquest SS?

Both loop sizes incorporate a double electrostatic shield to eliminate capacitive effects on a wet beach. The shaft consists of a lightweight anodised aluminium armsaver assembly which is adjustable in length by means of a locking telescopic collar. Hi Beach Bum, Right you are Reg is truely one of a kind.

May 21, I finally got smart and ground balance over a hot rock. Eric is truly a rare person in this respect.

I then started finding gold. Just think the new GS5 is even better!!! To Have Salesperson Contact me. Sorry, only registered users may post in this forum. May 26, Hi Goldsczn, I want one to but in a waterproof case. Any suggestions on amalgamating the above units and the ground track circuit would be illuminating!!

The headphones plug into a jack socket on the battery box and a unique sensing circuit cuts out the speaker in the main electronics when the plug is inserted.

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It is not possible to overcharge using the chargers supplied. Please put it in a waterproof case.

Salt water does not affect performance so the Ground CANcelling facility is not required. In clear uncluttered areas the 11 ” coil can be used on the beach to achieve maximum depth performance.