Deep settings gpx 4500

Gday

Now that the gpx 4500 has been out in the field for awhile has anybody found what they believe to be the best settings used to maximise its depth capability, as a newby to the 4500 I am yet to fully understand the mind boggling array of setting available on the thing.

Its quite a step up from the gp to the gpx series detectors, and I think that the more information you can get the better, as I would much prefer to know the do's and dont's, especially the settings that should be avoided!

cheers

stayyerAU

Hey there stayyerAU,
I'm not sure where you are located but I think the GPX-4500 comes with a one-day-lesson these days.
Those in NSW buying one can obtain their lesson at Hill End. One chap quite recently found a 1.5 ouncer on his first day and I believe it might have been during his actual lesson (LOL!). Of those who have been to the training day, ten users reported that they found gold on their first day.

The manual is VERY useful so be sure to read through the settings. Start off in Factory Preset and set your detector up for the sort of hunting you intend to pursue. If you find something, switch to the "patch" setting so you can explore the region more carefully. There's a slew of new setting on the 4500 that make it easy to use if you are new. Don't make the mistake many others make by turning the sensitivity right up to try to get more depth at the cost of stability. Check out the chapter on Tracking Speed (page 76) of your manual which is fairly important.

Your biggest puzzle ought to be which coil to use. The coil that the GPX-4500 ships with here in Australia is an 11" Double D Commander Coil which means you can use it on hot soils and it has fairly effective discrimination for iron (unless the iron is deep). This is a VERY good multi purpose coil that is useful in so many conditions and soil types. It's also very sensitive to smaller gold. It can be switched to what people here are referring to as a "pseudo monoloop coil" which means that with the flick of a switch, the coil acts as a mono loop coil (in this case the left hand side becomes active as a partial-monoloop). But it's considered to be the perfect coil for most users. Those exploring salt lakes and Western Australian flat-lands will do well with a larger coil that is ideal for extra deep targets on flat surfaces.

But to get more depth (which everyone wants), you will need to look at an additional coil. The settings on the detector will stabilize the coils and make the unit run smoother (including the Monoloops which were noisier on other models) but more performance will require the use of an additional coil at some stage. The larger coils will give you more depth than the default 11" coil. Previously, a monoloop used to get a lot of noise but the new detectors now manage to quiet them down on mineralized soils so that they're a pleasure to use. Whilst you can't discriminate the same way with a monoloop as you can with a Double D, you'll get noticeably deeper ground penetration with a monoloop than using a similar sized Double D. That's why they're so popular with nugget hunters.

The things to watch for (the DON'T list) are as follows:
* ALWAYS turn the unit off before disconnecting or re-connecting any coils.
* Don't EVER bother turning the unit on inside a building. The GPX-4500 is (like the GPX-4000 & GPs') far too sensitive to be used near electrical power cables, florescent lights or similar interference.
* The stock coil is not waterproof but it can handle light rain. Don't immerse the coil in a creek as the added pressure could cause water to be forced past the seals.
* Don't leave the unit in your car if on a hot day.
* Never leave your detector (or operating manual) visible in your vehicle. Wearing club stickers (if you are in a detecting group) will attract thieves. Likewise, don't leave Prospecting-related maps in plain view in your car when you are detecting.


Cheers,

Marco

Deep settings for the GPX 4500 with a Mono coil.

Motion mode SLOW
Gain 8 (Gain can be increased if conditions allow up to 12)
Stabilizer 8
Timings ENHANCE
Signal 19
GB FIXED
Coil RX DD or MONO
Search Mode GENERAL (I recommend General because the FP's best represent the previous GP range for benchmark purposes)
Target Volume FP for Headphone use, less for speaker
Volume Limit 12 for inbuilt booster with correctly wired speaker or 8 with a B&Z booster or equivalent
Threshold 1 to 2 O'clock
Back light OFF (helps with signal response crispness)

When ground balancing in Enhance timings keep the coil as parallel to the ground as possible, move the coil in small movements (not much more the 30 mm) then hold the coil perfectly still before releasing the Quick Trak button. Do not sweep the coil too fast in these timings, they are or can be very swing dependant, even though the machine sounds very quiet a steady swing speed (DD coil users will adapt to this method very well) is paramount for best depth and sensitivity. Keep an ear out for slight repeatable variations in response as these can more often than herald deep nuggets.

Hope this helps

JP

PS for outright depth with the GPX platform Normal timings are preferred, this will give equivalent performance to a 3500 with the added advantage of adjustability on things like Gain, Stabilizer, Motion etc
PPS I have 2 x training DVDs (2 x 2 disc sets) on the GPX range which go into great depths on how to get the best out of the detectors.

Gday Marco and JP

Thanks for the feedback, Jp would those settings be more suitable for the Eastern states golfields or Wa goldfields? or good for any type of conditions?

Thanks

stayyerAU

Those settings can be used anywhere mineralisation is a problem.

JP

hi to all
i just want to know, how can i make the Iron reject ''on'' instead of ''off''

Morning Nurnur,
The last option on the digital read out is "Iron Reject", scroll down to this position then using the right hand "Settings" switch rotate to the level of rejection you want.

Peter

hi stayer normal timings are the deepest settings you can get on the 4500, with a larger coil but you have to adjust your gain etc too get it to run some where near smooth. jp is on the money enhance good momo coil get the 45 to run smooth and listen for those nice sweet sounds and balance a far bit to keep the45 in seek with the ground you are on . good hunting you will luv it real quick