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Hi guys new to the forum from down under. I can see there is a wealth of info on here and looking forward to taking it all in. I recently hired a Gpz7000 and its an amazing machine however out of my budget (for now). While on that trip I was having major problems keep the machine quite. So I was advise of looking up Lunks settings for the Z. WOW this turn the trip around and picked up half a dozen bits of yella. However I have now come into GPX4500 and I am wondering if there are Lunks settings similar to that for the 4500. I have had a search but cant see anything as yet. Hoping someone can point me in the right direction. Thanks MATE!!!!

Editors Note: This topic was split from the following thread - http://www.detectorprospector.com/forum/topic/3923-semi-auto-gpz-ground-balance/ I believe there is a lot of reasons of trying to turn GPX into a GPZ. They wont be never the same thing since they are in different technology . But anyone would like to walk around with an more affordable machine that could pack a punch of the " GREATEST". Im someone who started metal detecting and someday looking to upgrade to a heavier and more powerful machine. So after reading the pro and cons of each one i would pick a GPX over GPZ even if i found a Pound of Gold. -Lightest machine? GPX wins even with a larger coil. -Coils price and more coil options? GPX takes that. -immune to the hottest of ground? GPX i guess wins this since is a PI. Dont know where that ground exist but i know is out there. Okay so i have seen running a GPX with one of the newer coils could match the performace on depth on sub-gram nuggets and up. Now the GPZ would clearly stand out on tiny, spongy and specimen gold. But wouldnt you have enough money left to even buy a SDC 2300? I just dont see the reason of boasting a machine for ability to pick up super tiny gold when you need to pay so much for it. That headline for me fits more a GM1000 since its a way less expensive machine.

Sorry about the title, I couldn't help myself with all the monster talk . This video is a bit of detector vs big coil comparison on a decent sized bit of trash (unfortunately).

I had my first experience with caliche recently...I was wondering if anyone has advice on which coils work well on caliche covered nuggets. I plan to buy a 9x14 evolution soon, but don't know if that will be better in this regard. I was swinging an advantage 12" RM and managed to get one, but thought there could have been some I may not have heard. I use a goldscreamer and it blasts on the tiniest of targets so I think there may be something special about nuggets with caliche. Any experience you can share is appreciated.

Post any tips when switching coils or "going from mild to hot ground "or" Big coil 18 plus size" detector settings that need switching? Or any thing else" that comes to mind?When operating the Minelab Gpx-4500/5000's... The Guy's w/ the Zed's are the 1%.and deserve a $10g machine! I watched some "Aussies" $$$Payoff their Zedz in 90days! upon it first debut ..Im sure there's a "Bunch" of newbies' like"Me" out there/on here...that got into p/i/ during the last 24months. Because we could finally $$$ afford to! And at $2600 for a gpx45! Thanks Minelab and Rob'sDetector's! I "appreciate" all posts/responses I've Read thruout the "forum" archived&current and take heart of "Everything" I can on these Great Machines! And Feel Blessed" to be Carrying one! Just like my "Mates Down Under" Thanks! Cheers, Ig Hot Ground Balance below;

Just recently we were detecting (all experienced detectorist) in the grasslands of California, with two GPZ's, one had the stock 14" coil and the other had the 19" coil and two GPX's one had the 17x13 Evo and the other had the Minelab 12x15. Towards the end of the day, we decided to perform a test. We buried about a 9mm slug 14" deep. I went over the target with my GPZ, HY, Normal, Sen 15, Smoothing Off, and barely heard the target. Same settings with the 19" but much better results. Heard the target about three inches above the ground. Next, the GPX with the Evo coil in Sharp, General, don't remember the gain but a smooth threshold with the gold screamer, and no signal. The next detector is the one that is really giving me heart burn, the GPX with the 12x15 commander in Sensitive Extra, General, don't remember the gain but a smooth threshold with the stock battery. It gave an obvious signal about 5 inches above the ground. I could not believe how loud of a target response this stock GPX gave. After hearing the results from the GPX, I increased my Sensitiviy to 20, but there was too much ground noise to hear a target. I also tried different ground and gold modes with the GPZ, but nothing compared to that GPX. I wish we had more time to really investigate, but we were all tired, and the sun had already set behind the mountain. Is this just one of those scenarios that we must except and move on, or is there some credibility here??? Has anyone done similar tests or can give some suggestions? Still scratching my head, Brian.

when useing a DD coil on GPX 4500 do i need to flip toggle to DD?

Hi all, I'm ready to buy my first detector and have narrowed the choice down to two. Mainly based on price but some advice could help point me in the right direction. My choices are the GPX 4500 & SDC 2300, within $100 of each other. Most of my hunting will be in the Golden Triangle of central Victoria, Australia. The GPX seems to be more versatile but the SDC appears to be easier to master. It appears both will find gold in the right hands so I suppose my quandary revolves around which one will give me the broadest chance to find gold in quantity and size. Cheers in advance, Benny.

I have a ML GPX 4500 and want to buy a control box cover that has a battery pocket. So, I need a shorter power cord...any idea where to get one (and ensure it meets specs)?? And, any suggestions on the best headphones? ...Killer Bee Wasp?

As a total newbie, the more I read the more confused I become. I was leaning towards a 2300 as a first machine to use when I move back to AZ. But I was looking at the 4500 and 5000 as the price where I am are all within 100 bucks of each other. Makes for a tough choice........BUT then I keep reading about the GPZ and the size and depth increases it affords and I think that is the machine I will ultimately want anyway. I am new to the detecting(read zero experience since the 80's), but not to prospecting. Would I be getting over my head going straight to the GPZ? I am not talking about the price as much as I want to know if as a first piece of equipment is it too much? Do I need to work my way up the ranks before I get the big dog? I do not want to buy and then sell a 2300 or a 5000 or both only to arrive at the 7000 as an end game machine anyway. So if I bite the bullet and skip the retirement watch..... I defer to the experts.