GPX 5000 Mods Video

[Gold Ryder]

Continue to cleanup on old detected ground with the mod. Got it tuned in sweet, hearing those soft deeps.  Pulled the 2.41 at close to 15" today. 

[Zephyr]

Nice work Gold Ryder!
 

What changes have you made since Arizona in your settings that really turned the corner to give this substantially increased performance? 

 

[Gold Ryder]

6 minutes ago, Zephyr said:

Nice work Gold Ryder!
 

What changes have you made since Arizona in your settings that really turned the corner to give this substantially increased performance? 

 

I dropped Micks frequency down from -1 and standard to +3,  stopped trying to run his gain so hot aka 5 oclock and put it in the 3 oclockish zone. And bumped upped the back gain to 6 stabilizer 5.  Switched timing to fine gold and then from slow to very slow on the back. 

[Zephyr]

Right on, what your doing is sure working.

I’ve been running similar settings however on much smaller coils with good luck, but I’m going to have to try your methods of higher frequencies on bigger coils. 

Does your 15” evo run better with the receiver switch in “tiny - speci” when using your latest setup?

[Gold Ryder]

26 minutes ago, Zephyr said:

Right on, what your doing is sure working.

I’ve been running similar settings however on much smaller coils with good luck, but I’m going to have to try your methods of higher frequencies on bigger coils. 

Does your 15” evo run better with the receiver switch in “tiny - speci” when using your latest setup?

No this coil doesnt like speci. It will run in standard but Id just have to manual tune different.  When I get up to the claims with bigger deeper gold. Ill probably run it up at times. 

[Ash]

On 3/8/2025 at 2:51 PM, Tony said:

I'm neither a "yes' or "no" to modded detectors. I still use a stock GP3500 which I'm more than happy with. I can slap on a 20" mono or 6" mono depending on what I'm after. My (educated) choice is to use stock Minelab detectors. I have faith in the Minelab engineers and the $$$ they spend on R&D. The variable GAIN could be useful but not the way you think.....the stock 3500 has a higher GAIN input stage than the detectors that followed it. If anything, I could do with LESS GAIN than what is set within the 3500. I have seen first-hand a modded 4500 v stock 4500. The modded detector detected a test nugget slightly deeper than standard when right over the KNOWN test hole......but all around the test location was a lot of falsing that generated identical "target sounds". I can't see people digging just the true "targets"......and leaving the ground noise behind as it can't be done. A high GAIN that is generating ground noise can't always be remedied by GB. And there's EMI to also add to the mix. Then there's the substantial cost of the mod and the fact that modders need to be very careful when heating to remove and add components. Overheating can degrade component specs quite easily without obvious damage.

So each to their own I guess. The focus of these mods seems to be orientated to smaller and smaller gold which is the path that Minelab is on. I haven't really answered the specific questions but have seen a modded 4500 v standard 4500 (mine) and my decision was an easy one to make. Granted this was some years ago but I'm still staying with stock detectors.

I've recently bought a 3500 and was wondering what your mean

"the stock 3500 has a higher GAIN input stage than the detectors that followed it."

And how you would like it less or lowered.Im not familiar with an adjustable factory gain pot .Do you experience to much depth noise(ground minerals, in Normal Timing??.As I've noticed normal timing can't process the deep ground and a mod gain may be rendered useless at a guess.However on sensitive with a mod gain maybe not so much an issue.Eitherway would like to know your experiences or advice with this great machine,as I've just bought one.