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Jonathan Porter

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Jonathan Porter last won the day on November 7 2017

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About Jonathan Porter

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    Silver Contributor

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  • Gender
    Male
  • Location:
    Clermont, QLD, Australia
  • Gear Used:
    GPZ 7000, SDC 2300, GM 1000, EQX800

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  1. Jonathan Porter

    Summer Detecting

    I can’t complain about not having freedom, technically I retired at 26 when I went out prospecting full time. So its only been the last 3 years that I’ve been tied down to a regular job and even then I try to keep it as fluid as possible, much to my wife’s disgust sometimes. My issue is when I make more money finding gold than I do with all the stupidly long hours in the shop during the winter months, that’s when its hard to come to terms with being locked down. I suppose at the end of the day the shop provides a consistent income stream whereas gold can be a bit sporadic. 4 3/4 ounce slug from last year Speci with over 100 grams found at 3 feet Nice handful of rough gold found at the start of my annual trip away last year
  2. Jonathan Porter

    Summer Detecting

    We’ve dodged the flooding and also a lot of the rain so the farmers are pretty hopeful for more down this way.
  3. Jonathan Porter

    Summer Detecting

    I’ve got my lads home this summer so I’ve been grabbing every chance I can get to drag them out detecting. For me finding some gold is always a good way to get some ready cash for incidental things like beer which both boys now seem to have discovered a taste for.🤣 My attitude is the more I can get them out detecting with them the better because they will soon enough be pursuing their own life directions and if my life at that age is anything to go by no doubt it will be in another town a long way away. So in exchange for beer, a bed, air con, food and the odd bit of cash here and there, oh and don’t forget always running out of data on our internet plan,🤔 I get to occasionally grab one or both lads and go do a bit of father son detecting. Yesterday was a lot of fun, the weather has returned to hot and muggy again (typical February weather in Central QLD) so an early start was necessary. This time we decided to target an area not far from a high voltage power line, not because we love the constant discordant threshold (The GPZ is heaps better than any of gold machine in this regard), but because the gold tends to be chunkier thanks to the area not having been detected as often due to the interference. The keys to detecting here are to find a clear frequency for the location, this is changed pretty regularly as the frequency of the line changes often too, I also find lowering the sensitivity helps a lot and also backing off the B&Z booster a bit to take the edge off the variation. There is also a fair amount of trash so we tend to just focus on signals that sound a bit buried. I was lucky and pinged a deep 1 gram bit only 30 minutes into the session, I held off letting Tim know because its better in a nasty area like this to keep things low key and not too competitive. Being hot and sweaty as well as listening to an annoying unstable threshold is bad enough without feeling pressured from Dad. Anyway this session was kinder to me and I managed to ping quite a few chunky bits poking my coil here and there amongst the old boys diggings on the edges of the drainage. Poor Tim was struggling he had pockets full of lead and trash but no gold, so I suggested he head on over to were I pinged the first bit. Right on knock off time I saw Tim grinning triumphantly and he then refusing to finish off for the day until he had covered the area more thoroughly. Long story short, Tim got the biggest nugget for the session sitting right at 1.6 grams with a grand total of 7.4 grams between us. Seeing how were are partners we spilt the gold with 3.7 grams each or $214 AU for a few hours work, no wonder he likes coming home for a visit.😎😂 JP Some pics of yesterdays session and a few from another one last week. The gold is just a bonus, the true gold is the time spent with my boy.
  4. Jonathan Porter

    Chris Gholson Detects Arizona

    I think the videos great and could care less what detector he was swinging or what coil was attached. I’m also pleased to see Chris is still making the effort to do these sorts of things, I ran out of steam ages ago thanks to continuous negative comments. It takes huge effort to rig up cameras and get video. When your a shop owner the opportunity to get out prospecting is VERY limited, for Chris to take time out of his precious detecting time to generate content to share with others shows a lot of dedication and good luck to him if it generates some interest in his business. There aren’t that many dealers out there who walk the walk, so kudos to him. JP
  5. Jonathan Porter

    Emergency Jump Starter / Charging System

    I carry one around on my quad at all times, its saved me at least once when the quad gel cell battery was on the way out. I’ve also used it to top up my phone in fringe areas where the phone battery dies really quickly and a couple of times have used the torch on it when I was out after dark. JP
  6. Jonathan Porter

    2019 - A Look Ahead

    Well my first cup of coffee for 2019 is starting to kick in, so happy new year everyone which ever side of the Calendar you reside. I’ve no set goals for 2019, more of the same I suppose which is to get out detecting as often as possible (mainly weather or the shop permitting). I will say this however, I am dissolutioned by the direction social media is taking public discussions. Yes it’s convenient and instantaneous and 24/7 but it is so hard to error check because of the politic. If your in possesion of ‘facts’ those facts can be dissolved simply by being politically blocked with no recourse to correction, or worse within hours of the discussion those facts are ‘old news’ and everyone has moved onto the next ‘fake news’ item. It’s a brilliant platform for selling gear and promoting product or promoting self quickly and cheaply, but from a factual archival point of view it’s horrendous, a Wikipedia nightmare gone rouge. So here’s my New Years resolution now that I’ve read Steve’s intentions, I Intend to try and follows Steve’s example and attend this forum more often because archivally this forum is one of the last bastions of a world slowly dissolving itself into an imbalanced individualistically overmoderated soup bowl. Social media has its place and will no doubt be the in-thing for a long time to come, but information packed ‘fact environments’ like the DP forum are dying a slow death of which we all run the risk of losing if we don’t make the effort to contribute. JP
  7. Jonathan Porter

    A Tiny Bit With My New Steelphase

    I'd be very interested to read how the sP booster manages to magically do that? No offence Pat but this kind of rhetoric seems more akin to devining with a forky stick than amplified audio. Folks because I make a competing product I've kept away from this type of discussion, at the end of the day they are all audio amplifiers. A good one increases the loudness of the audio with minimal distortion and clipping giving the user a finer resolution of control via the volume pot. The volume control on the Minelab units are very coarse, once you get above certain point they clip, a good booster helps a lot to avoid this. I have a sP booster and it has a nice mellow sound but is heavily filtered, I've used it with headphones and speakers and preferred it for headphone use. I'm not a fan of the aluminium box because the GPZ can smack it at a great distance, but all in all it's a really nice booster. Steve I know this post is a little inflammatory but felt it needed to be said, especially on here. JP
  8. Jonathan Porter

    Recent Find With GPZ 19 Coil

    Found this past weekend with the GPZ 19 coil at 2 measured feet. JP 20 grams
  9. Jonathan Porter

    Another Question About The Ferrite Ring

    Ferrite balancing is a "Calibration", the detector could care less where it gets its "X" excitation from but IMO using the supplied Ferrite is more accurate than having a random potentially inaccurate reading from the ground. The Ferrite "Calibration" will remain constant if the localised detecting conditions remain the same relative to ambient temperature and the temperature of the electronics, it has nothing to do with the ground except for aquiring an X balance either through having no Ferrite or if the X signal in the ground is different to the Calibration setting potentially causing spurious signals. If there is no X signal in the ground your working then the calibration of the detector is not so important, however there can be a lot of X signal in ground with minimal mineralsation so it is hard to tell by eye when it is present or not. Best bet in my opinion is to always "Calibrate" the detector with the Ferrite, use in Semi-Auto mode and check the Ferrite periodically, especially if Ambient temps fluctuate a lot. Hope this helps JP
  10. Jonathan Porter

    GPZ 7000 Auto, Semi Auto, Manual ???

    The Ferrite is needed to accurately calibrate the detector, the ground holds varying degrees of Ferrite like signals called X. In Auto mode the detector will slowly measure any X component in the ground but can be adversely affected by Salt and Saturation signals. If there is no Ferrite available then the detector can be used in Auto mode and hopefully the ground conditions will allow for a reasonable X measurement. When Quick-Trak is triggered the X balance and G balance track really quickly then throttle back to their respective speeds, in the case of Auto mode the X balance is really slow with an active G balance when Quick-Trak is released. In Semi Auto mode the X balance is FIXED once the Quick-Trak button is released. If you do not have a Ferrite then with Quick-Trak engaged used the "Walk and Detect" method shown in the Minelab YouTube tutorials. Ideally it is better to use the Ferrite at all times using Quick-Trak in Auto, Semi Auto or Manual mode. Using the Ferrite is far more accurate than solely relying on there being enough X signal in the ground. Hope this helps JP
  11. Jonathan Porter

    GPZ 7000 Auto, Semi Auto, Manual ???

    Combination of orientation and balancing it out. Fix the GB to Manual mode before committing to dig. Use the Semi Auto mode during detecting to keep the GB simple. Make sure the Audio Smoothing is OFF!! Lower the Sensitivity and Volume to suitable levels when using Audio Smoothing OFF, threshold needs to be 27 at this level. Hope this helps JP
  12. Jonathan Porter

    GPZ 7000 Auto, Semi Auto, Manual ???

    Couple of things that need to be thought about with any auto GB but more so with the GPZ. An edge of detection target will present itself to the detectors electronics as potential ground noise so the Auto GB is going to mess with it somewhat, this is why I always move away from a potential signal response onto clean ground, center the GB under the coil, and then get the GB averaged again by carefully sweeping before moving slowly back in over the target zone. In the case of the GPZ and why you should use Semi-Auto GB over Manual (I'll discuss the differences between Auto and Semi-auto below), the GPZ has a dual receive coil design (super D or DOD as some like to call it), this coil design is difficult to make because the two receive windings have to be kept in phase, you the operator can easily throw the coil out of phase through poor coil control. Out of Phase means that one receive winding is generating a different response compared to the other. If you are working variable ground where the GB is very active the interchange between different GB scenarios can cause a tonal break in the threshold as one winding passes into the new GB scenario while the other receive winding is still in the old scenario, this interchange is heralded by a target like signal response which usually the Semi-Auto GB quickly deals with. If you are using anything less the Audio Smoothing OFF then you will generally not hear these small interchange responses as the filtering masks them along with faint edge of detection tonal target responses. If you use Manual GB those interchanges will sound very target like forcing the operator to either check them out or if the ground is really variable ignore them through attrition! Either way your technically blind while the interchange signal is in effect, using Manual the interchange response is much more aggressive and longer in duration forcing a compromised on what targets are investigated, effectively leaving quite a large amount of undetected ground. A thing to note, quite a lot of nugget signals are nested in those interchanges of mineralisation. The nugget in the FB video sounded like a broad very faint variable tonal response but experience has taught me to check these types of signals out, because I was originally in Semi-Auto GB the target response between the High/Low Low/High channels was interfering with the response, this caused the Lead In and Tail Out of the target to be extremely wide as the two channels fought each other, especially on the Tail Out (the only way I can describe this type of signal response effect is when two magnets are moved near each other with like poles, they repel each other). Setting the GB to Manual on similar ground nearby brought the target response more into the Low/High range focus allowing me to centralize the response and confirm it was indeed an edge of detection target. In this case the target turned into a deep 6 gram slug. 6 gram Nugget Dig Differences between Auto & Semi-Auto: Auto GB on the GPZ 7000 is doing 2 things at once, it is actively tracking the ground and at the same time is very slowly tracking any Ferrite like signals in the ground. Semi-Auto is only actively tracking the ground with the Ferrite balance being fixed. I do not like to use Auto in the majority of ground types in Australia as we have a lot of ground conditions that interfere with the active Ferrite balance, one is Salt and the other is Saturation. If you follow the normal Ferrite balance procedure in Auto mode and then encounter salty or saturable ground the Ferrite balance will drift away from optimum allowing Ferrite signals into the signal response (assuming there are Ferrite like signals there). These signals add to the threshold and ground noise potentially masking targets or in a worse case scenario sound like target signals that disappear. Semi Auto locks the Ferrite balance, so when you use the Quick-Trak button over the Ferrite the detector is actively looking for Ferrite like signals and trying to track them out (triggering the Quick Track button in any GB mode does this), when you release the button the detector locks the Ferrite balance so the only way any Ferrite like noise can get into the signal train is either through temperature changes or not having preformed a good Ferrite Balance in the first place. Hope this helps JP
  13. Ash I've deliberately avoided this thread because of it being contentious and yet my name got dragged into the discussion anyway. Not really sure where your angling with your comments but I will now give my opinion so there can be no confusion on where I stand on the subject of mods. The SD 2000 benefited from two mods, one was an increase in battery voltage which helped increase somewhat the coil field strength and the other was a crystal change which improved the sensitivity to small targets. The crystal mod was not so useful on the SD2100, but both the SD2100 and SD2200D did get some benefit from running a higher voltage. The higher voltages on the SD units did improve target response however they also increased ground noise so then forced operators to use DD coils in variable ground which then had a corresponding reduction in depth compared to a Monoloop. Battery voltage increases on GP and GPX machines is no advantage due to the dual voltage technology, in essence the voltages of DVT are adjusted internally regardless of the input voltage however there is some evidence the audio is "brightened" by running a higher voltage on the GP series (highly speculative, and only really noticeable if the Minelab battery is low on charge). I am unfamiliar with the current mods other than experience with customers in our shop and Minelab's stance on modded units when it comes to repair work etc. If a detector comes into Minelab with mods the repair center just closes up the unit and returns it to the sender. Last year I had a customer who I've known for many years come into our shop to say Hi and talk gold, in the discussion he very enthusiastically told me about his modded GPX 4500 and how he felt it could beat a GPZ 7000 on all target sizes which was supposedly demonstrated to him on a test bed in Victoria, we had an interesting discussion where I put forward my case on mods and the differences in the different technologies etc (I had to do this very tactfully because he is a friend and a customer so I did not want to offend). This was not a heated debate, he is also not broke so could in this case afford to take the risk if the unit failed etc. Two days later he came back into the shop and bought a brand new GPX 4500, his modded unit although brilliant in his opinion on the test bed where he had seen it perform on known targets was next to useless in the real world where you don't know if a target is actually present or not. This is the sum total of my experiences with modified Minelab metal detectors, I have expressed my opinion in the past to try and put balance to discussions to help inform people like my friend above, especially those who cannot afford to have a detector become unusable, in almost all cases the discussions became personal to the extreme with suggestions about my Minelab bias etc. These days I just can't be bothered getting into all the debates. I won't be responding further on this discussion. JP
  14. Jonathan Porter

    Equinox Acting Crazy

    As mentioned I would try the frequency option, in Prospect mode there's only two, 20kHz and 40kHz. Also go into the GB mode and check to make sure the Ground Balance is accurate, best way to confirm is to have the GB in Auto then hold in accept reject then when you hear the little peep sound wave the coil side to side not up and down. If there is salt present pumping the coil will cause bad GB numbers which will make the detector extremely noisy to use, a side to side GB method makes sure the ground balance is correct for the ground and not trying to set itself to the salt signal. It is possible to have areas with low mineralisation that have high salt signals. Also the recovery mode is tied in with salt as well, the higher the recovery the greater the rejection of salt, lower numbers bring the salt signal in much stronger, in my areas with low mineralisation (can run the sensitivity on 20) where salt has been a problem I've found a recovery speed of 4 to be ideal. Hope this helps JP
  15. Jonathan Porter

    General Vs High Yield

    All the Gold Modes behave differently to each other on targets, this is due to the 2 channels having cross over points where the target response is a blend of High/Low and Low/High all at the same time. This "confused" type signal can make the audio sound muted compared to a dedicated one way signal in another mode, tricking the operator into thinking the target was louder in one mode over another. This is why it pays to go over patches in a range of modes to allow for each mode to respond best on any targets that were not so obvious in the mode used previously. The GPZ has a larger "range" of information available compared to previous PI machines, call it resolution if you like, which means each and every target is more individual in the way ZVT responds. JP
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