Awesome video. I was wondering what was hiding inside these newer minelab coils. As soon as you finalize all the mods that can be done to the gold monster and its coils, I'm all ready for the revamp!. Thank you again Woody!
I agree, a fine toothed hole saw, with a pre drilled center hole. Since it's already taken apart, measure the distance between the post for people in the future to use.
did you check the continuity on the rectangular rubber pieces? they are suspiciously shiny in graphite kind of way. great tear down... amazed they are amping and digitising on the coil end...must be some advantage. oh and get some quercetin for the crap the kids bring home from school coff coff
Have you ever done a 7000 coil , I had issues with one and sent it to ML to be checked out of warranty, they believed it was ok, pinged on any bump. They don’t repair coils, so pulled it apart, they used plastic screws to hold the internals together which had rattled loose and the shielding was was worn from rubbing on the base plate. I don’t know why the nuts aren’t Locked with glue. Particularly when where ever you go prospecting you’ve got corrugation
@@DetectorMods clearly after sending it from wa to sa I don’t know what testing they do but at the time it was 6 months out of warranty and was always a noisy coil found gold, but ended buying another machine which is quieter, put the new coil on the the old machine and no probs, but minelab testing believed it’s ok . Pulled it apart all had rattled apart, and can’t understand why they can’t repair or bother to repair their own coils.
thanks for the post, I have 10 inch coil for the same detector one of the cable wire got loose inside the coil so I disassemble it and noticed the preamplifier and moderator for both Tx and Rx , the question is that I have universal 15 inch double D coil with decent inductance can be used with preamplifier and connect to goldmonster ,
@@DetectorModsthanks for motivating me to go ahead , I will start preparing the experiment after calculating the inductance and resistance of both coils with to put it on mind and record the output on the bench and field test
Could a Gold Monster benefit from a Bigger coil like a 20 inch for deeper big stuff? I'm not aware of any just curious if it could be a thing. I just scored an almost new GM.
Question.... Do you have a grid dip meter ? From what you have shown, I would say that the two black D's are used as inductors ! Kinda like ferrite rod antenna's used in AM broadcast receiver's, except that it uses conductive plastic instead of ceramic material ! So if you have a dip meter or a VNA you could see what the Q and frequency range is. If the plastic is used as a shield or choke it would be great to see if it is being switched or biased. Also, some devices on the PC board are most likely used as a TR switch ! Do see any pin diodes ? I will have to search for someone that has a dead coil they would like to sell. Thanks for sharing this !
The Gold Monster Tx coil is closer to the ground than the Rx coil. You sounded surprised to learn that the Rx coil wasn’t the coil closest to the ground. From my testing, swiping artifacts in front of the coil, I think that the Manticore Double-D coil receiver coil is near the ground and the Tx coil is raised above the Rx coil. Do you think it's worth exploring reversing the Tx/Rx coils of the Gold Monster? People complain about one way-hits. Maybe it’s inherent in the design of the Double-D coil, with specific artifact orientation masking scenarios? I measure 0.20” inch coil gap on the Manticore. It would make for an interesting demo if moving the artifact by 0.20” demonstrates a break point for one way-hits. But I'm not able to do that simply by sweeping an artifact past the raised coil. I think something else is at play. Where the Gold Monster coils overlaps you pointed out the wedge shaped profile on the perimeter of the coils. You surmised that maybe they were originally designed to glued together, placing the coils on the same plane. But Minelab chose to otherwise. What might be a justification to glue them together on the same plane? Tks! GL👨🦯HH
@@DetectorMods If Minelab originally intended to locate the Rx coil on the bottom, there might be a design features that would allow it to be located on the bottom. Less both coils are manufactured exactly the same. In that case you wouldn't be able to tell. Of if the original mold has been replaced. If Minelab originally intended to glue the faces of the coils together, there might be a key to align the coils. Less the coils need to be adjusted for optimization. Tks! GL👨🦯HH
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Awesome video. I was wondering what was hiding inside these newer minelab coils. As soon as you finalize all the mods that can be done to the gold monster and its coils, I'm all ready for the revamp!. Thank you again Woody!
More to come!
You could possibly isolate the plastic mounts by using a small hole saw, just use a smaller drill bit to center it.
Anything is posible.
I agree, a fine toothed hole saw, with a pre drilled center hole.
Since it's already taken apart, measure the distance between the post for people in the future to use.
Thank you
You’re welcome.
did you check the continuity on the rectangular rubber pieces? they are suspiciously shiny in graphite kind of way. great tear down... amazed they are amping and digitising on the coil end...must be some advantage.
oh and get some quercetin for the crap the kids bring home from school coff coff
The mounts are non conductive.
Have you ever done a 7000 coil , I had issues with one and sent it to ML to be checked out of warranty, they believed it was ok, pinged on any bump. They don’t repair coils, so pulled it apart, they used plastic screws to hold the internals together which had rattled loose and the shielding was was worn from rubbing on the base plate. I don’t know why the nuts aren’t Locked with glue. Particularly when where ever you go prospecting you’ve got corrugation
Years ago, their international sales manager stated after i asked why the coils were poo, we sell metal detectors…not coils.
@@DetectorMods clearly after sending it from wa to sa I don’t know what testing they do but at the time it was 6 months out of warranty and was always a noisy coil found gold, but ended buying another machine which is quieter, put the new coil on the the old machine and no probs, but minelab testing believed it’s ok .
Pulled it apart all had rattled apart, and can’t understand why they can’t repair or bother to repair their own coils.
And also makes sense of your reply, as I was told by the dealer it was a disposable part and they don’t repair them
very nice ❤❤
thanks for the post, I have 10 inch coil for the same detector one of the cable wire got loose inside the coil so I disassemble it and noticed the preamplifier and moderator for both Tx and Rx , the question is that I have universal 15 inch double D coil with decent inductance can be used with preamplifier and connect to goldmonster ,
There is nothing stopping experimenting with larger coils, maybe the inductance of the tx and rx coils should be taken into account.
@@DetectorModsthanks for motivating me to go ahead , I will start preparing the experiment after calculating the inductance and resistance of both coils with to put it on mind and record the output on the bench and field test
plz vlf fbs etrac or safari or explorer power board repire
Could a Gold Monster benefit from a Bigger coil like a 20 inch for deeper big stuff? I'm not aware of any just curious if it could be a thing. I just scored an almost new GM.
That would be a step backwards.
Roger that, thank you!
Thanks Woody.
-Is the shielding wire touching the tx or rx coil please?
-Is it enough to touch only part of the coil?
The wire is common to both coil shells.
Question.... Do you have a grid dip meter ? From what you have shown, I would say that the two black D's are used as inductors ! Kinda like ferrite rod antenna's used in AM
broadcast receiver's, except that it uses conductive plastic instead of ceramic material ! So if you have a dip meter or a VNA you could see what the Q and frequency range is. If the plastic is used as a shield or choke it would be great to see if it is being switched or biased. Also, some devices on the PC board are most likely used as a TR switch ! Do see any pin diodes ? I will have to search for someone that has a dead coil they would like to sell. Thanks for sharing this !
The last time I used a GDO was 40 years ago.
I have mine dissassempled and I will take photos from both sides closly , hope to be useful for you
@@a.h.h9647 That would be Awesome !
The Gold Monster Tx coil is closer to the ground than the Rx coil.
You sounded surprised to learn that the Rx coil wasn’t the coil closest to the ground.
From my testing, swiping artifacts in front of the coil, I think that the Manticore Double-D coil receiver coil is near the ground and the Tx coil is raised above the Rx coil. Do you think it's worth exploring reversing the Tx/Rx coils of the Gold Monster?
People complain about one way-hits. Maybe it’s inherent in the design of the Double-D coil, with specific artifact orientation masking scenarios?
I measure 0.20” inch coil gap on the Manticore.
It would make for an interesting demo if moving the artifact by 0.20” demonstrates a break point for one way-hits. But I'm not able to do that simply by sweeping an artifact past the raised coil. I think something else is at play.
Where the Gold Monster coils overlaps you pointed out the wedge shaped profile on the perimeter of the coils. You surmised that maybe they were originally designed to glued together, placing the coils on the same plane. But Minelab chose to otherwise. What might be a justification to glue them together on the same plane?
Tks!
GL👨🦯HH
It may interesting to try, there must be a reason, too much ground noise or reactive effect? Maybe just the engineering department design?
@@DetectorMods If Minelab originally intended to locate the Rx coil on the bottom, there might be a design features that would allow it to be located on the bottom. Less both coils are manufactured exactly the same. In that case you wouldn't be able to tell. Of if the original mold has been replaced.
If Minelab originally intended to glue the faces of the coils together, there might be a key to align the coils. Less the coils need to be adjusted for optimization.
Tks!
GL👨🦯HH
yay
injection mould gate... :)
Great point!