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4 hours ago, kiwijw said:

You would have to wonder, since Minelab have pre set the settings internally in the SDC, that they didn't optomise its performance to the 8" coil. Time will tell I guess.

JW :smile:

Didn't think of that, but I would assume its no big deal.

I think a smaller coil would be nice but needs to be waterproof for sure.  Even if the big ones were waterproof then this would be a fun and useful beach machine!

But what I really want to know is if you can put the orignal 8" back on and have the coil or the entire machine waterproof again.  

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2 hours ago, afreakofnature said:

But what I really want to know is if you can put the orignal 8" back on and have the coil or the entire machine waterproof again.

Ask, and ye shall receive:

ctmenquiry@coiltek.com.au

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2 hours ago, Lunk said:

Ask, and ye shall receive:

ctmenquiry@coiltek.com.au

Oh, Thanks Lunk, I think I shall.

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1 hour ago, Gerry in Idaho said:

All of about 3 ounces is all I was able to get my coil over.  Did manage 1 nice specimen though.

Very nice Gerry. Lovely speci. Thanks for the photos. 👍 1st pic......looks like you were a little gobsmacked.:laugh: 3rd pic.....the 15 x 12 commander, if I am not correct. ls a heavyish coil for its size but was a very good coil IMHO. An underrated coil, due to its weight factor. But I liked it a lot. Found me a few biggish, for NZ, bits of gold at good depth that I missed with the 11" commander mono. Wasn't too shabby at small shallow bits either.

Best of luck out there

JW :smile:

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On 3/8/2019 at 7:43 PM, phrunt said:

This is why it's such a puzzle why they didn't make the SDC coils waterproof as one of the SDC coils is the Joey's shape/size.

Might be that the 10 x 5 coil is actually waterproof, but maybe not so there connection point into the detector housing. A lot safer for Coiltek to say it is not waterproof so people dont go submerging the housing. But then if the coils were waterproof but not the housing then you would think coiltek would say that they are ok in water as long as you don't submerge the housing.   Depending if the coils are foam filled, as the coils get bigger then flotation becomes an issue under water. It does beg the question as to why they didnt do a platypus type coil for shallow underwater use. I wonder how many people have actually used the SDC completely submerged under water. There is always the EQ 800. Ok....it isn't a PI....but those coils are how an underwater coil should be made. The GB2 gets away with it as it is solid epoxy filled locking its windings, not foam, & its small size makes it less affected by water flow & pressure exerted on it. Same as the EQ 800's open web design under water. Less coil body to get knocked around by water flow. Same as the Coiltek platypus open design. 

JW :smile:  

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Just a thought, in the form of a question on this thread about the different aftermarket coils being offered for use with the SDC. Isn't the engineered timing on the SDC one maximized (with a super-fast decay rate) to find small gold? The range of timings on the GPX 5000 allows it to search in varying areas of mineralization, as to well as to optimize searching for larger-sized and deeper gold too, right? So, if the SDC has larger coils, I understand the depth advantage to a degree, but what about the limitations of the factory pulse timing?

I don't own an SDC, nor have I used one, so I am in no way a specialist on the machine, nor would I ever pretend to be, but I'm trying to understand the need or the drive to convert a machine maximized for small gold by up-gunning it with bigger coils (and coils that aren't waterproof to be used on a machine whose original advantage was being waterproof) when its specialized timing is designed to find small gold? (Is there enough of an advantage, regardless of the SDC factory timing, because it's lighter to swing?)

Hoping someone can explain the true advantage to up-gun the SDC vs. just using a 5000 with different coils (or the older 4000, 4500, or even the newer 4800).

All the best,

Lanny

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I wrote about this before on this forum.  I use my SDC while dredging in an old cut.  Because there is very little flow the water becomes like chocolate milk so visibility is an issue.  The schist bedrock is completely rotted to clay or broke rock.   You can dredge deep into the bedrock for a few feet but takes a lot of time.  I usually take about 18" of clay/rock.  I always check the bottom or sides of the  hole with the SDC completely submerged and have found nuggets either on the sides or where I didn't go deep enough.

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1 hour ago, Lanny said:

Just a thought, in the form of a question on this thread about the different aftermarket coils being offered for use with the SDC. Isn't the engineered timing on the SDC one maximized (with a super-fast decay rate) to find small gold? The range of timings on the GPX 5000 allows it to search in varying areas of mineralization, as to well as to optimize searching for larger-sized and deeper gold too, right? So, if the SDC has larger coils, I understand the depth advantage to a degree, but what about the limitations of the factory pulse timing?

I don't own an SDC, nor have I used one, so I am in no way a specialist on the machine, nor would I ever pretend to be, but I'm trying to understand the need or the drive to convert a machine maximized for small gold by up-gunning it with bigger coils (and coils that aren't waterproof to be used on a machine whose original advantage was being waterproof) when its specialized timing is designed to find small gold? (Is there enough of an advantage, regardless of the SDC factory timing, because it's lighter to swing?)

Hoping someone can explain the true advantage to up-gun the SDC vs. just using a 5000 with different coils (or the older 4000, 4500, or even the newer 4800).

All the best,

Lanny

Lanny,  As a guy who has used the SDC-2300 in water at Lake Tahoe and found really nice gold with diamond ring (watch the videos) and also used it for hundreds of gold nuggets, I know it pretty well.

It is actually harder to swing than a GPX-5000 and those of us in the know use a Swing Arm.

Yes it was designed to find small gold, but just like a high kHz VLF detector with a small coil is also designed for tiny gold, but why so many of us have a bigger coil?  For bigger and deeper gold.  So the same can be said with the SDC, just like you do with your GPX too.

Yes the original SDC-2300 is waterproof (somewhat) and the coil too, but the coil is buoyant and wants to float.  Most users of the SDC-2300 are nugget hunters who do not hunt in water, just like most users of the GPZ, even though the coil on the GPZ is waterproof.  If CoilTek wanted to make coils WP, they could.. but it would cost them more money, meaning the end user more money as well.

Lets go back and look at history of the SDC-2300.  When I seen the 1st version, it was based off of the Military F3.  That unit was already waterproof, so when they converted, they already had most everything so they kept the Waterproof.

Yes there are limitations to going large coil on any detector.

Remember all the cussing when the SDC-2300 came out, so many people were complaining about it not having any coil options?  Now we have those options and I am very thankful.

These coils are here for the folks who have an SDC-2300 and do not want to have to purchase another detector.  10" ellip coil will be able to find smaller gold than the stock 8" coil.  The other 2 larger coils will find larger deeper gold than the stock coil.  I am not saying it is a GPX-5000 or GPZ-7000. 

Here's something I would like to open up a few eyes.  I promise EVERYONE this.  Go to Rye Patch, NV where so many people hunt gold and I assure you the SDC-2300 will find more nuggets than a GPX-5000. 

Are these coils for everyone?  No, but at this time, these coils will help many users of the SDC-2300 have more options and open up opportunities.

To throw another idea out there.  As someone who enjoys competition.  I'm pretty sure NuggetFinder is watching all this and they just might make a waterproof coil for the SDC, but like most all their other coils, I'm sure they will be $100 higher in price,

Here is the video of us using the SDC-2300 finding a different kind of gold.

 

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3 hours ago, Gerry in Idaho said:

Lanny,  As a guy who has used the SDC-2300 in water at Lake Tahoe and found really nice gold with diamond ring (watch the videos) and also used it for hundreds of gold nuggets, I know it pretty well.

It is actually harder to swing than a GPX-5000 and those of us in the know use a Swing Arm.

Yes it was designed to find small gold, but just like a high kHz VLF detector with a small coil is also designed for tiny gold, but why so many of us have a bigger coil?  For bigger and deeper gold.  So the same can be said with the SDC, just like you do with your GPX too.

Yes the original SDC-2300 is waterproof (somewhat) and the coil too, but the coil is buoyant and wants to float.  Most users of the SDC-2300 are nugget hunters who do not hunt in water, just like most users of the GPZ, even though the coil on the GPZ is waterproof.  If CoilTek wanted to make coils WP, they could.. but it would cost them more money, meaning the end user more money as well.

Lets go back and look at history of the SDC-2300.  When I seen the 1st version, it was based off of the Military F3.  That unit was already waterproof, so when they converted, they already had most everything so they kept the Waterproof.

Yes there are limitations to going large coil on any detector.

Remember all the cussing when the SDC-2300 came out, so many people were complaining about it not having any coil options?  Now we have those options and I am very thankful.

These coils are here for the folks who have an SDC-2300 and do not want to have to purchase another detector.  10" ellip coil will be able to find smaller gold than the stock 8" coil.  The other 2 larger coils will find larger deeper gold than the stock coil.  I am not saying it is a GPX-5000 or GPZ-7000. 

Here's something I would like to open up a few eyes.  I promise EVERYONE this.  Go to Rye Patch, NV where so many people hunt gold and I assure you the SDC-2300 will find more nuggets than a GPX-5000. 

Are these coils for everyone?  No, but at this time, these coils will help many users of the SDC-2300 have more options and open up opportunities.

To throw another idea out there.  As someone who enjoys competition.  I'm pretty sure NuggetFinder is watching all this and they just might make a waterproof coil for the SDC, but like most all their other coils, I'm sure they will be $100 higher in price,

Here is the video of us using the SDC-2300 finding a different kind of gold.

 

Gerry, thanks for the in-depth response.

From what I've gathered from your post, it's more like if I bought a bigger coil for my Gold Racer, the bigger coil would get greater depth and allow me to find deeper gold. On a different note, I also see the advantage for people that already have an SDC and don't wish to buy another detector, so I guess those are two solid reasons; moreover, I guess we'll have to see how much better people do with it out in the field going over the same ground they've detected/same exact patches to see what it will sniff out vs. the original configuration they used to hunt it the first time over.

It's kind of like (and I do mean kind of) when they started offering aftermarket coils for my SD 2100, and how much sharper those coils were (smaller coils, larger specialty coils, etc.) at hitting gold, but there were no options for other timings on that machine, but if a person could get past all of its yodelling (extreme ground or interference, what a racket!), there sure was a lot of sassy gold found with the new coils that way. (I remember with the factory coils, I was pretty much stuck finding nuggets around a gram or larger, and that was it, but after getting some Coiltek aftermarket's, things changed greatly.

Thanks for letting me know it's not easier to swing either, good information. The coil floating on the SDC is a strange one as well. In addition, I don't know why Minelab releases detectors with only one coil option (SDC) and the Z, then releases another later on (Nox 800), and why they don't already have some options ready for initial release?

Regardless, a highly informative post, much appreciated, and all the best,

Lanny

 

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