Jim in Idaho

Jim, that would be a very generous thing to do. I'm sure at least several people on this forum would be really grateful for that.

Jim

Wow! Gary, I had wondered where you got off to. Think of you often. Really sorry to hear of your health issues, but tickled pink to see you have it beat. Looking forward to some beach relic, and treasure pics. I'm still using my modified SL I think I added the vernier control knobs after the last time we communicated. They are the nuts for easily setting, and fine adjusting, the GB, and threshold.

 Also, we still have one  mod left to do on our SL's. I'll look that up, and send you a PM tonight. Seeing you post is making my day!

Jim

Much better pics, Jim! Now if we can just get an engineer to look at that, and draw up a schematic for that board, we're gold! Many thanks!

Jim

I've used mine on my TDI SL, and was pleasantly surprised how well it did.

Jim

Right, but it's already been down to zero at my place, and several nights in the single digits. Just sayin'.

Jim

The truth of the matter in all this, sadly, is you only have the legal rights you have the financial means to defend. That's the real world we live in.

Jim

Probably. You might be able to run higher gain with the DD.

Jim

My understanding was that before the GMT, the Goldmasters were tuned to work with the concentric coils. Those "red", or "green" 6 x 10's were, I believe, concentrics. Where the ground allowed, they were very good. They even made the GMT better, in some instances. I've never used mine with a DD 6x10, though I found a great 2lb chunk of copper with it, using the 8x14DD.

Jim

The V-SAT's a great machine. I've got a GM2 and a GM3, and the 3 is still one of my favorite detectors. The 6 x 10 is good...all you really need, but the smaller coils would be better where the ground is hotter, as they "see" a smaller patch of soil, and thus mineralization. I've owned a GMT, and now own a 24K, but still don't feel handicapped using the GM3. The smaller coils also find use where the brush is heavy, or working around larger rocks in rough country.

Jim

Sad to hear this. A real loss to his family, and the detector community. My condolences to his family and personal friends.

Jim

Paul, please don't lose that added board. It would be nice if an engineer could figure out what that circuit is.

Jim

Best thing is just buy an SL, do whatever of Reg's mods that weren't done at the factory, build a 16v battery pack, and that SL will equal the original TDI easily, with a very smooth threshold.

Jim

4 hours ago, PhaseTech said:

In my limited time behind a TDI, the original TDI and TDI Pro Oz with the changed ground balance pots were both very unsettled in the threshold department. What was worse was to get the threshold level to where you want was a micro movement of the threshold pot. A fraction of a turn to the left and it was too quiet, and a fraction of a turn to the right it was too loud. Always thought it could have done with a higher value pot, or even better one of those 3 3/4 turn pots so it allowed for a finer tuning. 

As for threshold Stability, yes the TDI SL was a lot better, and I thought whatever mod was done to achieve that would be great if it could be variable, so you could set to to where you want between Standard (ratty) and SL (smooth), like the V/SAT on the goldmasters. 

I put vernier dials on my SL. Made a HUGE difference in setting fine Ground Balance, and Threshold. I used to sell them, but am far too busy to monkey with them right now. Here's a link to the dials I used. If you want numbers, you have to make a disc, with numbers, to go on them.

https://mgs4u.com/product/vernier-reduction-drive-14-inch-to-14-inch/

Jim

Are those subs insulated at all, Caleb? I'd imagine they are, or it would take a ton of battery power to keep it even moderately warm inside.

Jim

The big box tdi stability mod required some additional circuitry (small circuit board) that is probably no longer available. I don't think Reg ever disclosed exactly what that circuit was.

Jim

There's a huge one a bit north of me. The highest peaks in Idaho are on the rim of it. It's estimated to be 1,000 -500 ma. The Beaverhead crater. It was discovered late, too.

Abstract
The Beaverhead impact structure in southwestern Montana and eastern Idaho is an allochthonous^*  fragment of a large impact structure (~100-km diameter) that was transported some distance eastward during the Cretaceous Sevier orogeny. It is the first tectonic fragment of a large impact structure identified in the geologic record. The present evidence for impact consists of shatter cones, pseudotachylites and planar deformation features in quartz. The age of the impact is not well contrained but is estimated to be Neoproterozoic to Cambrian (1,000-500Ma).

^* allochthonous – found in a place other than where they and their constituents were formed

Yup, does to me. Maybe that one coil has lower resistance than the SL circuit requires. That would allow more current to flow, raising the heat. That's good for you. It means you can charge your pack to 16v and enjoy the benefits, using the other coils. Good deal!

 I've found the Sadie, and 7 1/2DF to be very near equals. Actually slightly prefer the DF, but wouldn't feel handicapped with nothing but the Sadie in tight quarters.

Jim

I ended up selling my MJ 5x9., Jeff. I just didn't think it was very good. I much prefer the DF 71/2, or 8 x 6 Sadie. I do like the MJ 8 x 12, however. Sorry to hear your detector gets hot with the 16v battery. it does make a difference.

Jim

Jeff, what voltage are you charging the 4-cell pack to? It should be making a noticeable difference.

Jim

Absolutely incredible! Thanks for posting!

Jim

I'd think it would be really difficult to get a patent on a pick. A patent has to satisfy two requirements. It has to be unique, and non-obvious.

No way I'd pay $170 for something I can make in a couple of hours. My pick was made from an old shovel, and a piece of scrap steel. Hard-faced the pick end. It's worked for over 10 years. Broke one handle, but easily replaced. Got a 1" super-magnet in the end

4 hours ago, rled2005 said:

That’s RLED2005, you can call me Randy.😄

Bad eyes...LOL

Jim

Many thanks Ried! Really good pic, with instructions. Much appreciated.

Jim

I'd buy a couple of these LiFePo batteries. They're 8 amp/hour. I use them on my mineral jig, and other equipment. Very lightweight, too. Good for thousands of charge/discharge cycles. Cost me about $100 each when I bought them. Just looked them up, and now only $67 on Amazon

LiFePo batteries

10 hours ago, rled2005 said:

I put white Gorilla construction adhesive on it to seal the coil bottom. Looks great. It works 10 times better now. By adding some closed cell foam in three points to equalize the cover pressure the problem went away. No bump problems now!

I'd love to see "exactly" where you put the foam. I had a hard time from the pics.

Jim