Tony

What he said 🔝

👍👍👍👍👍👍👍👍👍

The pack I use sits snugly in the battery housing area....no padding needed. The orientation of the pack is important (see photo). Just hook up the battery and then gently slide in the battery pack.......the pack doesn’t move around at all 👍

And here’s me thinking the Flux Capacitors (used for Time travel) might be in the Time Ranger Pro...........😂

The decal adds a nice bit of colour.....I like it 👍

11 hours ago, Chase Goldman said:

First Texas is working on that one...

You mean on the “Time Ranger Pro”.........maybe Steve can check for those special capacitors 🤫

10 hours ago, Geotech said:

First of all, "power" is a wrong metric for metal detectors. A single-frequency VLF with a perfect TX coil will transmit zero power since all the current gets recycled. A traditional PI has a total loss transmitter but even then "power" doesn't make much sense.

For the "transmit strength," yes, it is current that matters along with the number of turns of the TX coil. We call that the "ampere-turns" (N*I) and the TX magnetic field is proportional to N*I for a given coil size. It doesn't matter what the driving voltage is except that it is part of the system design.

As Pimento suggests, you can't look at the battery current and tell anything. TX pulse width and pulse frequency also combine with peak TX current to determine average battery draw. And once you know the peak current, that doesn't necessarily reflect actual performance. For small nugget detection you need to be able to sample early and the higher the peak current the harder it is to do that. Early sampling isn't important for an Atocha bar detector so you can dump 100 amps of current through the coil, but that same system might not be able to detect any nuggets smaller than, say, an ounce. At all.

Finally, there are methods of energy recycling in PI detectors, although not yet prevalent in production models. Another reason why you can't look at battery consumption and determine anything.

I actually understood most of this as I have read plenty of basic PI theory.

But surely the Flux Capacitor must play a big part in all of this 😉

What have I started.......😳

Thanks for all of this interesting information......

So, in essence, it’s the culmination of the;

1. The square boxy bit with the buttons and knobs

2. The round thingyamejig at the bottom

.........and everything in between.

It appears that Minelab do make a good version of the above and manage to keep all of the smoke from escaping.

 Tony 

Okay all you propeller heads......

When it comes to PI detector power, it’s Amps that matter first.....correct ?

Minelab PI’s: Operate around the 7.2v but draw close to an Amp

White’s TDI: Operate at 12v to 16v but draw about half an Amp

So voltage is “electrical pressure” but Amperage is “the rate of electrical flow”.......

What controls the Amps........just the MOSFET 

Steve......didn’t know where to post this question so feel free to move as needed.

 Thanks 

Tony 

I’d like to try this coil on my TDIBH

Yep, that was a great read alright. One 👍 isn’t really enough so here’s 👍👍👍👍

Thank you Michael

Tony

On 4/19/2020 at 7:33 PM, karelian said:

That Super Pulse 220 mono coil uses the time proven 9.5 housing so common on earlier White's. So scuff plates are easy to replace and coil hardware is all White's. Performance on the Tdi Sl is good, particularly with the higher voltage battery pack. A great all rounder.  The small 6 x 4 Tdi coil is super easy to ground balance and super quiet on the hottest ground, but is so small I rarely use it. If you can find one, pretty rare are the White's 7.5 mono coils made for OZ, good for the goldfields but maybe a bit small for the beach?

Another option would be the Razorback 10 x 6 mono, super light weight, good performance and decent coverage. Not sure how it would work out hardwired on a Beachhunter, but in hot ground it would be easier to ground balance and operates a bit quieter and smoother.

Thanks for the detailed response, much appreciated.

Detech do a nice 8” or 11” mono.......11” is tempting as a good size for the beach and (potentially) gold fields...if I go down this route. Coiltek also do a nice 9” Elite mono. I don’t use the TDIBH in the water so a light floaty coil is no problem at all.

I shall update if this goes ahead.

 Thanks Tony 

Thanks everyone for these replies, sounds like a smaller mono is the right direction.

Any thoughts on a larger DD coil ??

 Tony 

7 hours ago, RickUK said:

I may well be wrong but i always thought the TDI Beach Hunter coil was hard wired to the control box ?? on my TDI Pro when using it on high mineral ground conditions i use either the 7.5'' DF or 10x5 folded mono.Both work exceptionally well but still not sure about the Beach Hunter version though.

My favourite coil that i mainly use 90% of the time on the TDI is the Coiltek 14x9 mono which is as light as a feather because the coil is foam filled rather than resin but of course it would be totally rubbish is surf or water in general as the coil wants to floats like a fishing float 🙂

Hello Rick

Yes, it is hard wired but I have opened the case a few times and to hook up another coil isn’t too difficult, although it’s not something I’d do on a regular basis. Finding the best coil is where the research comes in. Thanks Tony 

I recently tried out my TDIBH on some fairly mineralised ground and it was a disaster......no setting of the GB or Gain would calm the machine down.

My question is what sort of coil might work well......Mono....DD....concentric......and what size?

The stock 12” Dual Field is sensational on the beach but that’s all it’s good for.

I’d like to try a large DD to see if it could tame the bad ground...but the single turn GB may still not be enough?

 Love to hear from the experts

Thanks

Tony

Thanks Gerry.....Will PM you.

Tony

PS.......I have that very nice TDI Beach Hunter that you sold me in 2018. It sure has found me some nice gold on the beach 👍

On 10/29/2019 at 11:02 PM, Gerry in Idaho said:

I still have a couple older SD and GP detectors.  Good to see some gold finds recovered with the older PI.

Let me know if you want to shift an SD or GP.......looking for one in nice condition if possible. A 3500 would be nice !

 Thanks 

Tony 

On 10/31/2019 at 1:14 AM, 1864hatter said:

Thanks for your comments guys. I've promised myself that once I've found enough gold to cover the cost of this detector and coils I'll upgrade to a later model PI. Or a dredge... 

Let me know if you decide to upgrade.....what sort of condition is the 2200 in ?

 Thanks Tony 

At the 2:00 mark..........I couldn’t help but think that it could “flat line” 😳

Tarsacci was badly falsing in between the targets so sensitivity was way too high.

Other machines were nice and quiet which means they probably had some power to spare ?
 

Good test really especially swinging in between targets to gauge falsing.

5 hours ago, pinpointa said:

Well for me i would not sell my v3i . It is an absolute dream of a detector once you master to program it to your liking. Mine is the original v3 updated to the v3i. bought in 2009.

And here’s me swinging my XL Pro...........and loving it 👍

3 hours ago, locator said:

Thank you all for your time and effort to help.

Knowing that I'll keep my VX3 for sure as it became my grab and go machine.

May be there is a V3i added in the future. (a man can never have enough detectors 😉 )

“A man can never have enough detectors”..........obviously you haven’t met my wife 😳

You are welcome......how’s the ground in your area ?

If it’s quiet then the TDIBH might be viable ???

Okay....results are in.....and it was an ugly experience for sure.

No matter what setting I tried, even with low gain and increased pulse delay, the old girl screamed her head off. The ground was quite mineralised so in benign soil then things might be okay but in traditionally mineralised goldfields then it is a futile exercise. The GB didn’t stand a chance and I think I scared off most of the wildlife In the area......time for a cold beer to steady my nerves.

Now in parts of the USA, a lot of gold bearing ground is in much, much milder soils so that might work out. Do your homework before venturing to new ground......if it’s anything but benign ground.......don’t take the TDIBH 👎

Yep.....that was some years ago !

Keep well 

Tony