TDI Beach Hunter....... It's Alive !!

[pjrough]

 

This is my white's TDI beachhunter li-ion battery pack. Just have measured the power consumption. Detector takes 535mAh. Impressive.

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Trying to adjust TDI's buoyancy by adding some lead shots. The grip can take only around 200 grams, but it's not enough.

well... it's better then nothing....

 

***

 

also 3d printed slim coil protection and luet it to a coil with some silicon.

[Mark Gillespie]

On ‎9‎/‎15‎/‎2018 at 2:53 AM, Tony said:

Just got back from the beach....in one word.........awesome. Some observations;

It is the deepest detector I have ever used on the beach (in the past 25 years) by running the higher voltage pack.

It is the first time I have ever detected (with any detector, including the Minelab PI's) my gold wedding ring at a measured/buried 18" deep.

The US nickel can be heard at 16" in buried wet sand...but with GB OFF. With GB ON it drops to 12"-13" !

My machine is much deeper with GB OFF across all targets.....the rock solid threshold with GB OFF is unbelievable with no loss of sensitivity.

Even with the coil swept through shallow salt water at max gain and 10us......it is so smooth. I don't know how White's have done it....maybe a new batch of the latest flux capacitors......

I tried with GB on but in clean white sand, there was no perfect GB....it was close but just a slight positive signal as the coil was lowered to the ground...but the depth loss was significant with GB on and slight falsing with higher GAIN. None of this is a problem with GB OFF.

Tony

Very interesting depth post.  US nickel at 16" in the wet salt sand area.  My SL can't come close to that even with the stock 12" dual field coil.  It would be interesting to know a little more on the subject.

Stock 12" coil?

Pulse delay, 10?

Gain?

Frequency offset -, 0, +?

Battery voltage?

 

[Tony]

Hello Mark

Gain at max and delay at 10us......plus the extra voltage of course. This is where the extra 1 to 2 inches comes from over the standard pack. I leave the frequency at the 12 position. Stock coil. Turn the threshold down low.....a fraction below where it is heard AND increase the volume.

Tony

[Tony]

Plus Whites state that the hardwired coil gets more sensitivity.........They may well be right on this one.

[tboykin]

11 hours ago, Tony said:

Plus Whites state that the hardwired coil gets more sensitivity.........They may well be right on this one.

Any connector in between the PCB and coil would create resistance. Without the connector it's like running straight pipes on a hot rod - you get a little more grunt.

[Mark Gillespie]

11 hours ago, Tony said:

Hello Mark

Gain at max and delay at 10us......plus the extra voltage of course. This is where the extra 1 to 2 inches comes from over the standard pack. I leave the frequency at the 12 position. Stock coil. Turn the threshold down low.....a fraction below where it is heard AND increase the volume.

Tony

That is very impressive results from your machine.  Mine will struggle to get 12 1/2" on a nickel and that is at best with the 12" stock coil, but of course I have a regular SL built in 2014.  I have wondered about the extra voltage from a new battery pack, but I'm happy for you.

 

[Tony]

..........And GB off