Whites TDI Beach Hunter.

Here's another tip......keep the Threshold really low. If it's noisy from wind and waves and you are having problems hearing then still keep the Threshold low but turn the Volume up.
The TDIBH in GB OFF will let you hear those "ghost" changes in Threshold but not if the Threshold is turned up too much.

Tony

PS........Try running the Threshold a fraction below the "solid" audio level, effectively just into the quiet zone. You will know this position because the Threshold pot will feel like it's not physically moving at all but you will hear the audio just "drop off" into this "power zone".....a bit hard to explain until you try it out yourself. The machine is kind of "super tuned".....and then adjust the Volume upwards.
 

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Nice job on the finds! :occasion14:
 

The wheels are turning all ready. A external battery for the TDI Beachhunter...Very easy to do and you would never have to worry about changing the batteries. Now all I need to do is buy one...:hello2:..giving that manta till early spring..

20181209_000222.jpg
 

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I have a beach hunter id and it works well in water. I have to say fresh water as I live in the California foothills. It takes a while to get the ground bal. right but it works well for what it's made for. It did develop a small leak in the case. Sent it into Whites and got a new case, ring, three way switch and new seals all around. It cost me 150.00 but have a for all practical uses a new machine that doesn't leak.
 

Joe..... wont you have to have the external battery producing at least the same voltage.... or wont it just equalize out to the external voltage as well as MAH storage. If more voltage increases the depth...... would you loose depth on a weak battery? Seems there is no voltage regulation. How likely is it Joe to add a PP switch to be used on the GB on and off?
 

dewcon4414 said:
Joe..... wont you have to have the external battery producing at least the same voltage.... or wont it just equalize out to the external voltage as well as MAH storage. If more voltage increases the depth...... would you loose depth on a weak battery? Seems there is no voltage regulation. How likely is it Joe to add a PP switch to be used on the GB on and off?
Click to expand...

TDI BH, Stock battery is around 12 volts I believe, run time about 6 to 7 hours. I'll be putting on a 16.8, 76wh (work hours), 5200mah. Yes, Most PI's are current driven, VLF's are voltage regulated. On the GB, very easy. Just come off of the Pot that is used, which may have to be disconnected. Still waiting for the fisher but come early spring, I need deep. I'm betting there will be little difference in depth since the Fisher runs 16 volts also. Discrimination, I'm not looking for...but with the GB mod on the TDI it could be interesting. Just need a smaller coil on both the Fisher and the TDI....12 is just to big, When coil control is important in deeper waters.
 

No kidding ....... why has companies determined water hunters/beach hunter has to have a big coil? On a PI depth wont be that much difference anyway from say a 10 to 12 inch coil... unlike a VLF. Plus who wants to FIGHT with a big coil in moving water which gives you very poor coil control..... then if it floats..... ugh. A lot will also depend on tones Joe...... most know what the TDI is..... but what will the disc and tones on the fisher give us? If its better on identifying targets..... it will be an easy choice.
 

Great machine! Have been using it for a few months and it is very sensitive to gold and silver. With ground balance on you get dual tones and can hear an iron sound. It’s a little heavy, so use a sling or move the control box to your belt. I recently got my RNB 3100 Lithium battery pack to work with this detector. Extends the usage time and yields 12.4 volts for much longer than AA batteries or the standard HD rechargeables also is much lighter.
 

Spare battery case slightly modified to take 4 x 18650 Li-ion 3500 mAh cells will power a TDI BH, SL or SPP all day.

DSCF0569.JPG

ivanll
 

ivanll said:
Spare battery case slightly modified to take 4 x 18650 Li-ion 3500 mAh cells will power a TDI BH, SL or SPP all day.

View attachment 1660996

ivanll
Click to expand...

Like to see a picture of your work and details on the batteries used? I just made a battery pack for my heated gloves using the Samsung 3.7 volts 2600 mAh 18650 Li-ion. Gloves are 7.4 volt..

I'm guessing but you must be MAx charging the battery's to get that many volts from 4.

20181211_172727.jpg
 

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4 x Keeppower Protected 18650 cells, newly installed in battery case without the lid ........... 1 Amp load.

DSCF0578_600.JPG

ivanll
 

Added depth is great...... but a lot of times if the sand has everything buried gold just isnt there unless something moves. Winter months can be good hunting...... longer tide swings, deeper tides pulling targets off the beach more than in the summer, at really low tides you can get more long shore drift and bigger waves from the lower water hitting the sand bars/slopes in the water...... and of course the wind as we get more strength from the jet stream. Watch the movement ...... then bring out those PIs.
 

ivanll said:
4 x Keeppower Protected 18650 cells, newly installed in battery case without the lid ........... 1 Amp load.

View attachment 1661118

ivanll
Click to expand...

nice setup can you send me a link i would like to try these cells out just need to know where you bought them and extra battery case i just ordered my TDI BH TODAY any help would be great thanks ivan
 

Battery case used above is a modified AA cell battery case included with the TDI BH.


Keeppower protected 18650 Li-ion cells were purchased on e-Bay Australia, a charger for these cells are required.
 

More details as requested the lid need to be slightly flexible to accommodate and curve over the larger 18650 cells, beyond this it's a simple modification.

DSCF0590_600.JPG
 

Joe...... in order to get that higher voltage woudnt you first have to change the batteries inside...... then the ones in the Pod have to be the same or they would equalize the voltage much like water will do with a restrictor to the lower voltage? Couple of hundred bucks for that pod mod...... but NOT opening that box would save you down the line id bet in repairs.
 

Dew, these are the things I am thinking, and I haven't even got one yet........... external battery if I go the TDI, opening and closing that door is not a good thing over time if you are a "in the water hunter". Plus the batteries would not be limited to the size of the battery box. Being a external battery there are so many more options since the excalibur pod can hold a LiPo. See the TDI is a current driven machine, you hunt 6 hours, the last few hours your not at the top of your game on depth because the voltage is lower. With a external battery you could carry a extra battery and 3 hours into the hunt just change out batteries, the voltage stays at it's best, for deeper targets.......

Come on Fisher your testing my patients...
 

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