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Wireless connection - under water?
Posted by: WaterWalker
Date: September 18, 2017 01:30AM
NOW this would be a game changer: IF the wireless connection will remain communication when the control box is submerged.

Both the ATMAX with the Z-Lynk and the CTX3030 loose connection between the control box and the headphones when the box is submerged.
The ATPro with the Z-Lynk system is not submersible.
The Deus has a wire aerial antenna kit to bring the signal up from the coil to the control box, but the waterproof headphones are still attached to the control box via a wire. Really...not wireless headphones.

Any of you tester --- comments please.

Re: Wireless connection - under water?
Posted by: trojdor
Date: September 18, 2017 04:28AM
Unless Minelab has found a way to violate the laws of physics, there's absolutely no way a bluetooth frequency/device can penetrate any distance in/under water.
(Especially seawater.)

Re: Wireless connection - under water?
Posted by: pasttom
Date: September 18, 2017 12:31PM
Laws (physics and otherwise) are made to be broken (see faster than light and sky hooks). Okay not yet, but we still try to figure it out and the one who does wins! :beers:



Pastor Tom
7 Minelabs, 3 Makros and a few others - rebuilding inventory
under the watchful eyes of my Welsh Corgi Sadie

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Re: Wireless connection - under water?
Posted by: Champ Ferguson
Date: September 18, 2017 02:36PM
Quote
pasttom
Laws (physics and otherwise) are made to be broken (see faster than light and sky hooks). Okay not yet, but we still try to figure it out and the one who does wins! :beers:

+ that thing where they can slow down the speed of a light beam.



Minelab CTX
Minelab Excalibur II
Minelab Safari

Re: Wireless connection - under water?
Posted by: Doctorcoinz
Date: September 18, 2017 03:50PM
Lower radio frequency's will travel through salt water i believe. Higher freqs don't cos the conductive salt water absorbes much of the signal.

Re: Wireless connection - under water?
Posted by: trojdor
Date: September 18, 2017 04:44PM
Quote
Doctorcoinz
Lower radio frequency's will travel through salt water i believe. Higher freqs don't cos the conductive salt water absorbes much of the signal.

Yes, ELF (extremely low frequency) frequencies can...but the transmitters and antennas are huge...as are the power requirements.
That's how submarines communicate.

See Wiki article here:
https://en.wikipedia.org/wiki/Extremely_low_frequency

A good rule of thumb is that the 2.4gHz band...in salt water...gets attenuated by about 200 db/meter. (In other words, it kills it off dead immediately.)
Underwater communication normally requires very low frequencies (10 to 30 kHz) (where attenuation is in the order of 3.5 to 5 dB per meter) and lots of of power.



Edited 1 time(s). Last edit at 09/18/2017 04:59PM by trojdor.

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