Tesoro sand shark doesnt change tone......any ideas?

SADS 669

Bronze Member
Jan 20, 2013
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3,739
Long Island, Bahamas
Detector(s) used
Tesoro Sand Shark....Aqua pulse 1B....Equinox ll
Primary Interest:
Shipwrecks
Tesoro sand shark doesn't change tone......any ideas?

My sand shark turns on......gives all the correct noises across the normal start up but will not react to any metal dry testing ( there is a very faint change in tone but not much) it normally screams out.

I have changed all the knobs to minimum, Maximums etc with no luck, I put new batteries in too.....

Any ideas apart from sending it to the factory which I suspect it needs.
 

Last edited:
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I suspect a bad coil or corroded coil connection.
 

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