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Instrument is a Geonics EM16 VLF receiver, using in the mineral exploration industry to find buried linear conductors.
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this post was submitted on 16 Oct 2024
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Protip: once you dissolve as much of the gunk as possible, take a small metal brush and give the contacts a scrub. If they're coated, this helps open up metal contact surface to give the new batteries a chance.
But if the contacts are too corroded, you may need to MacGyver something with a soldering iron.
please advise how to dissolve the gunk at home (using household items, cleaning products, or something that is available at local stores).
Someone said "use acid", but I'm like "how the F am I supposed to get acid?"
Vinegar is acetic acid. Distilled Vinegar is quite useful as a general household cleaner.
Lemon juice contains citric acid.
CLR or a similar product that takes care of limescale (etc) is a mixture of acids.
Muriatic (another name for hydrochloric) acid is available from most hardware stores and can be used for dealing with rust.