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Author: Subject: Unusual mystery item
International Hazard

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[*] posted on 1-3-2017 at 03:38
Unusual mystery item

This thing here is the dandest thing. It is finely cut black stone, very heavy and has two electrical fittings to it where it would appear something sits. Never seen a bit of kit made from stone and the two electrical contacts go to those banana type connectiobs.

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[*] posted on 1-3-2017 at 03:43

anti-vibration base for a speaker? Would keep the bass from rattling.
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1-3-2017 at 08:45
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[*] posted on 1-3-2017 at 11:35

This reminds me of those granite blocks used in machine shops as a plane reference, they're called surface plates (though this one is quite thick, hardly a 'plate'). Useful for doing precise measurements and checking squareness.

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[*] posted on 1-3-2017 at 12:54

Can the metal lid be removed?
Can you measure any resistance between the wires? Could be a heating block for some apparatus.

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[*] posted on 1-3-2017 at 14:00

Looks like part of a high voltage spark gap, but the
parts that attach to make the gap are missing.

It could also have been a test sample of some kind
but the positioning is wrong for the electrodes.
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