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Semper non compos mentis
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Downloads: A new file has been added by Herne:

Perimeter Monitor Circuit

A remote microphone that can be placed at the bottom of the garden, in the shed, near a gate or entrance-way. It runs to the house or other listening post by means of a single two-core cable, like speaker wire. Put it in a waterproof housing and use it almost anywhere.
 
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