Introduction: Copper Horn Amplifier

Made from laminated pine, shaped the gramophone record with a jig, heated the record in the oven and pressed the same in the jig, and the speaker is placed on the hole circle which has a corresponding out- let on the side

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More by James NairnM:Hand Grinder to a Plunge Saw, From Disc to a Saw Blade With Added Safety GuardWooden Clamps All From Laminated PineAdditions for a Drill Press
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