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Gramophone for Crystal Radios

Gramophone for Crystal Radios

thingiverse

This is gramophone designed for boosting the sound from a crystal radio speaker (mouth piece or headsets) physically. There are two design: 1. for small crystal radio mouth piece. 2. for larger horns speaker driver Refer to my blog for more instructions. http://billydiy.blogspot.com/2020/10/3d-designed-gramophone-for-crystal.html

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