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  IMG_3229.JPG - Left is the push-button switch to power the circuit and the galvanometer. One of the contacts of the instrument broke away, and a new wire had to be soldered with care. All red wires and not quite A-grade solder pads are the originals.  
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Left is the push-button switch to power the circuit and the galvanometer. One of the contacts of the instrument broke away, and a new wire had to be soldered with care. All red wires and not quite A-grade solder pads are the originals. Download
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