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Hints, Tips and Solutions (Do NOT post requests for help here) If you have any useful general hints and tips for vintage technology repair and restoration, please share them here. PLEASE DO NOT POST REQUESTS FOR HELP HERE! |
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8th Aug 2015, 9:55 pm | #1 |
Nonode
Join Date: Oct 2014
Location: West Midlands, UK.
Posts: 2,181
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Drill motors
Prompted by a post in Homebrew (https://www.vintage-radio.net/forum/...d.php?t=118653) for a 12v drill speed controller . It took me back to an emergency drill motor I lashed up,which might give food for thought. A lot of commercial office dictation equipment use a motor speed control board and a 12v motor with feedback to control speed of tape motor in record/playback mode. Problem is how to connect drill to shaft. I found that the innards of a cable connector on the shaft, with sleeving on the drill gave a reasonably wobble free ( albeit a bit HR) drill. I added a push switch and powered it from my Weller iron ( rectified /smoothed /regulated to 12v ) ac output.
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