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Old 16th Sep 2022, 5:20 pm   #4
Tantanometer
Triode
 
Join Date: Oct 2019
Location: Virginia Water, Surrey, UK.
Posts: 25
Default Re: Vintage Clock Bobbin rewind

Hello George,

Have a read of this excellent article https://sound-au.com/clocks/ocm.html.

Basically, what he suggests is rewinding the bobbin for a lower voltage using much thicker wire. I used this method to repair a 1930s Hammond electric clock movement and it's still going 8 years later. I made a new bobbin from cardboard, used epoxy resin to strengthen it and then filled it with 0.315mm (30SWG) enamelled copper wire which is substantial enough to wind by hand. As predicted in the article the motor ran at about 15V AC and is now fed from an old "wall wart" transformer making it considerably safer than the original design.

Have a go there's nothing to lose.

Len
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