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T Top bobbin numbers?

guitartsar

Member
Joined
Jul 24, 2010
Messages
77
Does anybody know what the numbers on the top of the bobbins on a T Top mean? Usually 2 and 4 or 1 and 3 or other combinations of 1 2 3 4. I've found some mentions of the numbers on the interwebs but not any explanation of what they mean so I'm intrigued.
The picture below is of one of the T Tops in my 70's Les Paul Custom.
Thanks!
 

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Big Al

Well-known member
Joined
Apr 24, 2002
Messages
14,244
The steel mold would have more than one coil form. Each injection cycle would spit out 4 coil forms from the 4 cavities machined into the mold. The numbers identify which coil form cavity they formed in.
 

guitartsar

Member
Joined
Jul 24, 2010
Messages
77
The steel mold would have more than one coil form. Each injection cycle would spit out 4 coil forms from the 4 cavities machined into the mold. The numbers identify which coil form cavity they formed in.
Cool that makes sense. Thanks!
 

El Gringo

Well-known member
Joined
Apr 8, 2015
Messages
4,000
The steel mold would have more than one coil form. Each injection cycle would spit out 4 coil forms from the 4 cavities machined into the mold. The numbers identify which coil form cavity they formed in.
Welcome back Big Al !👑
 
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