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#8
03-06-2023, 11:08 PM
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FWIW, here is an exerpt from a post of several years ago, although it doesn't mention the light blue form:
It's easy to verify that the coil form is mechanically sound by 'wiggling' it briskly. If it's compromized, it'll be obvious and the coil will act like a Slinky. There were three types coil forms that were not prone to this problem: 1. Brown phenolic 2. Yellow plastic 3. Solid white (opaque) plastic The one that's always suspect is a whiteish semi-translucent plastic. 
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Threaded Mode