What's this cylinder on my various power cords?
- Thread starter Shel_B
- Start date
Better explanation:
https://en.wikipedia.org/wiki/Ferrite_bead
tl;dr power cords can act as an antenna and this acts as a filter to prevent unwanted electromagnetic interference to and from the device.
https://en.wikipedia.org/wiki/Ferrite_bead
tl;dr power cords can act as an antenna and this acts as a filter to prevent unwanted electromagnetic interference to and from the device.
I have one of those on my Dremel Grinder and always wondered what it was.
Everything is so complicated today.
Everything is so complicated today.
Secret trick -- stick one of those things on your fuel lines, and it will improve your gas mileage! 
(/s…obviously)
(/s…obviously)
Fe core is usually to keep noise away. Your grinder may generate a lot of noise in the power line that without this core can cause problem in your house, crashing routers and TVs and other small electronics and fail those FCC test.
