Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Just a WAG, but it could be to increase the DC current before core saturation occurs, if the magnet polarity was such as to counter the flux from the DC current.
I am stripping parts from TV circuit boards, I keep finding this. Some circuit boards have 2, some have 1, some have none.
I assume they are chokes they have only 2 wires. Wire is would on a ferrite piece with a magnet between the ferrite and the plastic base. The heat shrink plastic keeps the magnet from falling out. They look just like these but these have no magnet. They all have 2 wires. One if these in the photo has 3 pins but wire goes to only 2 pins.
I was just about to say they came out of TV's , they are used for line linearity chokes and such things - as already suggested the magnets alter their characteristics, and in many older sets were often adjustable.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.