T80 Iron Powder Toroid Inductor Core Micrometals Toroidal Coil Former T-80

This is one item of new iron powder toroidal inductor core from Amidon - Micrometals available in various frequency grades. These are the T80 size where the outer diameter is 20.2mm, the inner diameter is 12.4mm, and the height is 6.4mm.

These are used to make high Q inductors for use in matching and filtering.

Yellow-White types are intended for use in the frequency range below the red types, so if you were looking for some MW radio transmitter cores they can be a substitute for the harder to find blue types in some applications. You can see a test winding in one of the pictures. You can also see the red types being used in a 7 pole 2MHz. corner frequency Chebyshev harmonic output filter.