On 2024-03-12 08:56, evert at pa2kw.com wrote:
> If someone could tell what manufacture/type/model these cores are, I'm
> sure you can get this done for $20
>
*** Generally, it's well known what mix is required. Here's a good
article by Palomar Labs:
https://palomar-engineers.com/ferrite-products/ferrite-cores/ferrite-mix-selection
- Jerry, KF6VB