[Hpsdr] Alex TX-Filter - Material for Ringcores

[Gerd Loch]

Hi,

I would like to understand the basic properties of magnetic materials:

which types of magnetic materials should be used for lowpassfilter toroid
cores?
Iron-powder cores or ferritcores (NiZn, NiMn..)

For example: material no.2(iron powder, Amidon, Ferrite) is specified for
frequencies 2-30Mhz
Material no.43 (Ferrite) is specified for the frequency range 1-50MHz in
broadband applications.

What are the main differences in the range of 2-30MHz besides
permeabilty/Al-value and which material is the best choice for which
application?

Which materials are you going to use for Alex?

Gerd, DJ8AY