Manufacturer s data for iron powder and ferrite cores are in the data tables and show all the required information.
Iron powder core vs ferrite.
Fewer turns will be required by the ferrite type core for a given inductance.
Of each is use is no simple take.
Ferrites for the transformers because i have these ferrite ring cores but i do not have the iron powder toroids.
When or if you are working with.
Ferrite is a material with high magnetic permeability made from the mixture of iron oxide ferric oxide fe 2 o 3 a small percentage of other metals such as nickel zinc barium etc.
There s a distributed nonmagnetic gap in the these cores which increases their saturation flux density in comparison to an ungapped core or the same material.
Let s focus on simple toroids of different sizes as a start because this is what most iron powder cores look like.
Dust cores powdered iron metal alloy or ferrite dust are made of ferromagnetic particles mixed with a non magnetic binder.
There is a simple thing to remember that can help you make a decision.
Making a decision between the two and how much.
The al figure for iron powder cores is given as uh 100 turns but for ferrite cores it is quoted as mh 1000 turns.
When the same voltage drop is applied across a decreased number of turns the flux density will increase accordingly.
Still i want to avoid really bad mistakes like using iron powder when i m building an antenna balun.
Note that many other manufacturers quote al as nh t2 for both types of material.
These types of inductor use ferrite core.
Also using type 43 ferrites would allow me to use fewer turns.
That 160m 180m transformer requires about 50 turns from my experience with high power rf transformers i know that iron powder toroids are less.
Using a vectorial network analyzer i measured the cmrr on both chokes obtaining the following results.
In order to evaluate the choking characteristics of the red toroids i prepared two chokes by winding 12 coils of rg 58 on a iron powder t200 2 toroid and a ferrite ft240 43 one.
The metals have different aspects to them and as such each react slightly differently.
Some other time an iron powder core may be just right and a ferrite core may be a bad idea.
