The conversion from uh 100 turns.
Iron powder core vs ferrite.
Iron powder cores low permeability are superior to the ferrite material cores for high power inductors for this reason.
Still i want to avoid really bad mistakes like using iron powder when i m building an antenna balun.
Some other time an iron powder core may be just right and a ferrite core may be a bad idea.
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.
Using a vectorial network analyzer i measured the cmrr on both chokes obtaining the following results.
Manufacturer s data for iron powder and ferrite cores are in the data tables and show all the required information.
Let s focus on simple toroids of different sizes as a start because this is what most iron powder cores look like.
That 160m 180m transformer requires about 50 turns from my experience with high power rf transformers i know that iron powder toroids are less.
The main thing to consider is ferrite and powdered iron cores.
The metals have different aspects to them and as such each react slightly differently.
Of each is use is no simple take.
Fewer turns will be required by the ferrite type core for a given inductance.
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.
Note that many other manufacturers quote al as nh t2 for both types of material.
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.
These types of inductor use ferrite core.
Ferrites for the transformers because i have these ferrite ring cores but i do not have the iron powder toroids.
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 or if you are working with.
Also using type 43 ferrites would allow me to use fewer turns.