"...The core increases the magnetic field in proportion to its relative permiability (uR). Unfortunately I bought the cores many years ago and have mislaid the spec on the core material.
The uR can be as much as 10,000 for ferrites, but the field can be limited by magnetic saturation before you reach that multiplying figure..."
"...This material does not hold the magnetism after the current turns off..."
Obviously those rods are made from compounds with lower permeability. How much the uR can be than?
It is desirable to establish the "reference"; if you know what i mean?
Common medium-wave antenna rods are not having high permeability... comparing to mumetal stripes used in fluxgate sensors.
But according to Ferric's notices; those are still having permeability larger than needed in this case.
So? How to distinguish that and to find proper rod? A " reference"?
Otherwise; whole story further will not make much sense, because each one will face quite different results.
Other solution; to prevent saturation of the core at right moment. How?
The uR can be as much as 10,000 for ferrites, but the field can be limited by magnetic saturation before you reach that multiplying figure..."
"...This material does not hold the magnetism after the current turns off..."
Obviously those rods are made from compounds with lower permeability. How much the uR can be than?
It is desirable to establish the "reference"; if you know what i mean?
Common medium-wave antenna rods are not having high permeability... comparing to mumetal stripes used in fluxgate sensors.
But according to Ferric's notices; those are still having permeability larger than needed in this case.
So? How to distinguish that and to find proper rod? A " reference"?
Otherwise; whole story further will not make much sense, because each one will face quite different results.
Other solution; to prevent saturation of the core at right moment. How?

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