Before I begin winding my coils around rods for wireless power, I was using online calculators to calculate inductance because in my other thread, someone recommend the inductance should be in the order of millihenries.
Here's one calculator: https://rimstar.org/science_electronics_projects/coil_design_inductance.htm
If a rod has a permeability of 20, then I'll need to make a lot of turns in my coil to achieve millihenries inductance.
If all other parameters are the same and permeability is a high number, then the inductance may even reach henries.
I'm looking at a bunch of rods to buy from ebay due to their price and some sellers suggested some are used for radio.
I could also visit a store but they could charge me alot of money just for a single rod.
Is there a way to identify a permeability of a rod?
Here's one calculator: https://rimstar.org/science_electronics_projects/coil_design_inductance.htm
If a rod has a permeability of 20, then I'll need to make a lot of turns in my coil to achieve millihenries inductance.
If all other parameters are the same and permeability is a high number, then the inductance may even reach henries.
I'm looking at a bunch of rods to buy from ebay due to their price and some sellers suggested some are used for radio.
I could also visit a store but they could charge me alot of money just for a single rod.
Is there a way to identify a permeability of a rod?