V
VK3YNV
Guest
Here is a video describing a fairly simple method to identify the ferrite type for an unknown core. It works by measuring the magnetic permeability and comparing with the data on the FairRite web site.
The spreadsheet is here https://www.fairrite.com/wpcontent/uploads/2020/05/ToroidandRodPermCalc003.xls
Might be handy if like me you have ferrite toroids of unknown origin and properties.
Edit: I have added XLS to the accepted file types, so I've attached the spreadsheet.
The spreadsheet is here https://www.fairrite.com/wpcontent/uploads/2020/05/ToroidandRodPermCalc003.xls
Might be handy if like me you have ferrite toroids of unknown origin and properties.
Edit: I have added XLS to the accepted file types, so I've attached the spreadsheet.
Attachments

472 KB Views: 23
Last edited by a moderator: