Hi

i'm looking for a ferrite bead that will block 1-20 Mhz
frequancies and pass all lower ones

is it possible ?

can someone to advice me for one specific?

Best regards,
Arye

 

block around 10 Mhz is good enough

 

You're probably going to need more than just a ferrite bead.

Check out Amidon's specifications page on their website:
https://www.amidoncorp.com/pages/specifications
Under Ferrite Material, look at:
2-14 Ferrite Beads https://www.amidoncorp.com/specs/2-14.pdf
2-15 Beads: Material vs Freq. vs Impedance https://www.amidoncorp.com/specs/2-15.pdf
2-16 Ferrites for RFI https://www.amidoncorp.com/specs/2-16.pdf
2-17 Ferrite Cores for RFI Suppresion https://www.amidoncorp.com/specs/2-17.pdf

If you want to take a shot at designing your own filter, have a look at Elsie:
http://www.tonnesoftware.com/elsie.html
The student edition is freeware, limited to 7 poles or stages.

 

thanks a lot
Arye i'm looking at all your links

 

Welcome to AAC !!

Hope you find what you need. We have a bunch of gals and guys here that are the best there is.