Ferrite core

[9M6BZ]

Trying to built balun say 4:1 for my ocf windom But no sure what of ferrite spec to use.understand there are quite a number spec. So anyone out there please if you would help me understand more of these ferrite for use with building a 4:1 Balun...
Thanks

De: 9M6BZ

[W9GB]

FOR EXAMPLE:

Torroid core with part numbering : F-23-43

F = Ferrite Toroidal
23 = O.D. Dimension (Physical size of the core)
43 = Material Type or Mix (suitable freqeuncy range)

FULL Specfications (CWS ByteMark page) -- include the following characterisitics:

AL( nH/Sq Turn) is the Al value. Required turn = square root of ( desired 'L' in nH / 'AL' in nh/Sq Turn)
CWS ByteMark Part Number is the part number to use to place your purchase order
O.D. is the outer diameter of the toroid core
I.D. is the inside diameter of the toroid core
Height is the height of the toroid core
Material is the Ferrite material designator where you can look up its properties at www.bytemark.com
Permeability is the Permeability of the materials


CWS ByteMark - one supplier
http://www.cwsbytemark.com/index.php...&cPath=206_221

Fair-Rite Products --- Iron and Ferrite Cores
http://www.fair-rite.com/newfair/index.htm

It is always a good idea to LOOK at commercial products ... IF you are new to DIY Building.
BALUN DESIGNS is one commercial company
http://www.balundesigns.com/servlet/...uns/Categories

KNOW (and see) the difference in QUALITY construction ---
there are a number of COPY-CAT companies (no R&D or Quality Control)
http://www.balundesigns.com/servlet/...late/Test/Page

W8JI - Off-Center Fed (OCF) Dipole - Windom
http://www.w8ji.com/windom_off_center_fed.htm

W8JI - 4:1 Balun Design & Operation
http://www.w8ji.com/balun_single_core_41_analysis.htm

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