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Choke Balun

918 bytes added, 23:41, 16 July 2016
/* Ferrite Chokes */
The following lines were added (+) and removed (-):
The ferrite choke has a ferrite bead or ferrite core which is a mix of material.  The mix is referred to by a number, and each mix has different impedence properties which should be used at specific frequency ranges.  An example is #43 ferrite mix, however, the mix number is not an industry standard.  Palomar makes a type 43 ferrite and Fair-Rite makes a type 43 ferrite and they are not the same.*Palomar mix #31 is for 1-10 MHz common mode suppression and acceptable for ham radio 1:1 feed line choke applications. *Palomar mix #43 is for common mode chokes from 2-300 Mhz.  *Palomar mix #61 is for high power in multi ratio (2:1, 4:1, 9:1) impedance transformers.To compare differences by manufacturer consider Palomar's type 43 material is good for attenuation from 2 MHz to 1000 MHz. Fair-Rite's type 43 is good for attenuation from 20 MHz to 300 MHz.  As you can see this is significant on the HF band. 
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