[TowerTalk] Snap-on Ferrites

[Jim Thomson]

Large type 31 snap on is 2 OD x 1 ID  x 1.5 long, which is the same as their  solid assy, also 2x1x1.5 

Normal  solid  2x1x1.5 type 31 is http://www.fair-rite.com/product/round-cable-emi-suppression-cores-2631626202/

Large  type 31 snap on is http://www.fair-rite.com/product/round-cable-snap-its-431177081/

Both the solid 2 x 1 x 1.5  and also the large snap it  2 x 1 x 1.5 have IDENTICAL choking specs at at all freqs. 


On a side note,  3 of the 2.4 x 1.4 x .5  cores... in a stack has LESS  choking Z than either of the 2 x 1 x 1.5  versions. 
Not a lot, but the 2 x  1 x 1.5  versions are  both 13.75 % more than  3 of the 2.4 OD cores.  


2.4 x 1.4 x .5  type 31 is   http://www.fair-rite.com/product/round-cable-emi-suppression-cores-2631803802/

As long as the large snap it is closed correctly, then either ty-rapped or taped...or both,  its all a moot point.  

I didnt read the article, but obviously the large snap it, in type 31,  could be opened up, and  several turns of
whatever, as long as it fits the smallish 1 ID  hole..and closes, will work. 

The 2.4 x 1.4 x .5  with its  bigger 1.4 ID would take a connector.   The even bigger   4 x 3 x 1 type 31
 http://www.fair-rite.com/product/round-cable-emi-suppression-cores-2631814002/    with its huge
3 inch ID  would handle any connector, like 120 vac plugs etc  you could stuff several turns around it.

Jim  VE7RF