Topband: Common mode filters...help

[VE6WZ]

For feeding my Beverages and Flags I have always used a stack of about =
50 to 60, FB73-2401 ferrite beads on the RG-58 at the feedpoint to act =
as a common mode filter. (I also wind isolated matching transformers).

Question: This seems to be simply an RF choke on the shield of the coax =
(same as winding the coax into a loop).....therefore, would it not =
accomplish the same thing to just wind a high impedance RF choke on a =
toroid and insert it at the feedpoint between the coax shield and the =
antenna?  This would be easier and cheaper than all those beads. Am I =
missing something?

de Steve VE6WZ.


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