Re: [TowerTalk] Common-mode choke

[Jim Brown <jim@audiosystemsgroup.com>]

On 5/19/2014 6:19 PM, Jim Thomson wrote:
> use 2 foot of the large diam type 43 beads  slid over  213u  or  393 coax.
Sorry, Jim, but string of bead chokes using #31 or #43 simply are not 
very effective on the HF bands because their resonance is at VHF, and 
their resistive component at HF is very low. Study k9yc.com/RFI-Ham.pdf 
to understand why resistance is good and inductive reactance is bad.
73, Jim K9YC
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