[TowerTalk] 4 square for 80

[Wes Stewart]

The beads described earlier appear to be Fair-Rite Products P/N 2643800302.

Judging by the chart 
http://www.fair-rite.com/product/round-cable-emi-suppression-cores-2643800302/ 
the impedance of these at 3.5 MHz is in the neighborhood of 5-6 Ohm.  One 
hundred of them would be around 500-600 Ohm.  Is this enough for the purpose? 
Maybe.  Would they be okay at the feedpoint of a dipole? Probably not.

Wes  N7WS


On 1/27/2017 8:47 PM, Jim Brown wrote:
> On Fri,1/27/2017 6:32 PM, john at kk9a.com wrote:
>>   The only
>> commercial product that I am aware of uses 100 #43 beads:
>> www.dxengineering.com/parts/com-cfc-75 
>
> The fact that someone is selling something does not make it a good idea, nor 
> does it change the laws of physics. :)
>
> W2DU's string of beads chokes were a good idea because their impedance was 
> resistive in the frequency range where they would be used. The limitation was 
> (and still is) that the largest bead made with that material (#73) is just 
> large enough to fit coax the size of RG58.
>
> 73, Jim K9YC