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@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
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