Snap On Sleeve Choke - 1/2"/12.7mm cable -5/10/15 bead options, 1-300 Mhz
Use for 1/2″ Cable – RG8, RG213, LMR-400, etc.
For 1/2” cables use five split beads
for 80-10 meters (3-30 MHz) or
ten split beads for 160-10 (1.8-30 MHz) meters or use 15 for even higher choking for 1-10 MHz.
Typical Impedance per split bead: 10 Mhz: 90 ohms, 25 Mhz: 156 ohms, 100 Mhz: 250 ohms, 250 Mhz: 305 ohms
A minimum impedance of 500 ohms is needed for 50 ohm cable or 10 times the cable impedance for other cables.
The beads clamp to the cable and may be operated
as is for indoor use. However, it is strongly suggested that they be
covered to protect the plastic covers from weathering – use electrical
tape for best results or heat shrink to ensure longer life. All kits
come with instruction manual which covers assembly and application tips.
As you can see from the impedance vs frequency graph, you can very effectively increase the choking impedance by increasing the number of beads on the cable.
Note: Ferrite beads may be hexagonal or square shape depending on inventory on hand at time of order.