FSB31-3/4, ID=3/4", RFI Range 1-300 MHz, Bulk Pack of 10

Store/Ferrite Core Products/Mix 31/Snap On - Mix 31 - RFI Range 1-300 MHz

Product Details

Initial Permeability (@ 10KHz): 1500

Material: MnZn

Max cable size - in/mm: .728/18.5

OD (A) - in/mm: 1.15/29.2

ID (B) - in/mm: .74/18.8

Length (C) - in/mm: 1.65/41.9

Z (ohms per bead - single turn 1 MHz): 16

Z (ohms per bead - single turn 5 MHz): 48

Z (ohms per bead - single turn 10 MHz): 89

Z (ohms per bead - single turn 25 MHz): 125

Z (ohms per bead - single turn 100 MHz): 220

Z ohms (per bead - single turn 250 MHz): 310

Ferrite Snap On, ID = .74 in/18.8 mm, Mix 31, Bulk pack of 10

12:1 Baluns are useful between 600-650 ohm balanced loads the impedance at the end of the feed line is 600 ohms (1/2 wavelength feed line), or high impedance feeds for rhombic, T2FD and traveling wave antennas.

12:1 Ununs are useful between coax and long wires with a load impedance near 600 ohms like a beverage antenna. Shortwave listener antennas also can benefit with the 12:1 unun and it may provide a better match than 9:1 ununs – this means quieter noise levels and stronger signals so you can hear distance stations easier.