FT140-77, ID=.9", RFI Range .1-10 MHz
Product Details
MPN: F140-77
RFI Range (MHz): 100 KHz-10 Mhz
ID-B (in/mm): .9/23
OD-A (in/mm): 1.4/35.6
Height-C (in/mm): .5/12.7
Weight (oz/gm): 33 grams
Initial permeability: 2000
A(L): 2250
Ferrite Ring Toroid Core, ID = .9"/23mm, Mix 77. Excellent for low frequency switching power supplies. RFI range .1-50 MHz.
Also make sure you connect a good RF ground to the transceiver ground post.
Note to Flex Radio users: Use snap on ferrites for firewire cable, speaker cable and mic cable, Ring ferrites for Antenna output and DC power.
For additional RFI suppression, use a feed line choke at the antenna to suppress common current on the coax feed line – see our store for feed line choke alternatives for use at the antenna.
If you use a linear amplifier we have RFI kits for linear amplifiers that help suppress RFI in your shack or in your neighbor’s house.