RX - Common-mode current choke

This revision is from 2019/09/16 20:43. You can Restore it.

rev. 1.0 5/2018 by Jan OK2ZAW

Noise Suppression by Common Mode Choke Coils

Common mode choke coils work as a simple wire against differential mode current (signal), while they work as an inductor against common mode current (noise).

Great article from Chuck Counselman, W1HIS

How Common Mode Chokes Work by Würth Elektronik

Example

Common-mode current isolation

- for 50 Ohm RG-316 coax cable 10 turns

bigger pic 1 to 50 MHz
bigger pic 0,1 to 2,5 MHz

Insert LOSS of Common-mode current choke (CMCC)

- for 50 Ohm RG-316 coax cable 10 turns

bigger pic

KIT

SO-239 connector

F connector

Drilling

Common mode current choke

Common mode current choke construction
Wind 5 to 5 turns on one side than cross to another side of cores and wind rest turns.