Common-mode current choke for coax & controller cable K9AY++ manual
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Noise suppression by CMCC
Example
CMCC isolation
Insertion LOSS of CMCC
Schematic
PCB
KIT Assembling
Part list
CMCC construction
Article
Product details
Noise suppression by CMCC
Common-mode current choke (CMCC) coils work as a simple wire against differential mode current (signal), while they work as an inductor against common mode current (noise).
example of configuration with K9AY++ classic or remote version
version with PL SO-239 connector
version with F connector
Example - measure by Nils DK8OK
CMCC isolation
- for 50 Ohm RG-316 coax cable 10 turns
0.5 to 50 MHz
0.1 to 2.5 MHz
- for controller cable on small core inductors
0.5 to 50 MHz
0.1 to 2.5 MHz
Insertion LOSS of CMCC
- for 50 Ohm RG-316 coax cable 10 turns
Schematic
PCB
KIT Assembling
version with PL SO-239 connector
version with F connector
pcb after assembling all the parts
Part list
NAME | PART | VALUE |
---|---|---|
C1 - C3 | capacitor | 100uF 500V |
C4 - C8 | capacitor | 100uF 500V |
X1, X2 | RJ45 | RJ45 PCB |
CMCC1 - CMCC8 | inductor | 5mH |
core | qro.cz CMCC core | |
CON | connector | PL S0-239 or F |
CMCC construction
- common-mode current choke construction
- wind 5 to 5 turns on one side then cross to another side of the cores and wind rest turns.
Article
ℹ Read article from Chuck Counselman, W1HIS and article How Common-mode chokes work by Würth Elektronik.