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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).

effect of common-mode current choke cmcc by qro.cz hamparts.shop



example of configuration with K9AY++ classic or remote version

example of configuration common-mode current choke controller with k9ay++ by qro.cz hamparts.shop



version with PL SO-239 connector

assembled common-mode current choke cmcc controller cable by  pl so-239 qro.cz hamparts.shop



version with F connector

assembled common-mode current choke cmcc controller cable by qro.cz hamparts.shop


Example - measure by Nils DK8OK

common-mode current choke cmcc qro.cz hamparts.shop




CMCC isolation

- for 50 Ohm RG-316 coax cable 10 turns

0.5 to 50 MHz

measurement common-mode current choke cmcc qro.cz hamparts.shop

0.1 to 2.5 MHz

measurement common-mode current choke cmcc qro.cz hamparts.shop

- for controller cable on small core inductors

0.5 to 50 MHz

measurement common-mode current choke cmcc qro.cz hamparts.shop

0.1 to 2.5 MHz

measurement common-mode current choke cmcc qro.cz hamparts.shop


Insertion LOSS of CMCC

- for 50 Ohm RG-316 coax cable 10 turns



common-mode current choke cmcc qro.cz hamparts.shop

Schematic

schematic common-mode current choke cmcc controller cable by qro.cz hamparts.shop

PCB

pcb common-mode current choke cmcc controller cable by qro.cz hamparts.shop

KIT Assembling

version with PL SO-239 connector

common-mode current choke cmcc controller cable by qro.cz hamparts.shop



version with F connector

common-mode current choke cmcc controller k9ay by qro.cz hamparts.shop

pcb after assembling all the parts

common mode current choke cmcc controller k9ay by qro.cz hamparts.shop


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.

common-mode current choke cmcc qro.cz hamparts.shop



common-mode current choke cmcc qro.cz hamparts.shop



common-mode current choke cmcc qro.cz hamparts.shop




Article

   Read article from Chuck Counselman, W1HIS and article How Common-mode chokes work by Würth Elektronik.




Product details

Included in package

CMCC ctrl assembled and tested

Box dimensions (mm) 100x100x50 mm - PU box IP56
Weight brutto (kg) 0.4 to 0.44 kg

Manufacturer:

Ing. Jan Šustr
ID 05476356, VAT CZ8407024780
Palachova 1777/7, 591 01 Žďár nad Sázavou, Czech republic, Europe

General instructions:

Please also read general instructions before handling the product.

European Union Declaration of Conformity

Manufacturer Ing. Jan Šustr (QRO.cz):

ID 05476356, VAT CZ8407024780
Palachova 1777/7, 591 01 Žďár nad Sázavou, Czech republic, Europe

declares that the assembled product:

CMCC CTRL K9AY++

is compatible with the relevant Union harmonisation legislation directives:
EMC Directive 2014/30/EU
ČSN EN 61000-6-3 ed. 2
ČSN EN 61000-6-1 ed. 2 (333432)

On behalf of Ing. Jan Šustr (QRO.cz)
Ing. Jan Šustr, CEO
1st January 2023

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