Common-mode current choke CMCC for coax and controller cable
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). This box is designed as a common-mode filter for RF cable and also for analog AC/DC controller wires. One of this version is directly designed for K9AY++ antenna system, second one is Universal..
Main functions:
Common-Mode Current insulator High curren insulation Coax impedance 50 or 75 Ohm Controller (analog) wires insulator
Good quality PTFE coax cable Low insert loss - Quality PTFE SO-239 or N connector or F.
Using:
Common-mode filter for coax and controller cable Any devices with RF cable and controller cable (AC/DC) One of this model directly works with K9AY++ antenna system link
Parameters:
- Info:
- Control cable voltage up to 100 V DC / AC
- Maximal current on wire up to 300 mA
- Version K9AY++ 7 wires + GND (schematic)
- Universal version 8 wires + GND only shield (schematic)
Variants:
Version for K9AY++ RX antenna system link Universal version all wires can be use
The measured values
 Coax: CM current insulation - 1 to 50 MHz |
 Coax: CM current insulation - 0,1 to 2,5 MHz |
 CTRL cable: CM current insulation - 0,1 to 2,5 MHz |
 CTRL cable: CM current insulation - 0,5 to 50 MHz |
 Insert loss |
Download
| Common-mode coax + control cable choke | ||||
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| Version for K9AY++ antenna system | sch  |
pcb  |
KiCAD211 | |
| Universal version | sch  |
pcb  |
KiCAD226 | |
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We believe open source is a better way of doing things. View and download the Shield Schematic and PCB Kicad/Eagle CAD files, LibreCAD .DXF, or Inkscape .SVG files. The hardware designs are released under the Attribution-NonCommercial 2.0 Generic |
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Pictures from the users:
 Thanks to Nils DK8OK: 30 MHz |
 Thanks to Nils DK8OK: 540 kHz |
 Thanks to Nils DK8OK: 1521 kHz |
 Thanks to Nils DK8OK: 4,92 MHz |
 Thanks to Nils DK8OK: 999 kHz |
Related products:
 RX coax match & limiter & CMCC |
 RX protection limiter with CMCC in box |
 RX protection limiter with CMCC module |
 Common-mode RX filters |
 small RX preamp |
 7ANT RX switch |
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