RX - Common-mode current choke for coax and controller cable

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[<-- Back to Index|Main page] | [<-- Web page|https://remoteqth.com/commonmode-ctrl.php] ---- *[NEW MANUAL REVISION FOR UNIVERSAL THERE|https://hamparts.shop/blog/common-mode-current-choke-for-coax-controller-cable-universal-manual.html] *[NEW MANUAL REVISION FOR K9AY++ THERE|https://hamparts.shop/blog/common-mode-current-choke-for-coax-controller-cable-k9ay-manual.html] rev. 1.0 11/2020 by Jan OK2ZAW ''' There are two version: K9AY++ and universal ''' * Example for K9AY++ [https://remoteqth.com/img/ZAW-WIKI/cmcc/crtl_cable/k9ay_ctrl_cmcc_ctrl_850.jpg|noborder] !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|https://remoteqth.com/img/ZAW-WIKI/cmcc/CommonModeChokesW1HIS.pdf] How Common Mode Chokes Work by [Würth Elektronik|https://www.we-online.com/web/en/passive_components_custom_magnetics/blog_pbcm/blog_detail_electronics_in_action_61439.php] !Example [https://remoteqth.com/img/ZAW-WIKI/cmcc/dk8ok_MW999_850.png|noborder] !Common-mode current isolation for coax - for 50 Ohm RG-316 coax cable 10 turns * [bigger pic 1 to 50 MHz|https://remoteqth.com/img/ZAW-WIKI/cmcc/5+5.png] * [bigger pic 0,1 to 2,5 MHz|https://remoteqth.com/img/ZAW-WIKI/cmcc/0,1to2,5.png] [https://remoteqth.com/img/ZAW-WIKI/cmcc/5+5-850.png|noborder] [https://remoteqth.com/img/ZAW-WIKI/cmcc/850-0,1to2,5.png|noborder] !Insert LOSS of Common-mode current choke (CMCC) - for 50 Ohm RG-316 coax cable 10 turns * [bigger pic|https://remoteqth.com/img/ZAW-WIKI/cmcc/IL.png] [https://remoteqth.com/img/ZAW-WIKI/cmcc/IL-850.png|noborder] !Common-mode current isolation for controller cable - on small core inductors [bigger pic 0,5 to 50 MHz|https://remoteqth.com/img/ZAW-WIKI/cmcc/crtl_cable/ctrl_0,5-50.png] [https://remoteqth.com/img/ZAW-WIKI/cmcc/crtl_cable/ctrl_0,5-50_850.png] [bigger pic 0,1 to 2,5 MHz|https://remoteqth.com/img/ZAW-WIKI/cmcc/crtl_cable/ctrl_0,1-2,5.png] [https://remoteqth.com/img/ZAW-WIKI/cmcc/crtl_cable/ctrl_0,1-2,5_850.png] !KIT !! Schematic and board [bigger - CMCC+CTRL universal|https://remoteqth.com/img/ZAW-WIKI/cmcc/crtl_cable/cmcc_uni_ver01.jpg] [https://remoteqth.com/img/ZAW-WIKI/cmcc/crtl_cable/cmcc_uni_ver01_850.jpg] [https://remoteqth.com/img/ZAW-WIKI/cmcc/crtl_cable/brd_v1.0_universal.png] [bigger - CMCC+CTRL for K9AY++|https://remoteqth.com/img/ZAW-WIKI/cmcc/crtl_cable/cmcc_k9ay_ver01.jpg] [https://remoteqth.com/img/ZAW-WIKI/cmcc/crtl_cable/cmcc_k9ay_ver01_850.jpg] [https://remoteqth.com/img/ZAW-WIKI/cmcc/crtl_cable/brd_v1.0_k9.png] !! KIT assembling *SO-239 connector [https://remoteqth.com/img/ZAW-WIKI/cmcc/crtl_cable/cmcc_ctrl_kit_k9_pl_box_850.jpg|noborder] * F connector [https://remoteqth.com/img/ZAW-WIKI/cmcc/crtl_cable/cmcc_ctrl_kit_k9_f_box_850.jpg|noborder] *SO-239 connector [https://remoteqth.com/img/ZAW-WIKI/cmcc/crtl_cable/cmcc_ctrl_kit_uni_pl_box_850.jpg|noborder] * F connector [https://remoteqth.com/img/ZAW-WIKI/cmcc/crtl_cable/cmcc_ctrl_kit_uni_f_box_850.jpg|noborder] !Drilling [https://remoteqth.com/img/ZAW-WIKI/cmcc/1-2_2_850.jpg|noborder] [https://remoteqth.com/img/ZAW-WIKI/cmcc/1-3_2_850.jpg|noborder] [https://remoteqth.com/img/ZAW-WIKI/cmcc/1f_2_850.jpg|noborder] [https://remoteqth.com/img/ZAW-WIKI/cmcc/1f1_2_850.jpg|noborder] !!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. [https://remoteqth.com/img/ZAW-WIKI/4-way/5.jpg|noborder] [https://remoteqth.com/img/ZAW-WIKI/4-way/6.jpg|noborder] [https://remoteqth.com/img/ZAW-WIKI/4-way/7.jpg|noborder]