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update CMC draft

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Dominic Reich 2024-03-09 19:54:12 +01:00
parent 09e0577225
commit 878c310079
Signed by: dominic
GPG key ID: BC9D6AE1A3BE169A
1 changed files with 11 additions and 4 deletions
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content/equipment/accessories/homebrew-common-mode-choke/index.md
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@ -23,10 +23,17 @@ draft: true
---
I've built myself a common mode choke last winter (2022) but haven't created
this page yet. Also I haven't used it much because I haven't been very active
this year.
So this is basically a 140-43 toroid with 9 turns of RG174 connected to
BNC connectors.
It works very well and I have made two measurements recently.
{{< figure src="logmag_through.png" caption="The maximum loss is on 10m around 0.2dB" >}}
{{< figure src="logmag_outer.png" caption="It attenuates common mode current with more than 20dB" >}}
I find this okay for now but I still wonder if this can be made any better
(maybe 30dB attenuation?). Would I benefit from even more attenuation?
I will probably find out on another day.