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Eliminating PoE interference (lemmy.radio)

submitted 3 weeks ago by early_riser@lemmy.radio to c/amateur_radio@lemmy.radio

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I have an Ethernet cable running PoE+ to a wifi access point outside my shack that is very close to my radios. It exhibits the typical QRM pattern, with birdies at regular intervals making a warbling sound when the rig is on SSB.

I've eliminated this problem before using chokes, but this cable is thicker (meant for outdoor use) and much closer, it runs along the same cable runway as my antenna feedlines.

I'm pretty sure the cable isn't shielded. I just bought the cheapest thing I could find on Amazon. I wouldn't trust it if it did say it was shielded. Anyway, would getting a higher category of cable help the issue? Should I try choking the cable at a different point? I did it at the switch end, not the AP end.

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[–] shortwavesurfer@lemmy.zip 2 points 3 weeks ago (1 children)

What category of cable is it? I've heard high numbers like Cat 7 have good shielding.

[–] early_riser@lemmy.radio 2 points 3 weeks ago (1 children)

Cat6 per the listing on Amazon, but I don't trust it.

[–] cmnybo@discuss.tchncs.de 2 points 3 weeks ago

Most cat6 is unshielded. Make sure you're using shielded cat6 and shielded connectors. Check it with a multimeter to make sure there is continuity from end to end too.