Which Ethernet switch causes the least HF noise?

In this video I test out 4 Ethernet switches to find out which one causes the least amount of noise on HF.

[conorturton]

I'd be looking more at your RF grounding at your antenna. You should only get interference from the proximity of the network cable to the coax if you've common mode RFI which is a result of the coax being used to compensate for a poor or non-existent RF ground. That's because the wanted RF is on the inside of the coax braid so shielded from interference. When you have common mode RFI it's because you have RF flowing on the outside of the braid and it's susceptible to interference. Common mode RFI doesn't just happen when you transmit, it happens on receive to.

I would bet that if you were to put a RF choke (several windings of your coax through a FT240-31 or FT240-43 toroid) at the radio end of the coax to choke off the common mode RFI from the radio you'd see those signals attenuated massively if not completely.

Also look at putting Mix 31 or 43 ferrites on the network cables and the power cable for the switch too.

[reidlanham]

Could it possibly be the wall warts and not the actual ethernet switches?