The Ubiquity product uses a little power supply which includes the injector. The connections are AC line, and ethernet in/out. So to replace the power supply you’ve got a bit more of a project. Buy them from amazon. Test for noise. Return if necessary and get something else! Much easier than re-engineering a bad design.
Josh Sent from my mobile device > On Oct 22, 2019, at 1:09 PM, Jim Brown <[email protected]> wrote: > >> On 10/22/2019 12:56 PM, Joe Subich, W4TV wrote: >> The typical source of noise with PoE is from the switching supply - >> either connected to a power injector or in some terminal device >> (e.g. Router/Modem) with the Ethernet cable acting as the antenna. >> Common mode chokes on the Ethernet cable as close to the device as >> possible should help but experimentation (and replacing the noisy >> power supply) will probably be necessary. > > If that is the ONLY source, it might be better to replace it with a linear > supply of suitable current rating. I wouldn't be certain that it is the only > source -- perhaps there's some power conversion happening at the unit (that > is, up on the pole), in which case a choke there would also be required. > > But that doesn't answer the key question I asked Bill -- is the system noisy > or not. > > 73, Jim K9YC > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
