You are MUST READ, Jim. Thank you for your contributing your wisdom on this topic.
David A., KK6DA, LA > On Feb 28, 2016, at 2:03 PM, Jim Brown <[email protected]> wrote: > > On Sun,2/28/2016 11:24 AM, David Ahrendts wrote: >> Just replaced an older circa 2012 Apple Time Capsule with a new Airport >> Extreme in my home gigabit network. And in the category of “it’s always >> something,” I discover that the AEX powers down with my K3S/KPA500 at 500 >> watts. Just shits off. Admittedly, they sit just feet away from each other, >> but care is taken to separate RF lines from audio lines and network lines. >> The newer AEX introduces Apple’s 802.11ac protocol. Any guesses? > > First, take it back and get your money, and tell them why. > > Second, if you decide not to do that, carefully choke all of the cables > connected to it, following the guidelines in k9yc.com/RFI-Ham.pdf for ferrite > common mode chokes for the ham bands where there is a problem. > > Proximity between transmitter and the box doesn't matter -- transmitters > themselves don't radiate. What matters is proximity to ANTENNAS -- that's > what radiates. The cables connected to the Apple box can act as both TX and > RX antennas, including the power supply, which itself can be a powerful noise > source. > > Also, be sure to listen for RF trash. The good news is that the chokes you > install to protect the unit will also reduce trash radiated by those cables > from the unit (and from the power supply). > > 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] David Ahrendts [email protected] ______________________________________________________________ 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]
