Hi Kurt!   
      
   07 Aug 2017 08:55, from Kurt Weiske -> All:   
      
    KW> I read that powerline ethernet adapters can cause serious interference   
    KW> in some bands, and I've noticed a lot of RF hum on my shortwave radio.   
      
    KW> Does anyone here have any experience with SW/HAM radio and powerline   
    KW> adapters to confirm?   
      
   I think modern PLC standards notch out HAM frequencies.   
   A very quick google search did not find any good reading material ...   
      
   A PLC manufacturer wrote this (has to be taken with a grain of salt):   
   Does powerline interfere with HAM radio signals?   
      
   By using OFDM (orthogonal frequency division multiplexing), we create   
   different interleaved channels or carrier frequencies (up to 1155) that can be   
   transmitted on. We can also tune these channels to make sure they don't   
   interfere with other RF signals - like Amateur Ham Radio operators - in   
   effect, notching out those frequencies from use (effectively using only 917 of   
   the 1155). This reduces overall throughput, but ensures that we don't impact   
   HAM Radio communications.   
      
   I assume that faulty/crappy switching power supplies can also lead to that.   
      
   CU, Ricsi   
      
   --- GoldED+/LNX   
    * Origin: Practice what you preach (2:310/31)