EMI from Roku Ultra?

Many moons ago when I had DirecTV satellite television, I had two of their satellite TV receivers sitting on my stereo rack.  At that time, whenever I'd crank up the gain pretty high on my amp when spinning vinyl, I'd hear a tiny bit of feedback over my speakers.  At first, I thought this might have been EMI because the TT was too close to the amp's current supply.  So, I moved those components on the rack as far away from each other as possible.  The feedback phenomenon continued, regardless.  The next suspect became the DirecTV satellite receivers.  So, again, I moved those as far away from the TT and amp on the rack as possible.  When I eventually got rid of DirecTV (and their receivers), thankfully, this feedback issue completely disappeared.  So, I'm assuming the DirecTV satellite receivers were the culprits.  Now, I'm thinking of getting a Roku Ultra streaming device to hook up to my TV.  I can't imagine this would pose a similar problem.  However, I thought I'd shoot this out there to the audiophile community to see if any of you might have possibly experienced any problems in this regard when adding a Roku device.