[RFI] Garage Door RFI

[Gary K9GS]

Hello Jim,I had a very similar problem that I discovered while working from home during the COVID-19 lockdown.My driveway is about 150 feet long and I was always able to operate the garage door opener from my mailbox.  All of a sudden both my wife and I noticed that we had to be right in front of the garage door to trigger the garage door opener. The first thing I did was change batteries in the opener remote. No difference. I started thinking what has changed and I figured out that it was my work laptop power supply.  My temporary work at home office is in my dining room which is on the other side of the wall from my garage. When I unplugged the laptop power supply the problem went away.Laptop is a Dell Latitude series.According to the garage door opener manufacturer, their remotes operate at 318 mHZ.73,Gary K9GS
-------- Original message --------From: Jim McCook <w6ya at cox.net> Date: 6/12/20  8:37 AM  (GMT-06:00) To: RFI List <rfi at contesting.com> Subject: [RFI] Garage Door RFI For years I've easily opened my garage door with the car's remote system from 400 ft. away.  A few weeks ago I noticed that was no longer possible.  Even from my own driveway it was often hard to open it.  I had installed a couple of 11w LED bulbs in the main motor unit.  I had no concern, since I have 35 Cree LED floods in my house that do not create noise beyond a few inches.  This was different.  Those bulbs generated noise in the 300Mhz spectrum that interfered with the reception from the remote.  Replacing them with 23w CFL lights solved the problem. Beware of LED lights in a garage door opener!!!_______________________________________________RFI mailing listRFI at contesting.comhttp://lists.contesting.com/mailman/listinfo/rfi