los@vmsint.DEC (Edward J. Los) (02/04/86)
I found that high pressure sodium streetlights have a failure mode in which they periodically extinguish and reignite. Just before reignition, they cause severe RFI on 80m. If you are having troubles with periodic QRN on 80m, you may want to check the streetlights in your neighborhood. In my case, one lamp was cycling every 60 seconds before I had the utility replace it. Ed, KB1JG