[net.ham-radio] HPS streetlights can cause RFI

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