No Spam (ckh) wrote:

I have an S9+ noise level on all the HF bands. I've suspected my
computers, fluorescent lamps, BPL, but I'm not certain. It
sounds/looks like this.

I've turned off all the computers and other appliances, alarm
clocks, etc. There is no change in the noise.

Don't overlook a UPS...my APC makes garbage at periodic intervals across
the band, varies with input voltage

-Bill