David Mulvey - KD6BZN Noise Page

ARRL - The Issue of Power-Line Noise
Power Line Noise
Radiated and Conducted Noise

It is happening again

April 3, 2022 - Noise seems to be triggered by wind. I assume pressure is being applied to broken insulators and causing micro-arching.

Feb 20, 2022 - Noise from SCE mostly, although it generally goes away at night, SMPS noise turns on from 2027 Minford St., and probably many other sources of low level SMPS, but in this video, mostly SCE.

Noise reference videos demonstrating a quiet day (12-18-21) without the usual noise from the Electric Company. Yes, there are other noises, but very tolerable on this rare day.

Noise Source Azimuth 180 degrees. Captured on a Tektronix 6120a Real Time Spectrum Analyzer using the zero-span mode of the DPX view. MR to M1 = 8.25msec. 1/0.00825 = 121 Hz. This probably means the source signal is a 60 Hz line, because the arcing occurs twice in one wavelength, once at the top of the cycle, and again at the bottom of the cycle. This means it's probably arcing on SCE's equipment.

If this were a switching mode power supply, the group of pulses would be much closer together in time.

PRF within the pulse group was more random, but generally 0.1 to 1 msec.

Here is a different noise source (Azimuth ~ 65 degrees), but there are actually two sources shown here.
I see in red AC voltage arcing (electric company)
I think this might be a switch mode power supply in yellow

Now three sources (180, 65?, unknown?)

June 29th, 2020, the RTVI crew came out and located the source I called about located at pole #4694516E.
While they were searching, I did located an azimuth direction of another noise source.
The noise had a different signature today, getting worse. Instead of 3 or 4 pulses @ 120 Hz, it's more like 10 to 20.

They found and wrote the noise marked in red.
They didn't have time to look for the yellow @ 115 degrees azimuth.
And the green was new and wierd, @ 160 degrees azimuth.

FYI: I've disabled You tube’s default tracking of visitors to this page by creating an embedded website link using the "No-cookie" option, but if you play the video, YouTube will track it. Since the content is relatively politically neutral, I don't think it matters much. If you have suggestions, I guess leave a comment, I might see it, maybe.

Video... Watch how the lines I marked in green above move back and forth. It's wierd and I don't know what it is.

Noise from my new Tripp-Lite UPS during normal operation. Noise goes away during the Test operation (which means the Battery momentarily does not charge, because the AC input is interupted). Update: Gave the Tripp-Lite away after getting nowhere with the manufacturer, and bought a queit Cyber-Power 1500.