You may find these additional resources helpful when searching for the sources of RFI in your shack:
PRESENTATONS
Pasadena Radio Club Presentation by LAX RFI Team
https://nediv.arrl.org/wp-content/uploads/2022/03/RFI-in-the-City_Pasadena_Radio_Club_5-ver-6.pdf
POWERLINE NOISE HUNTING
Kiefer, Richard, K0DK. “Finding and Fixing Power Line Noise.” QST, September 2021 pp. 34-38.
ARRL RFI webpage: http://www.arrl.org/radio-frequency-interference-rfi
ARRL Powerline Noise webpage: http://www.arrl.org/power-line
ULTRASONIC PLN DETECTOR: http://www.arrl.org/files/file/Technology/PLN/Ultrasonic_Pinpointer.pdf
3-ELE VHF TAPE MEASURE BEAM: http://www.arrl.org/files/file/Technology/HANDSON.pdf
5-ELE UHF HANDHELD BEAM http://www.arrowantennas.com/arrowii/440-5ii.html
RFI NOISE HUNTING:
http://www.arrl.org/files/file/RFI/FOESTER.PDF
http://www.arrl.org/files/file/RFI/Thompson%20Noise.pdf
http://www.arrl.org/files/file/Technology/pdf/ExternalNoiseHandbook.pdf
RFI@contesting.com (mail list devoted to RFI mitigation): http://www.contesting.com/FAQ/rf