To locate the noise source, you’ll need some tools. This short video explains how to build a simple non-resonant direction finding (DF) antenna.
It would also be useful to have a broadband receiver covering 100KHz to 1GHz, for example the ICOM T90A or Yaesu VX-2. As always, don’t forget to make notes as you carry out your detective work. A small recording device, such as any modern mobile phone will also be invaluable in collecting evidence (videos and photos – all time stamped).
You can purchase a DF Loop Kit here.