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Locating RF Interference at HF
www.arrl.orgA free program, Audacity, will enable you to make an excellent audio recording from your receiver audio output. 3 Finding the RFI Source Once you have an idea of what might be causing the RFI problem, you still need to find the source. Figure 1 shows a block diagram of the HF RDF system that I use. Grow light RFI is often prevalent in the