HF Noise

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HF noise. Suburban area; not coming from my house. Panadapters at 5.3 MHz; upper narrow band, lower wide band. Seems to be harmonically related in groups of 4. Spectral shape is identical. Pollutes through 10 MHz. Constant day or night, with about +/- 2 KHz drift.
  1. Louis Brown
  2. Amateur Radio (Hobby)
  3. High Frequency
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