LED lamps are becoming cheaper by the day – and noisier. A recent study by PF0EMC and others shows the spectrum from 3 MHz to 30 MHz. The first image shows the spectrum with the LED lamp switched off, the … Continue reading Image may be NSFW.
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Image may be NSFW.
Clik here to view.
Clik here to view.
Image may be NSFW.Clik here to view.
