Colorado Ham Tracks Down, Resolves Interference from Pot Cultivators’ “Grow Lights”

The ARRL already has complained to the FCC that so-called “grow light” ballasts can generate severe interference on the HF bands. According to a recent article in The Coloradoan, retired electrical engineer Tom Thompson, W0IVJ, first noticed interference on 40 meters at his location in Boulder a couple of years ago. So, he coupled his own portable receiving loop with a direct-conversion receive…

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