Anyone experiencing 60hz hum from fluorescent tubes or CFL bulbs?

Videomaker – Learn video production and editing, camera reviews Forums General Video and Film Discussion Anyone experiencing 60hz hum from fluorescent tubes or CFL bulbs?

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    • #50605

      When too close to some of our wired mics, we sometimes experience hum in the audio track from these lights. While troubleshooting, we discovered replacing individual bulbs or tubes fixed the problem. Is this just our personal gremlin at work or are others having problems, too?

    • #204001
      D0n
      Participant

      not finding it to be an issue.

    • #204002
      chuckzootz
      Participant

      Been using them for a couple of years and haven’t experienced the problem either

    • #204003
      gldnears
      Member

      ” When too close to some of our wired mics, we sometimes experience hum in the audio track from these lights “

      What type of wired mics? Dynamic, ribbon, and some condenser mics have coils or transformers in em into which hum can be induced by any device which also has a transformer or coil, running on 60Hz ( or 50Hz ) power. If the mic is not picking up the induced field, the mic cable can in some cases if it is not a truely balanced circuit. The trend away from input transformers in micpreamps ( too expensive and heavy) toward electronic, differential inputs can also be susceptable to induced hum unless it involves some sophisticated circuitry ( not found in low-cost micpreamps ). I think it’s safe to say that just because a camera may have an XLR mic input, it is no guarantee the the mic preamp is a high quality, well-balanced input stage.

      Rick Crampton

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