radio interference on a hardwire

Discussion in 'Media Production' started by envisaging, Feb 17, 2008.

  1. envisaging

    envisaging Guest

    I just encountered a problem on set where I was getting a very loud radio station on a hardwired microphone.

    Any clues on how to avoid in the future?
     
  2. for-a-song

    for-a-song Guest

    All. your cables balanced and shielded? Maybe a pin 1 prob in a piece of gear or look for any other lines running close your your connectors.

    Could try to throw a line conditioner in front of your gear as well or maybe some iso plugs.

    Hope this helps.
     
  3. Boswell

    Boswell Moderator Has Studio Services

    Joined:
    Apr 19, 2006
    Likes Received:
    57
    Location:
    UK
    A while back I made a set of in-line XLR interference suppressors for just this sort of problem. I haven't got one here at the moment to look inside, but if I remember correctly I put series absorption ferrites at the signal input and common-mode ferrites at the output. Between the two sets of ferrites were delta capacitors to shunt residual r.f. to ground (shell, not pin 1). Since making the suppressors, I have never encountered an r.f. problem that they did not knock on the head.

    Something to check first, though, is that XLR pin 1 on the microphone does actually connect to the microphone body and that pin 1 really is grounded at the pre-amp.
     
  4. bent

    bent Guest

    Did you try simply swapping the cable?

    Sometimes the easiest fixes are the most often overlooked.
     
Similar Threads: radio interference
Forum Title Date
Hybrid Mixing, Summing Forums Radio Freq. or Electromagnetic Interference, any solutions? Jun 26, 2007
Music Business Forum Calgary radio station cuts songs in half to appeal to short attention spans Aug 8, 2014
Song & Mix Collaboration Am Radio Mix help Jun 11, 2014
Music Business Forum Contact list for promotion - gigs & radio airplay in Japan Apr 19, 2014