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Radio stations coming thru my amp?

Discussion in 'Amps and Cabs [BG]' started by sleevey55, Feb 3, 2013.

  1. sleevey55

    sleevey55 Supporting Member

    Nov 21, 2009
    Billings Montana
    Why in the heck am I hearing the local radio stations through my setup? Its very faint but I can hear one of our local FM stations when I turn my amp on and plug my bass in. I know the mushrooms on my pizza tonite were ok sooooo???
  2. i don't know, but i have experienced the same thing.

    when my son plays either his THD or his acoustic B450 at home, no problem.

    but when he goes to practice with his band, and we use the THD for a pre-amp, the radio station comes thru big time. when he just plays through the acoustic, again, no problem.

    i am not sure why this happens, but i bet if you played at a different location, it would not happen...there just seems to be a radio tower close by the house where he practices and something in the THD's circuitry allows this.

  3. wcriley


    Apr 5, 2010
    Western PA
    Combination of inadequate shielding somewhere in the signal chain and being too close to a transmitter.
  4. WingKL


    May 12, 2007
    Try using a short patch cable, a different instrument cable or even your wireless to see if that helps. If it does, it means your cable is not well shielded.
  5. loopee

    loopee Supporting Member

    May 12, 2009
    Surrey, B.C. Canada
    ping.....lightbulb moment
    OK, I've had that happen to me a few times...I was using my Markbass combo and it was placed just a foot or so away from the wall where the plug in for internet and TV was.....when I moved the amp to the other side of the room....no more radio station coming through.....but I never really thought about it until the word "cable" on the last entry......"ping"
  6. synaesthesia


    Apr 13, 2004
    +1. When I was a teenager in the 70's we rehearsed in a studio with a Roland Studio bass amp that had a multi-band EQ, and you could 'tune' to different stations by changing the EQ settings.
  7. aasti3000


    Jul 18, 2012
    I'm also a DJ and my DJ set up at home does sometimes pick up a local station thru my amp. It's been like that since I started 20 years ago. Never could explain it. Had like a cb radio sound. haven't had that issue with my bass amp yet.
  8. It just happened to my guitar player last Wednesday. He picked up my roommates Pandora feed through his triple rec. We just shrugged it off.
  9. Do you hear the radio when the bass is not plugged in? if not, then its not the amp but poor shielding in your bass and/or cable. if you are close to a transmitter there is not much you can do.
  10. dincz


    Sep 25, 2010
    Czech Republic
    Corroded contacts can cause this. The corroded contact point acts like the detector diode in a crystal receiver.

    I remember a trainee in a TV studio who was given the job of cleaning the contacts on some plug-in audio line amps. He used sandpaper on the gold-plated contacts and some months down the track we were getting the local AM station leaking into the audio.
  11. dbase

    dbase Gold Supporting Member

    Jan 3, 2008
    South Jersey, USA..
    I usually wait for a familiar song to come along and play along with it.
  12. chadds


    Mar 18, 2000
    If its better than you or your band, why complain?
  13. fdeck

    fdeck Supporting Member Commercial User

    Mar 20, 2004
    Madison WI
    HPF Technology LLC
    Typical causes are a loose ground connection in your input signal path, possibly including dodgy solder joints at the input jack to the amp.
  14. BAce


    Jul 31, 2012
    If you are using a tube pre or an all tube amp, the lack of a grid resistor on the first stage can cause this too. Well not so much cause this but allow this. 68k resistor between the tip of the input jack and the grid of the first triode and yer done.
  15. Astreaux


    Aug 31, 2012
  16. sleevey55

    sleevey55 Supporting Member

    Nov 21, 2009
    Billings Montana
    I'll try a few of your suggestions and see what happens. Will let ya know!! Thanks!!
  17. Bassmike62

    Bassmike62 GAS resistance is utterly futile... Supporting Member

    Same here. Caught the hockey game through my rig a couple of nights ago. Habs won.
  18. DiabolusInMusic

    DiabolusInMusic Functionless Art is Merely Tolerated Vandalism Supporting Member

    It is a capicitor used in major manufacturing. If they manufacture them so they don't get the frequency in your area it will in someone else's area.

    I had a guitar player that used to get radio through his amp, reading on Dunlop's website about their wah's they mentioned how in certain areas they pick up radio due to this reason. I imagine it is the same in your case.
  19. sleevey55

    sleevey55 Supporting Member

    Nov 21, 2009
    Billings Montana
    It was my instrument cable!!!! Changed it and nothing...........put the old one back on and I heard the radio again. Thanks all!!!!
  20. Mystic Michael

    Mystic Michael Hip No Ties

    Apr 1, 2004
    New York, NY
    I once had an amp that was "haunted" by The Rush Limbaugh Show. Naturally I had no choice but to burn that amp. :ninja: