1. Feb 8, 2006 #1
   

   remo

   Jan 15, 2005

   does anyone elses F-1X have an audible hummmm from the transformer when you switch it on? I'm not talking very loud, just noticeable in a quiet room. I just discovered it's actually called "lamination rattle" and is usually caused by poor mains power.

    
5. Feb 8, 2006 #2
   

   billfitzmaurice Commercial User

   Sep 15, 2004

   New Hampshire

   Owner, Bill Fitzmaurice Loudspeaker Design

   It's a natural condition and has nothing to do with the power. Potting the transformer can minimize the noise but if it's not audible under normal playing conditions it doesn't really matter all that much.

    
10. Feb 8, 2006 #3
    

    remo

    Jan 15, 2005

    it would only matter to me using the F-1X as a DI in a sutudio control room. Could you please explain what "potting the transformer" is?

     
14. Feb 8, 2006 #4
    

    eots

    Dec 18, 2004

    Morris, IL.

    http://www.stewmac.com/shop/Glues,_...pot/1/Electric_Glue_Pot/Articles.html#details
    
    An article on wax potting pickups also applies to transformers, since that's basically what a pickup is anyway.
    A replacement transformer might be an easier fix.

     

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