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Positional Hum & Mu Shield



Alan,

 One thing that can help with reducing positional hum is placing Mu
shield around your tube.  This can be in the form of a small cylinder
that goes around the tube neck to complete lining of the tube cover
and a Mu shield cover under the tube.  
 You can contact Dave Grilli at Mu Shield. 
 Phone 603-666-4433
  Fax    603-666-4013
They will make up any piece you need.

  David Warner        Crawford Communications