Author Topic: 5687 Tube  (Read 3053 times)

Offline rollo

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5687 Tube
« on: January 10, 2011, 08:41:44 AM »
  Just got in a pair of CBS labled 5687s made by Tungsol for CBS. Blackplates with copper rods. Either I received a extremely low noise tube or this particular tube is something special. Anyone else have experience with this tube ?
  How about other 5687s you may have tried ?  :)

charles
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