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   rec.audio.tubes      Tube-based amplifiers... that go to 11      52,877 messages   

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   Message 51,035 of 52,877   
   Richard to All   
   GEC KT88 Date manufactured and where?   
   31 Aug 10 20:52:17   
   
   From: nowt@ntlworld.com   
      
   Found two GEC KT88 tubes in the attic, (not boxed).   
      
   In the rectangle, below the designation "KT88" is, I think, a date and   
   manufacture code of: "RB  Z"   
      
   Anyone know when these were manufactured?   
      
   They are similar looking to:   
      
   http://www.natubes.com/data/images/product/large_517.gif   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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