• Re: Is LL1663 strong enough for 1 pair of 6550 ? - KevinC 05:06:36 09/26/03 (2)
  In Reply to: Is LL1663 strong enough for 1 pair of 6550 ? posted by akltam on September 26, 2003 at 01:14:53:

  Alan,

  The LL1663 will do 40w push-pull comfortably and handle up to 160mA of primary current per tube, so I think that its more than adequate for your application. You might approach the power limitation if you were operating the tube at 580vDC B+ in triode, but I don't recommend that operating point with modern KT88s!
  
  Kevin Carter
  K&K Audio
  www.kandkaudio.com
  
  

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  • How would you compare the 1663 and 1623/pp soncially ? - akltam 18:30:53 09/26/03 (1)
    In Reply to: Re: Is LL1663 strong enough for 1 pair of 6550 ? posted by KevinC on September 26, 2003 at 05:06:36:

    Thanks.

    Alan
    
    

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    • I haven't compared them directly - KevinC 08:41:38 09/27/03 (0)
      In Reply to: How would you compare the 1663 and 1623/pp soncially ? posted by akltam on September 26, 2003 at 18:30:53:

      Alan,

      I haven't yet had a chance to compare them directly in the same amp. I have used them both and liked the sound of both resulting amps, but that doesn't help you decide which to use.

      In theory the smaller transformer should have greater high frequency bandwidth, as long as its power ratings aren't exceeded.
      
      Kevin Carter
      K&K Audio
      www.kandkaudio.com
      
      

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