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

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   Message 52,339 of 52,877   
   Phil Allison to All   
   Re: Quad-II mods - again, oh no....   
   26 Jun 14 20:17:43   
   
   From: phil_a@tpg.com.au   
      
   "Patrick Turner"   
   >   
   >A short note to all:-   
   >   
   > I was not completely happy with my old page on re-forming Quad-II amps for   
   > improved performance.   
      
      
   ** Nor was anyone else .   
      
   > So I have now re-edited all schematics and removed much BS and added more   
   > possibly useful stuff over the last month.   
   >   
   > http://www.turneraudio.com.au/quad2powerampmods.htm   
      
   ** The notion that the dual EF86 stage has less THD than the output stage   
   need correcting.   
      
    It does not, it has far more - about 5 times in fact - do our own test,   
   with the EF86s removed .   
      
   The correct result is in the vicinity of  0.2% THD at 10 watts and 1kHz   
   rising to 0.6% at 15 watts.   
      
      
   > I consider myself well pre-battered by Quad-II zealotistas   
      
   ** The Turneroid is like that mythical duck that all water runs off.   
      
    For "water" read rational thinking and fair criticism.   
      
    Quack, quack.....   
      
      
   ....  Phil   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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