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

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   Message 51,138 of 52,877   
   Ian Bell to Ian Iveson   
   Re: SE Headphones Amp   
   02 Oct 10 11:03:10   
   
   From: ruffrecords@yahoo.com   
      
   Ian Iveson wrote:   
   >>>> One thing I was wondering was if I use a transformer   
   >>>> with   
   >>>> a nominal 16 ohm secondary but use it with 32 ohm   
   >>>> headphones for example, then ra reflected into the   
   >>>> secondary would be so low relative to the load that  the   
   >>>> output could be considered essentially a voltage source.   
   >>>> Equally the load reflected to the plate would be four   
   >>>> times higher so distortion would be lower?   
   >>>>   
   >   
   > Language. Lower load = higher resistance.   
   >   
   > If you follow my logic, my point is clear. The load   
   > presented by the primary of a transformer comprises:   
   >   
   > 1. Primary winding resistance   
   > 2. Leakage inductance in series with 1   
   > 3. Reflected secondary winding resistance in series with 1   
   > and 2   
   > 4. Reflected secondary load in series with 1, 2 and 3   
   > 5. Primary inductance in shunt with 3 and 4   
   >   
   > Think.   
   >   
      
   Nope, maybe I am just thick. You said "10H is in shunt with load. Lower load   
   makes shunt more   
   significant."   
      
   Now you are saying "Language. Lower load = higher resistance."   
      
   Which means "Higher resistance makes shunt more significant"   
      
   That means to drive a higher resistance load I need MORE inductance in the   
   primary.   
      
   Does not make sense to me.   
      
   Cheers   
      
   Ian   
      
   > Ian   
   >   
   >   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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