• RE: 45 Parafeed Output Transformer - johnsonad 18:13:48 03/06/17 (3)
  In Reply to: RE: 45 Parafeed Output Transformer posted by mqracing on March 06, 2017 at 16:45:44

  Which Mexico model has a 5k primary?
  

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  • RE: 45 Parafeed Output Transformer - mqracing 18:41:13 03/06/17 (2)
    In Reply to: RE: 45 Parafeed Output Transformer posted by johnsonad on March 06, 2017 at 18:13:48

    I'm debating which model to build in the Mexico format. Each candidate would involve a redesign...

    Here's the candidates:

    EXO 40 Series. 5k primary. Parafeed. As Mexico it would have secondary impedances of 16, 8, and 4 ohms.

    TFA-200? JR a five K version of the TFA-2004 MEXICO.

    I'm very much leaning toward the EXO FORTY devices as I have a much greater inventory of cool laminations (M3, M4, M6, and low nickel) in this size whereas my inventory of the good stuff in the 2004 core size is much more limited and is very difficult to source these days.

    Plus smaller core sizes are magnetically more efficient due to the shorter magnetic path length.

    Someday I have to say more about core materials and buyers' preferences... and how there's some really AWESOME state of the art core mats that don't enjoy the buzz factor (sadly) that say nickel and cobalt do...

    I'm game for input, feedback, ideas, suggestions... a discussion of what may be desirable and what may be practical...

    MSL

    
    

    
    
    
    Builder of MagneQuest & Peerless transformers since 1989
    
    
    

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    Edits: 03/06/17   03/06/17   03/06/17   03/06/17   03/06/17   03/06/17

    • RE: 45 Parafeed Output Transformer - OldNuke 09:12:28 04/04/17 (0)
      In Reply to: RE: 45 Parafeed Output Transformer posted by mqracing on March 06, 2017 at 17:41:13

      Hi Mike,
      Just touching back with you on these transformers. Are your new core mats on or above the level of the Mexico PS or Quad core outputs you made? These are definitely an Awesome set of outputs.
      
      I think the love for nickel and cobalt to me comes from the detail in the mid range you can hear in very low power amps. I bet they really shine with another couple of watts power but I haven't heard any in a > 4 watt amp.
      
      My 2 cents (should be 50 with inflation) is let's generate the buzz. There won't be any talk until you get them in the hands (ears) of people with amps and I'm all in for experimenting.
      Alonzo
      

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    • RE: 45 Parafeed Output Transformer - OldNuke 21:33:44 03/11/17 (0)
      In Reply to: RE: 45 Parafeed Output Transformer posted by mqracing on March 06, 2017 at 18:41:13

      Didn't you used to make a EXO-50 (5K 4,8.16 ohms)? How far off would it be to go this route and only make the 8 ohm, or 4 ohm, whichever would give the longest unbroken run in a Mexico version? A somewhat compromise so that you don't have to add the additional taps into the winding.
      
      

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