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RE: OPT Not Always the Case

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dave slagle

In Reply to: RE: OPT Not Always the Case posted by Super_BQ on October 06, 2007 at 17:49:41

if the cut in a toroid is not "sonically good" how do you explain the use of C-cores which from the cores perspective is the same thing.

dave

Follow Ups:

Saturation Point - Super_BQ 12:18:40 10/07/07 (2)
Does a C-core output transformer give more inductance than an EI core for the given size? In SET design, the output wattage is not high enough to make C-core effective for good sound; that is the operating range is less than a watt which isn't working in the C Core's optimum range. (hence why the thin sound). Of course if you do run the amp at over half it's power rating (ie. disco / PA system where high SPLs are required), then I could see the point with C Cores. Also those with SET amplifiers tend to use high efficiency speakers so anything more than 5 watts is just fudge.

Now if we're talking about C cores in PP applications, then that's a horse of a different colour and off the topic what the original poster asked.

As the usual disclaimer, just my opinioin and many will disagree!
- RE: Saturation Point - dave slagle 13:05:07 10/07/07 (1)
  Does a C-core output transformer give more inductance than an EI core for the given size?
  
  if the parameters are kept the same then the operation should be the same. (for non-oriented materials, if grain oriented steel is used then i would expect better results from the C-core)
  
  In SET design, the output wattage is not high enough to make C-core effective for good sound; that is the operating range is less than a watt which isn't working in the C Core's optimum range.
  
  what exactly is the C-cores "optimum range"
  
  Now if we're talking about C cores in PP applications, then that's a horse of a different colour and off the topic what the original poster asked.
  
  i fail to see why the type of operation matters.
  
  dave
  - RE: Saturation Point - Super_BQ 20:07:11 10/07/07 (0)
    I will go back to my original post that, if C-Core was so good in SET designed amplifiers, then why don't we see more of it being used? I also don't believe the extra cost to build a C-Core (or Toroidal SET OPT) is the primary reason for their lack of popularity. Do a search online (AA, DiyHiFI, etc.) and you'll find the merits of why EI is still commonly used (even in the most high-end exotic amps). Perhaps we need an explanation of the 'thin' sound from?
    
    For some good reading:
    
    http://www.turneraudio.com.au/output-trans-theory.html

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