SET Asylum

RE: hysteresis losses

69.229.8.160

Tre'

In Reply to: RE: hysteresis losses posted by Ralph on July 01, 2008 at 11:21:48

No, you're not missing anything now.
The hysteresis loss is probably greater once you reverse the field.
But even when you don't reverse the field you still have hysteresis losses.
What I'm trying to get away from is the lack of frequency extension caused by the gap in a SE transformer.
P.S. It's interesting how many SET'ers are going parafeed. With parafeed one would have the same zero crossing losses as with push pull.
I think it's all about trade offs.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"

Edits: 07/01/08

Follow Ups:

RE: hysteresis losses - PakProtector 13:42:57 07/05/08 (0)
hey-Hey!!!,
I don't think the gap is hurting the frequency extension. Other methods used to deliver enough inductance at LF mean more winding capacitance and leakage L( more turns ). Your trade-off's yes?
cheers,
Douglas

Friend, I would not hurt thee for the world...but thou art standing where I am about to shoot.
RE: hysteresis losses - Donald North 22:01:40 07/01/08 (0)
A well designed and constructed SE transformer should have plenty enough bandwidth to cover the audible spectrum. However depending on your desired impedance, power rating, and materials construction, it may cost $$$.

Donald North
Solve one problem-- - Ralph 13:12:03 07/01/08 (3)
and you create a bigger one, seems a very true axiom.

Have you built this circuit yet? I'd be interested in seeing how it turns out.
- RE: Solve one problem-- - Tre' 13:24:55 07/01/08 (2)
  Why do you assume that the one is bigger than the other.
  I would think it's the other way around.
  Solve one big problem create one small problem.
  BTW I think I'll do parafeed instead.
  Tre'
  Have Fun and Enjoy the Music
  "Still Working the Problem"
  
  Edits: 07/01/08
  - I'm sure that is perspective - Ralph 13:45:43 07/01/08 (1)
    Bandwidth is certainly a serious issue and I am a big fan of wide bandwidth.
    
    My understanding is that some of the popularity of SETs comes from good 'inner detail', which to my understanding comes from really low distortion at lower power levels, something that push-pull can't do so well; though if you make a smaller P-P amp, I'm sure it helps :)
    
    P-P always had pretty good bandwidth though. So- do you expect this to be a bit of crossover between worlds?
    - RE: I'm sure that is perspective - Tre' 14:39:55 07/01/08 (0)
      Yes. I guess that's what I'm hoping for.
      
      We'll see.
      
      Tre'
      Have Fun and Enjoy the Music
      "Still Working the Problem"

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