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In Reply to: RE: Back to basics posted by Triode_Kingdom on June 02, 2012 at 16:28:48
TK
Logic dictates that the less stress
on a componant the better it will perform.
Experience confirms this to be true.
The major stress on a SE transformer
is the DC current it has to handle.
Removing that stress will be a plus
on the performance of the transformer.
Reports on every time it is tried
has also confirmed this to be true.
Whatever the major lack in the performance
as a SE transformer when used in parafeed
that is the most improved characteristic
whether transparency, bass or treble.
Add to that, Dave Slagle always maintains
that some gap on a transformer makes the
transformer perform better even in parafeed.
From the preponderance of evidence, one must
concede that there is something to this.
If you still maintain that you need a
double blind test before you can accept this
then it just is preposterous.
This leads me to wonder what are you doing on this site?
What happened to you over the years?
You used to be a reasonable guy.
You used to be open minded and adventurous.
Now you are so closed off and cynical.
I miss the old TK 8^(
DanL
Follow Ups:
In my experiences. A properly designed and implemented direct feed transformer sounds better than that same transformer parafeed.
I have on occasion found exceptions to this particularly when the direct feed transformer was being pushed too hard or was light in inductance for the tube it loads. (what I would call improperly designed or implemented) In the above cases, parafeed can help particularly in the bass since removal of the DC current (if operated at high DC flux) can place the AC in a more linear spot in the BH loop and as Naz pointed out the CL resonance can be tuned to extend the bass an octave lower.
dave
Dave
I am sorry if I mis-stated your position.
IIRC I read a thread on your Intact Forum
that you asserted quite strongly that
transformers sound better with a gap.
This was a few years ago (maybe more).
This always stuck with me.
I also remember someone on the Magnequest site
that used a Robin Hood series fed OPT
and liked the sound but then tried it parafeed
and was blown away with the improvement.
Also many posts on Hammond and Edcor iron
that regailed vast improvements in sound
when they were used in parafeed.
So I added that together and came up with
the conclusion as I have stated before.
Maybe "premium" iron is excluded from this,
as these were all budget irons being used.
DanL
I have maintained that a small intentional airgap is preferred to a design that goes for a minimal airgap even if there is no DC present.
Dave
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