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PostPosted: Sun Sep 13, 2015 11:38 am 
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What the differences between a torroidal and standard transformer? Also, why are torroidal usually asscociated with Ss amps? You very rarely see a torroidal on a tube amp.


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PostPosted: Sun Sep 13, 2015 12:14 pm 
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BKSRT8 wrote:
What the differences between a torroidal and standard transformer? Also, why are torroidal usually asscociated with Ss amps? You very rarely see a torroidal on a tube amp.


There is some explanation here.... http://www.avsforum.com/forum/90-receiv ... ndard.html


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PostPosted: Sun Sep 13, 2015 12:23 pm 
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Lighter, space saving and cheaper for sure.
Others who know will explain tech and performance differences.
My tube preamp is the only unit that carries several laminated transformers.

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PostPosted: Sun Sep 13, 2015 2:02 pm 
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toroids are smooth like liquid lunch


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PostPosted: Sun Sep 13, 2015 2:25 pm 
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An EI transformer has more limited bandwidth than a toroidal. That's actually a benefit for a power supply or isolation transformer because it acts as a filter, although not a very effective one. It's bit ironic that where wider bandwidth is required, such as a output transformer, the preferred method is EI. However, they allow manufacturers to custom wind to their specifications.


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PostPosted: Wed Sep 16, 2015 10:27 am 
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This touches on when and why they are used and why not plus more its informative http://www.soundstage.com/maxdb/maxdb071998.htm


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PostPosted: Thu Sep 17, 2015 8:41 am 
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That was a great read. Very informative


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PostPosted: Thu Sep 17, 2015 12:13 pm 
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ngjockey wrote:
An EI transformer has more limited bandwidth than a toroidal. That's actually a benefit for a power supply or isolation transformer because it acts as a filter, although not a very effective one. It's bit ironic that where wider bandwidth is required, such as a output transformer, the preferred method is EI. However, they allow manufacturers to custom wind to their specifications.

Both types can be custom wound.

The lamination material is much different for power transformers vs audio output/input range.

So much audio lore created around toroidal xformers.
Advantages in size and cooling for high power but not so clear with low power and preamps etc. ?

-- 17 Sep 2015 20:26 --

sublimesounds wrote:
This touches on when and why they are used and why not plus more its informative http://www.soundstage.com/maxdb/maxdb071998.htm

Interesting but mistaken on a couple of points.

Google for transformer winding machines and toroidal coil winding machines for YouTube videos of clever and precise and consistent coil winding at high speed.

Anyone up on why and how hand winding could possibly be better for audiophile transformers?

Bifilar or trifilar wire you say :shock:

Everyday events for commercial coil winding companies. :roll:


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PostPosted: Tue Sep 29, 2015 4:03 am 
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As per my observation the EI transformer has limited bandwidth but toroidal have enough bandwidth. This is a benefit for a power supply or isolation transformer because it acts as a filter, although not a very effective one. In most of the applications wider bandwidth is required, such as a output transformer, the preferred method is EI. However, they allow manufacturers to custom wind to their specifications.

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PostPosted: Tue Sep 19, 2017 7:51 pm 
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In most of the applications wider bandwidth is required, such as a output transformer, the preferred method is EI.



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PostPosted: Tue Sep 19, 2017 8:22 pm 
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Some similar discussions going on over at the Dynaco Tube Audio Forum.

http://dynacotubeaudio.forumotion.com/t ... ansformers


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