方牛 vs 環牛

djaddy

Djaddy's Evolution & DIY Zone:
http://www.post76.com/discuss/vi ... p;extra=&page=1

http://www.soundstage.com/maxdb/maxdb071998.htm

So an EI-frame transformer is always better than a toroidal transformer?

Hmmm. Good question. I am tempted to say "yes" because really excellent toroidal transformers are apparently difficult, if not impossible to purchase off-the-shelf. However, finding great EI-transformers is no walk in the park either. But in general, being able to connect the core of the EI-frame transformer electrically to the chassis of the component and the air gaps created by the two-piece laminated core give even off-the-shelf EI-frame transformers some performance capabilities beyond what you can get from off-the-shelf toroidal transformers. If you know your magnetic theory (or your transformer vendor does), there are additional winding tricks that give EI-frame transformers 20dB to 30dB more noise rejection than typical toroidal transformers. This is very significant. 20dB less noise is 1/100th of the noise of the "reference" level. 30dB less noise is 1/1000th of the "reference" noise level. You might be able to find a toroid manufacturer who could do the custom winding, add an air gap and attach a ground wire to the core. You would pay two to three times the cost of an off-the-shelf toroid to get that level of performance. But you sure won’t find a toroid off the shelf that performs as well.

I’ve been lucky enough to speak to a variety of high-end manufacturers about AC power, transformers, and component design. Conversations with Richard Vandersteen, Mike VansEvers and Emil Rotar (Warner Imaging) have been most illuminating. Years ago, I never really gave power transformers much thought. The assumption was that because so many high-end manufacturers were using toroidal power transformers, toroids must be demonstrably superior. Imagine my surprise when I started noticing that many of the best sounding components I’ve experienced in my system have all had EI-frame transformers. Coincidence? I might have thought so before finding out so more about power and transformers. Now I’m convinced that cleverly done EI-frame transformers could/should give us better sounding high-end audio components.

...Doug Blackburn
db@soundstage.com

coolpan

哇, CHING好利害, 又有一編英文分享

djaddy

2# coolpan

haha... let's see if the google translation makes any sense:

因此，一依愛框架變壓器總比一環形變壓器？

嗯。好問題。我很想說“是”，因為真正優秀的環形變壓器，顯然是困難的，如果不是不可能購買現成的貨架。然而，尋找偉大的依愛變壓器是沒有走在公園或者。但總的來說，能夠連接為核心的依愛框架變壓器的電氣組件的底盤和空氣的差距創造了兩件層壓核心帶給過現成的依愛幀變壓器的一些性能超越你可以從現成的現成環形變壓器。如果你知道你的磁學理論（或您的變壓器供應商一樣），還有額外的繞組竅門是讓依愛幀變壓器 20dB至30分貝以上的噪音抑制比典型的環形變壓器。這是非常重要的。 20dB的低噪音，是百分之一的噪音的“參考”的水平。 30dB的低噪音是千分之一的“參考”噪音水平。您也許能夠找到一個環形製造商誰可以自定義的纏繞，增加一個空氣間隙和附加接地線的核心。你將支付2至3倍的費用場外現成的環形獲得該級別的性能。但你肯定不會找到一個現成的環形性能相當。

我一直有幸能夠接觸到不同的高端製造商對 AC電源，變壓器和組件設計。交談理查德Vandersteen，邁克 VansEvers和埃米爾羅塔爾（華納成像）已經非常富有啟發。年前，我從來沒有真正給電力變壓器用心良苦。假設是，因為如此多的高端製造商使用環形電源變壓器，螺旋管必須具備明顯優勢。想像我的驚訝，當我開始注意到，許多最響我所經歷的組成部分，在我的系統中都已經依愛框架變壓器。巧合？我有可能這樣才找到了使更多的權力和變壓器。現在，我深信，精心做依愛幀變壓器可以/應該使我們更好地探測高端音頻組件。

coolpan

都係英文版好D....

djaddy

4# coolpan

hahaha... {:5_93:}