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Transformers, 220V AC
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<blockquote data-quote="gbyleveldt" data-source="post: 4242" data-attributes="member: 122"><p>Just for interest sake,</p><p></p><p>I have all my toroids made by Toroidal Technologies. Also pricey in one off quantities, but if you compare it with what the guys pay overseas for custom toroids, I think we are paying peanuts! As a matter of interest, something I was told recently. You have the option of giving the toroid VPI treatment for an additional 18%. This is required for larger sizes, especially in Class A amplifiers were you have a constant drain on the supply. I'm not too sure about the details of the process, but basically it is an additional step in the process where the windings are forced tighter in a vacuum sealing process. This limits the amount of audible hum that the toroid emits.</p></blockquote><p></p>
[QUOTE="gbyleveldt, post: 4242, member: 122"] Just for interest sake, I have all my toroids made by Toroidal Technologies. Also pricey in one off quantities, but if you compare it with what the guys pay overseas for custom toroids, I think we are paying peanuts! As a matter of interest, something I was told recently. You have the option of giving the toroid VPI treatment for an additional 18%. This is required for larger sizes, especially in Class A amplifiers were you have a constant drain on the supply. I'm not too sure about the details of the process, but basically it is an additional step in the process where the windings are forced tighter in a vacuum sealing process. This limits the amount of audible hum that the toroid emits. [/QUOTE]
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DIY & Tutorials
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Transformers, 220V AC
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