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I am interested in hearing a brief/summary explanation of core saturation as it pertains to torroid transformers in SS amplifiers. Torroidal transformers are apparently susceptible to core saturation and resulting hum due to certain operating conditions such as certain power supply issues and situations with some DC on the line. I would like to understand that issue a bit better. I am also interested in a comparison of attributes between torroids and an EI core transformers (which are apparently less susceptible to hum). For example, the DNA-500 uses an EI-core transformer so what causes most amplifier manufacturers to use torroids, is it a cost issue or performance? I also understand Plitron makes a low-noise version of its torroidal transformers so what is different about those compared to conventional torroidal transformers? Lots of questions but any information will be appreciated.
Follow Ups:
See link, especially the part that begins with the magnetizing inductance and continues with discussion of core saturation.
Edits: 06/10/12
thanks Andy
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