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Junior Varsity
X32 Discussion
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<blockquote data-quote="Dan Mortensen" data-source="post: 83184" data-attributes="member: 2826"><p>Re: X32 Discussion</p><p></p><p></p><p></p><p>The article is correct in that it only mentions screening. The screen (shield) is not what solves the problem, it's the twisted pair. Screening is only good at higher frequencies IIRC.</p><p></p><p>And hum is a low-frequency phenomenon. The design of Common Mode Rejection circuits (the first thing that the signal hits when it enters a device, whether a transformer or an electronically balanced circuit) has vastly improved in the last 20 years or so, and the handling of the pin 1 problem clarified and brought to wide attention by the late, great Neil Muncy, as well as the improvement in lighting dimmer circuits, has reduced to almost negligible the problems the article is referring to. Mostly.</p><p></p><p>Other than that, the quoted article is correct...</p></blockquote><p></p>
[QUOTE="Dan Mortensen, post: 83184, member: 2826"] Re: X32 Discussion The article is correct in that it only mentions screening. The screen (shield) is not what solves the problem, it's the twisted pair. Screening is only good at higher frequencies IIRC. And hum is a low-frequency phenomenon. The design of Common Mode Rejection circuits (the first thing that the signal hits when it enters a device, whether a transformer or an electronically balanced circuit) has vastly improved in the last 20 years or so, and the handling of the pin 1 problem clarified and brought to wide attention by the late, great Neil Muncy, as well as the improvement in lighting dimmer circuits, has reduced to almost negligible the problems the article is referring to. Mostly. Other than that, the quoted article is correct... [/QUOTE]
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