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Low Earth Orbit
DIY Audio
Line Level Isolation Transformers
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<blockquote data-quote="Frank DeWitt" data-source="post: 49355" data-attributes="member: 1408"><p>Re: Line Level Isolation Transformers</p><p></p><p></p><p></p><p>I would use the same technique as many direct boxes Ground through a switch but put a cap across the switch for RF grounding.</p><p><a href="http://www.jensen-transformers.com/datashts/dbe.pdf" target="_blank">http://www.jensen-transformers.com/datashts/dbe.pdf</a></p><p>I checked with Jensen before coming out with my DI box and they say the resistor is not needed, just the cap.</p><p></p><p>BTW I think it is important to NOT ground the shell of the XLR jacks. Many cords have Pin 1 incorrectly connected to the shell, If you use one of these, you defeat your ground lift and it can be confusing when you are trying to get rid of hum and are in a hurry. </p><p></p><p>Frank</p></blockquote><p></p>
[QUOTE="Frank DeWitt, post: 49355, member: 1408"] Re: Line Level Isolation Transformers I would use the same technique as many direct boxes Ground through a switch but put a cap across the switch for RF grounding. [url]http://www.jensen-transformers.com/datashts/dbe.pdf[/url] I checked with Jensen before coming out with my DI box and they say the resistor is not needed, just the cap. BTW I think it is important to NOT ground the shell of the XLR jacks. Many cords have Pin 1 incorrectly connected to the shell, If you use one of these, you defeat your ground lift and it can be confusing when you are trying to get rid of hum and are in a hurry. Frank [/QUOTE]
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