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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: Reducing RF noise improves the whole audible spectrum. posted by Al Sekela on May 8, 2007 at 14:35:02:
Almost every component in audio equipment generates and radiates RF INSIDE their enclosure, especially active devices such as transistors and 3-terminal voltage regulators. To verify this get a pocket size radio and earphone. Remove the cover of your preamp. Turn it on and tune the radio between stations (AM or FM) and slowly move it over the top of the preamp about 3 inches or so above the preamp. You will be surprised at the cacaphony you hear. Then pass a signal thru the preamp and you will be shocked at the banshee waillings you hear. The only solution to this is to shield the offending components. Copper is a poor shield against RF, reflecting about 1/3 of the RF and passing the rest thru the "shield". Texas Instruments manufactures "T.I. Shield", two sheets of Copper with a proprietary metal between the copper layers. They claim that T.I. Shield blocks 98+ % of both RFI and EMI. It is available in sheet form 12" wide, in various thicknesses from Percy. It is very easy to work with tin snips and solders readily.Happy Shielding !
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Follow Ups
- Re: Reducing RF noise improves the whole audible spectrum. - pkell44 12:24:42 05/12/07 (0)
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