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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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In Reply to: RFI from strange places posted by Lynn on January 8, 2007 at 18:28:09:
Hi.Stop using them when you switch on your HiFi. This is the best bet.
Differential noises, a EMI/RFI generated noise on the powerlines are emitted all over the place inside our house though we don't seem to notice it.
A common noise source is the switch mode power supplies built inside our computers, PC LCD monitors, flat panel plasma & LCD TVs, notebook, cellphone & camera battery chargers, etc etc etc. Now we add to the long noise source list the control panels of our long betrusted washers.
What is next that we don't know?
Powerline filters are therefore imperial to remove such digital noise craps before they invade our audio gears.
Don't overlook your CD & DVD players, part of your audio rig, also emit digital noise into the powerline where your other audio gears are sharing. So switch them off whenever you're not playing them.
I measured the powerline noises with the wideband powerline & EMI noise analyser & indeed detected noise level on the powerline hooked up to my CD & DVD players raised when they are switched on.
This hinted me to install discrete powerlines with wideband inline filters exclusively for my digital gears, as well as for my analogue gears. Digital & analogue gears should not be share the same powerlines.
For condo type multi-flated residences, the situation is worse as the
steel re-bar formworks built inside the walls & the concrete floor slabs constiute a huge & powerful EMI/RFI receiving antenna loop.
Powerline filters are indispensable for our audio gears.c-J
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Follow Ups
- RFI/EMI noises are everywhere. !!! - cheap-Jack 07:47:03 01/09/07 (2)
- Not forgetting the lit-up power switch of a power strip. - cheap-Jack 08:07:32 01/09/07 (1)
- Correction: "toggle switch" should read "rocker switch". (nt) - cheap-Jack 12:24:29 01/10/07 (0)
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