Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: Re: DIY parallel filter posted by Alan Ersen on April 1, 1999 at 08:35:41:
Hi all,Just some safety notes here!
All Capacitors used in these Filters require a X or Y Rating of some form.
The 0.1uF Capacitors I use in the Parallel Filters published on TNT-Audio are Rated for Mains Connection in the UK in X or Y positions at 250V AC Mains.
The large (in my case 8uF) Capacitors are intend for power-Factor Correction and hence also safe for X connection on 240V AC Mains.
ANY subtitutions MUST adhere to similar standards. Capacitors NOT rated for power-Factor Correction, or X/Y Connection at the Mains-Voltages in your country MUST NOT BE EMPLOYED in these Filters.
Electrolytic Capacitors cannot be used at all, all Capacitors must be film or Paper types OF SUITABLE RATING.
Besides that, these Filters work great and are cheap. There is a rate of diminishing return though.
However, as the US has a Mains-Voltage of half that in the UK, I'd expect that in the US MUCH larger Values than in the UK still make a notable Difference.
My Stereo currently uses a total of 32uF across the Mains at the 24V AC UK Mains-Voltage.
For the same Energy-storage on Peakes the US Mains would require about 150uF....
But remeber - with ANYTHING to do with Mains-Voltages -
PLEASE BE SAFE
Later Thorsten
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Follow Ups
- Safety - was: Re: DIY parallel filter - Thorsten 06:49:01 04/05/99 (0)