I have had a look at the magnan web site about their recommendation for DIY parallel power line filters. They recommend that 100mF worth of cap should (plus some bypass caps 0.47mF, 0.01mF) be placed from live to neutral. This should be placed near to the equipment outlets for good results. I am thinking of doing this with adiitional things like placing some MOVs and discharge resistors in addition to the caps. Has anyone tried this ? & of course is it dangerous ? BTW, I have tried Thorsten's DIY filter as mentioned in TNT-audio.

Regards,
Joe L.

• magnan web site

 Re: thanks ! (nt) - Joe L. 18:01:35 4/05/99 (0)
 Re: DIY parallel filter - Jon Risch 20:58:50 4/04/99 (0)
 Re: DIY parallel filter - Alan Ersen 08:35:41 4/01/99 (1)

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 Re: thanks ! (nt) - Joe L. 18:01:35 4/05/99 (0)
 Re: DIY parallel filter - Jon Risch 20:58:50 4/04/99 (0)
 Re: DIY parallel filter - Alan Ersen 08:35:41 4/01/99 (1)
 Safety - was: Re: DIY parallel filter - Thorsten 06:49:01 4/05/99 (0)

The caps should also be enclosed in a sturdy case or enclosure, with the conflicting requirement that they be located physically as close to the AC outlets as possible. I also recommend the discharge resistors.

Personally, i thingk that most of the benefit could be had from 1 uF caps, without nearly the amount of safety hazard, this size should not require a bypass except for digital (computer) devices.

Jon Risch

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