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Old 2nd December 2005, 02:09 AM   #1
jh6you is offline jh6you
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Default dc-filtering-ac-power-station

Hi

Days ago, I fixed dc-blockers for my BOSOZ and F1 and found that they were working well (reference thread: Forte Audio 1a). And, I got real effect much better than other tweaks with quality of wires or components.

Therefore, I am going to make, say, a dc-filtering-ac-supply-station as shown below. The chassis will be of aluminum and will be directly connected to the earth. This station will cover Pass F1, BOSOZ, CD player and DVD projector.

Do you have any opinion or advice?
Particularly, regarding !!! SAFETY !!! of life. . .

Regards
jH
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Old 2nd December 2005, 01:20 PM   #2
lumanauw is offline lumanauw  Indonesia
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Hi, JH,

How are you

I just replace the cap for my bench drill machine, the cap is something like 10uF, 400VAC. Some of the proamps with SMPS also got cap in their AC input, but not that size (10.000uF), I think. Is it OK to put 50VDC cap for 220VAC?
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Old 2nd December 2005, 01:35 PM   #3
DIAR is offline DIAR  Finland
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The voltage over the capacitor is only few volts.

Here's how I built my dc blocker (which turned out to be useless). Home made circuit board with thick and wide traces.

http://www.diyaudio.com/forums/showt...=&pagenumber=2
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Old 2nd December 2005, 02:37 PM   #4
steenoe is offline steenoe  Denmark
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Here is a few gadgets for cleaning up the AC supply. Just scroll down the page
http://www.lcaudio.com/index.php?page=12
Just for inspiration. With schematics.

Steen
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Old 2nd December 2005, 02:39 PM   #5
jh6you is offline jh6you
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Hi Lumanauw

I'm fine thanks

The bigger, the berrerrrrrrrr . . . . . . maybe.
The polarized electrolytic capacitor doesn't like to see overvoltage or reversevoltage. If capacitor sees the overvoltage or the reversevoltage, it becomes hot temper, and boils the yellow blood inside, and gets high blood pressure, and BAM !!!!!!! Meanwhile, the barrier potential of the bridge diode is about 0.7V. Luckily, the capacitor hardly see voltages higher than +/- 0.7V in this case. -- [i]my hope[i/]

Question: how much reversevoltage we could safely ignore?
Lumanauw, this is your homework. Solve it and tell me

Regards
jH


Thanks, Diar and steenoe.
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Old 2nd December 2005, 03:38 PM   #6
wuffwaff is offline wuffwaff  Netherlands
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Hi,

if you want even more effect you could try ac-balanced-power combined with the dc-filters.
http://www.diyaudio.com/forums/showt...802&highlight=


William
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Old 2nd December 2005, 06:47 PM   #7
Zen Mod is offline Zen Mod  Serbia
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dc-filtering-ac-power-station
when you gona to build somethig,implement this also
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Old 2nd December 2005, 06:49 PM   #8
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Old 3rd December 2005, 04:08 AM   #9
jh6you is offline jh6you
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Hi Wuffwaff

The ac-balanced-power is intersting.
By the way, I think that the dc-filtering does the ac-balancing at the same time. Doesn't it . . . ?

Regards
jH
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Old 3rd December 2005, 12:23 PM   #10
wuffwaff is offline wuffwaff  Netherlands
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Hi,

if you mean that after balancing the dc out of the mains is also removed you´re right.

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