dc filter - Page 10

peranders · 15th January 2005, 07:07 PM

Quote:

Originally posted by Upupa Epops
Very elegant solution have Dieter Burmester, but it is patented ( I forgot number of this patent ).

At the Arken exhibition 2004 I have seen his gigantic box but it was empty because it was so heavy

http://hififorum.nu/forum/topic.asp?TOPIC_ID=34612
http://hififorum.nu/forum/topic.asp?TOPIC_ID=32464

Upupa Epops · 15th January 2005, 07:48 PM

To P-A : His " Mains washing machine " isn't so heavy

, but is able to make DC unbalance of mains below +/- 1 mV

.

richie00boy · 29th January 2005, 06:46 PM

Quote:

Originally posted by Elso Kwak
Hi,
Attached a very simple circuit that is working since 29 years with a 1k5 Watt transformer.....(NOT a toroid BTW!) Of course this is a AC relay.

How is the delay determined with this circuit? Is the timing affected by all the components?

peranders · 30th January 2005, 05:37 AM

1 The voltage drop of the R (caused by the resistance and the inrush current).

2 The pull-in voltage of the relay.

richie00boy · 30th January 2005, 10:18 AM

Thanks, but what influence does the cap have? Surely that is what causes the delay.

bremen nacht · 30th January 2005, 08:03 PM

Quote:

Originally posted by richie00boy

MAPLIN - my vote for the most incompetently managed company in the UK.

ha ha - bit harsh but I know what you mean. Their website is a mine of misinformation and the catalogue is hilarious '...a very proffesional pair of headphones frequency response 5Hz to 35KHz Â£9.99...'

richie00boy · 30th January 2005, 08:07 PM

That as well, but my comment is more directed by the fact that I have an understanding of what goes on inside the company. Joined-up thinking is something that company have yet to stumble across.

maxlorenz · 7th February 2005, 12:57 AM

Sorry to intrude.
The noisiest transformer in my (and I presume in everyone's) house is the refrigerator's one. Although I have dedicated power main for my system I still suspect this fellow for contaminating my music. Could a DC blocking filter be useful there?

Thanx

GregD · 20th April 2005, 07:25 PM

What about using an AC rated metalized polypropylene capacitor for DC blocking. Specifically, I'm looking at the Cornell Dublier SF series.
http://www.cornell-dubilier.com/catalogs/SF.pdf

It seems that this should do the job, handle lots of current, be relatively compact, and not require any bypass diodes for protection. Unless I'm missing something.

peranders · 20th April 2005, 07:49 PM

Quote:

Originally posted by maxlorenz
The noisiest transformer in my (and I presume in everyone's) house is the refrigerator's one.

.... you mean compressor....

30th January 2005, 05:37 AM	#94
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	1 The voltage drop of the R (caused by the resistance and the inrush current). 2 The pull-in voltage of the relay. __________________ /Per-Anders (my first name) or P-A as my friends call me Tube Buffered Gainclone in work \|Thread

30th January 2005, 10:18 AM	#95
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	Thanks, but what influence does the cap have? Surely that is what causes the delay. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

30th January 2005, 08:07 PM	#97
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	That as well, but my comment is more directed by the fact that I have an understanding of what goes on inside the company. Joined-up thinking is something that company have yet to stumble across. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

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15th January 2005, 07:48 PM	#92
Upupa Epops diyAudio Member Join Date: Aug 2003 Location: Prague,Czech Republic	To P-A : His " Mains washing machine " isn't so heavy , but is able to make DC unbalance of mains below +/- 1 mV .

7th February 2005, 12:57 AM	#98
maxlorenz diyAudio Member Join Date: Oct 2003 Location: osorno , Chile	Sorry to intrude. The noisiest transformer in my (and I presume in everyone's) house is the refrigerator's one. Although I have dedicated power main for my system I still suspect this fellow for contaminating my music. Could a DC blocking filter be useful there? Thanx

20th April 2005, 07:25 PM	#99
GregD diyAudio Member Join Date: Aug 2004 Location: SoCal	What about using an AC rated metalized polypropylene capacitor for DC blocking. Specifically, I'm looking at the Cornell Dublier SF series. http://www.cornell-dubilier.com/catalogs/SF.pdf It seems that this should do the job, handle lots of current, be relatively compact, and not require any bypass diodes for protection. Unless I'm missing something.

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