MKP rated X2

Malefoda · 23rd May 2007, 08:40 PM

Hi there,
on a source I want to change the older than old DC blocking caps, 0.33µF electrolytics, for better ones. Not the best, the aim is to improve the sound for nothing if possible. In are now 1µF MKS, but I find it's not to be left in. I've in hand 0.22µF MKP but X2 rated, MKT 2.2µF. Or even 0.03µF Siemens MKP. Does the X2 rated MKP fit? MKP is MKP, isn't it?

Thanks!

Nordic · 24th May 2007, 04:47 PM

What is the value of the resistor it is connected to...?

richie00boy · 24th May 2007, 05:32 PM

X2 rating is simply a safety failure mode rating.

Malefoda · 24th May 2007, 07:16 PM

So X2 is not a sound problem, MKP rules

Here is the pic of the output of my tuner, the closest resistors feeding the caps (my MKS here) are 2.2k. I don't know if they are the one you talked about Nordic, maybe to check the value of the caps?

Thanks guys!

AndrewT · 25th May 2007, 03:29 PM

Hi,
those two pots may be presets to control the level of signal fed to the amplifier.
If you can read off or measure their resistance then that may help.

The reason for asking is that a few components in the input are there to filter the signal before passing it to the amplifier.

There are usually a low pass filter and a high pass filter. The series capacitor and the following resistor to ground form the high pass filter that blocks DC from entering the amp and also attenuates very low frequency signals. The bandwidth of the following amplifier should/could affect choice of capacitor value.
The filtered signal should match the designer's specification and changing caps could change the way the amplifier behaves.

Malefoda · 25th May 2007, 03:56 PM

Ok I see, but... can I use something I've got here ?

Malefoda · 25th May 2007, 04:29 PM

I'll try to draw the output of my tuner to help.

Nordic · 25th May 2007, 05:10 PM

you can try the .22uf, but it will likely sacrifice some low frequency extention. As said above, stick to original values, play round with types if you want to... those red caps (WIMA?) are normally fine...

Malefoda · 25th May 2007, 05:12 PM

OK thanks!

Malefoda · 29th May 2007, 02:34 PM

Got Wima MP3 0.33uF, do this sounds good or at least like the MKS? At least they are the right capacity.
Like these:

23rd May 2007, 08:40 PM	#1
Malefoda diyAudio Member Join Date: Jun 2006	MKP rated X2 Hi there, on a source I want to change the older than old DC blocking caps, 0.33µF electrolytics, for better ones. Not the best, the aim is to improve the sound for nothing if possible. In are now 1µF MKS, but I find it's not to be left in. I've in hand 0.22µF MKP but X2 rated, MKT 2.2µF. Or even 0.03µF Siemens MKP. Does the X2 rated MKP fit? MKP is MKP, isn't it? Thanks! __________________ Old simple TT, cheap CDP with wise mods, Class T amp at its best: music!

24th May 2007, 05:32 PM	#3
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	X2 rating is simply a safety failure mode rating. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

24th May 2007, 07:16 PM	#4
Malefoda diyAudio Member Join Date: Jun 2006	So X2 is not a sound problem, MKP rules Here is the pic of the output of my tuner, the closest resistors feeding the caps (my MKS here) are 2.2k. I don't know if they are the one you talked about Nordic, maybe to check the value of the caps? Thanks guys! __________________ Old simple TT, cheap CDP with wise mods, Class T amp at its best: music!

25th May 2007, 03:29 PM	#5
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, those two pots may be presets to control the level of signal fed to the amplifier. If you can read off or measure their resistance then that may help. The reason for asking is that a few components in the input are there to filter the signal before passing it to the amplifier. There are usually a low pass filter and a high pass filter. The series capacitor and the following resistor to ground form the high pass filter that blocks DC from entering the amp and also attenuates very low frequency signals. The bandwidth of the following amplifier should/could affect choice of capacitor value. The filtered signal should match the designer's specification and changing caps could change the way the amplifier behaves. __________________ regards Andrew T.

25th May 2007, 03:56 PM	#6
Malefoda diyAudio Member Join Date: Jun 2006	Ok I see, but... can I use something I've got here ? __________________ Old simple TT, cheap CDP with wise mods, Class T amp at its best: music!


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24th May 2007, 04:47 PM	#2
Nordic diyAudio Member Join Date: Sep 2005	What is the value of the resistor it is connected to...?

25th May 2007, 04:29 PM	#7
Malefoda diyAudio Member Join Date: Jun 2006	I'll try to draw the output of my tuner to help. __________________ Old simple TT, cheap CDP with wise mods, Class T amp at its best: music!

25th May 2007, 05:10 PM	#8
Nordic diyAudio Member Join Date: Sep 2005	you can try the .22uf, but it will likely sacrifice some low frequency extention. As said above, stick to original values, play round with types if you want to... those red caps (WIMA?) are normally fine...

25th May 2007, 05:12 PM	#9
Malefoda diyAudio Member Join Date: Jun 2006	OK thanks! __________________ Old simple TT, cheap CDP with wise mods, Class T amp at its best: music!

29th May 2007, 02:34 PM	#10
Malefoda diyAudio Member Join Date: Jun 2006	Got Wima MP3 0.33uF, do this sounds good or at least like the MKS? At least they are the right capacity. Like these: __________________ Old simple TT, cheap CDP with wise mods, Class T amp at its best: music!

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