Dielectric Constant of Kraft Paper

serengetiplains · 8th December 2005, 01:15 AM

Anyone know the dielectric constant of kraft paper? I seem to recall it's pretty low .... in the neighbourhood of 2, but I don't know why I think that and the source of that thought might in any event be quite unreliable.

anatech · 8th December 2005, 02:06 AM

Hi Tom,
I did a search using your title. Here is one link, kraft paper having a DA of 4

Click here or here or here

-Chris

serengetiplains · 8th December 2005, 02:15 AM

Ouch, that's high. Thanks Chris.

Tweeker · 8th December 2005, 02:23 AM

This source puts it at 2.

Tweeker · 8th December 2005, 02:29 AM

This one attributes a value between 1.5 and 3. Craft paper is a kind of nebulous item, its not something whos dielectric value is set in platinum-iridium. The oil you use is also important.

serengetiplains · 8th December 2005, 02:40 AM

Thanks, Tweeker.

Tweeker · 8th December 2005, 03:08 AM

Hmm, the clippercontrols link I listed also listed this:
Gerber Oatmeal (In Box ) 1.5

anatech · 8th December 2005, 08:33 PM

Hi Tweeker,
Yes, you are correct. But if you search the first article, it's listed at a value of 4. They also mention the oil type and the fact that it will change the dielectric constant if you change the oil.

That's why I posted the link to the article.

-Chris

TwoSpoons · 8th December 2005, 09:14 PM

Which suggests that '4' is really the dielectric constant of the oil, and the kraft paper is just there to hold the oil in place.

anatech · 8th December 2005, 09:36 PM

Partially. I don't know what the DC is for dry kraft paper. You would have to measure it in a nitrogen (or similar gas) atmosphere so the paper really is dry.

-Chris

8th December 2005, 01:15 AM	#1
serengetiplains diyAudio Member Join Date: Feb 2004 Location: Canada	Dielectric Constant of Kraft Paper Anyone know the dielectric constant of kraft paper? I seem to recall it's pretty low .... in the neighbourhood of 2, but I don't know why I think that and the source of that thought might in any event be quite unreliable. __________________ Tom

8th December 2005, 02:15 AM	#3
serengetiplains diyAudio Member Join Date: Feb 2004 Location: Canada	Ouch, that's high. Thanks Chris. __________________ Tom

8th December 2005, 02:23 AM	#4
Tweeker diyAudio Member Join Date: Dec 2004 Location: Cincinnati, Ohio	This source puts it at 2. __________________ Be sure your foil hat has a good low impedance ground.

8th December 2005, 02:29 AM	#5
Tweeker diyAudio Member Join Date: Dec 2004 Location: Cincinnati, Ohio	This one attributes a value between 1.5 and 3. Craft paper is a kind of nebulous item, its not something whos dielectric value is set in platinum-iridium. The oil you use is also important. __________________ Be sure your foil hat has a good low impedance ground.

8th December 2005, 02:40 AM	#6
serengetiplains diyAudio Member Join Date: Feb 2004 Location: Canada	Thanks, Tweeker. __________________ Tom


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8th December 2005, 02:06 AM	#2
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi Tom, I did a search using your title. Here is one link, kraft paper having a DA of 4 Click here or here or here -Chris

8th December 2005, 03:08 AM	#7
Tweeker diyAudio Member Join Date: Dec 2004 Location: Cincinnati, Ohio	Hmm, the clippercontrols link I listed also listed this: Gerber Oatmeal (In Box ) 1.5 __________________ Be sure your foil hat has a good low impedance ground.

8th December 2005, 08:33 PM	#8
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi Tweeker, Yes, you are correct. But if you search the first article, it's listed at a value of 4. They also mention the oil type and the fact that it will change the dielectric constant if you change the oil. That's why I posted the link to the article. -Chris

8th December 2005, 09:14 PM	#9
TwoSpoons diyAudio Member Join Date: Oct 2004	Which suggests that '4' is really the dielectric constant of the oil, and the kraft paper is just there to hold the oil in place.

8th December 2005, 09:36 PM	#10
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Partially. I don't know what the DC is for dry kraft paper. You would have to measure it in a nitrogen (or similar gas) atmosphere so the paper really is dry. -Chris

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