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.
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
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
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
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
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.
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
-Chris
Hi Tweeker,
Cool. That answers that. Of course you wouldn't use it dry. It would take on water. Don't want that. Therefore you need to impregnate it with something first.
-Chris
Cool. That answers that. Of course you wouldn't use it dry. It would take on water. Don't want that. Therefore you need to impregnate it with something first.
-Chris
Hi Tweeker,
There is an interesting entry in there. The "Loss Tangent" for silicon is 0.005 @ 1 GHz, a vacuum is 0 I guess. One reason for a difference in sound between SS and tubes? For comparison, a polystyrene cap has a loss of 0.00033 @ 3 GHz. Hmmmm.
-Chris (see, I read the linked page)
There is an interesting entry in there. The "Loss Tangent" for silicon is 0.005 @ 1 GHz, a vacuum is 0 I guess. One reason for a difference in sound between SS and tubes? For comparison, a polystyrene cap has a loss of 0.00033 @ 3 GHz. Hmmmm.
-Chris (see, I read the linked page)
serengetiplains said:
Ah, ok. By the way, some of the separator papers used for capacitors are made of hemp rather than wood fiber.
Also, Steve Bench did some linearity tests on a variety of caps including a number of film caps and the PIO performed as good or better than the film caps.
If you're not already familiar with it:
The "Sound" of Capacitors
se
My goal is to make a capacitor with a dielectric constant <1.9.
For low voltage use, perhaps a dielectric like a loose-weave silk or cotton would work well? Anyone think why not?
For low voltage use, perhaps a dielectric like a loose-weave silk or cotton would work well? Anyone think why not?
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