Re: Filling caps with oil

From: 	Jim Fosse[SMTP:jim.fosse-at-bjt-dot-net]
Reply To: 	jim.fosse-at-bjt-dot-net
Sent: 	Wednesday, December 03, 1997 1:06 PM
To: 	Tesla List
Subject: 	Re: Filling caps with oil

On Tue, 2 Dec 1997 23:32:59 -0600, Tesla List <tesla-at-pupman-dot-com>, you

>From: 	David Huffman[SMTP:huffman-at-FNAL.GOV]
>Sent: 	Monday, December 01, 1997 3:21 PM
>To: 	Tesla List
>Subject: 	Filling caps with oil
>Hello All,
>I finish 2 of the 3 caps this weekend and had a couple of questions for
>those who have been there before.  I added the oil and pumped on the cap
>with a refrigerator compressor. The oil foamed quite a bit and I had to stop
>pumping a few times to let it settle down. The Kraft paper seems to hold air
>in small spaces and generated tiny bubbles (foam). The trapped air seems to
>be diminishing and I hope to use the caps soon. How much pumping should I
>do? One problem is the terminals through the sides of the PVC pipe leak so I
>have to continually pump to keep a vacuum. I haven't figured a way to seal
>them although they don't leak oil. By the way 25 in-Hg seems to be the
>limit, does that sound about right? I will hall them into work tomorrow to
>check the capacitance on our fancy C-meter.
>More to come...
>Dave Huffman
	I did this on my first cap. You are boiling the oil in your
cap and generating oil bubbles. I would recommend the next time that
you pump a vacuum and then add your oil.