a6ffac0a   
   From: none@nospam.org   
      
   Ordinary mineral oil from the drugstore will work fine.  You do not need   
   200 weight oils.  If you want to go exotic, use castor oil.  Paper of any   
   sort will increase the loss tangent and dielectric absorption.  Stick   
   with PTFE or polystyrene if you need excellent caps, or polypropylene if   
   price is a concern.  But what a waste of time!   
      
   If you are trying to recreate oil-filled caps of long ago, I will be glad   
   to supply you some polychlorinated biphenyls.  Free! (I do not have to   
   pay   
   to discard it!)   
      
        Barry   
      
      
   "steppe"  wrote in message   
   news:029256f7-62e1-4d6f-b47a-7e283715ab08@d37g2000yqm.googlegroups.com...   
   >I thought of this while looking at a german guy's site (sorry I dont   
   > have the link) where he detailed his own homemade paper caps. I   
   > thought maybe I could go him one better and make PIO caps.   
   >   
   > I'll need foil, probably copper, though tin would suffice. I bought   
   > some copper foil for shielding guitars about ten years ago, enough to   
   > try doing this, but it's a little too thick for caps. It doesn't need   
   > to be real thick, just thick enough to handle without breaking.   
   >   
   >   
   > Paper could be anything that doesn't short through. It needs to be   
   > thick enough to resist shorts up to 600 volts. I'm guessing any kind   
   > of paper would do, but something like fisch-paper (or is it fishe-   
   > paper?) would be best, since it's made as an electrical insulater.   
   >   
   >   
   > Oil is perhaps the easiest thing to get. I used to work in an HVAC/R   
   > warehouse and they had plenty of oils up to 200 weight (as well as   
   > motor run PIO caps! I ran over one once with a forklift,   
   > accidentally,   
   > and found out it was PIO) . Some were synthetic and kinda pricey, but   
   > I only need a little for each cap. I'm sure I could ask around if I   
   > needed anything exotic, maybe get a sample from a tech or something.   
   > If plain motor oil works fine I wont have any trouble.   
   >   
   >   
   > Packaging all this is where it gets tough. I bought some Sprague   
   > bathtub caps ( .05 and .1 ufd ) and it would be cool to solder   
   > together a little container for them. I don't have a clue how to do   
   > any of this yet, but I would like to get a website together and post   
   > the results of my experiments.   
   >   
   >   
   > Does anyone have any info on these? Anything would be helpful, and   
   > you   
   > can email me directly at steppenvalve7 at gmail dot com. Thank you.   
   >   
      
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