From: zekfrivo@zekfrivolous.com   
      
   In article , "Barry"    
   wrote:   
   >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!   
      
   Tyvek  ?   
      
   >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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