Re: [TCML] party cup capacitors

[johnbrooks@xxxxxxxxxxx]

I viewed your album a couple of times.
Very good work sir.
Joe in Texas

On Wed, 03 Nov 2010 03:24 +0000, jhowson4@xxxxxxxxxxx wrote:
> I swear by my home made poly rolled capacitors. 
> 6mil polyethylene, a lot of aluminum foil, flashing, electrical tape is
> the way to go in my book. 
> I over engineered then to withstand 50kv and as such have never had one
> fail. 
> 
> I bought a roll of the poly at lowes a few years back when they where
> having a going out of business sale....I am still using the same roll to
> make my caps. one of the tricks that i found was to tap each plate on
> every turn of the roll..to minimize inductance. 
> 
> and if you do it wrong you have only lost a couple of hours and maybe
> 10-15 bucks depending on how big you are making it. 
> 
> my first 2 caps each cap is rated for.1uf. the one on the left was the
> first try..it still works like a champ to this day. 
> http://s139.photobucket.com/albums/q295/JHowson/mad%20science/?action=view&current=Closeup.jpg 
> 
> i really don't remember what this one was rated for. You can sort of see
> the PVC pipe in this one. the cap is under mineral oil and sealed via
> lexan and lots and lots and lots of epoxy. 
> http://s139.photobucket.com/albums/q295/JHowson/mad%20science/?action=view&current=DSC06578.jpg 
> 
> Thanks, 
> John "Jay" Howson IV 
> 
> ----- Original Message ----- 
> From: "david baehr" <dfb25@xxxxxxxxxxx> 
> To: tesla@xxxxxxxxxx 
> Sent: Tuesday, November 2, 2010 10:02:37 PM 
> Subject: RE: [TCML] party cup capacitors 
> 
> 
> ...here I go again, 
> 
> My Rolled ( TCBOR caps ) worked well through the years,....if carefully
> done, they hold up well,...but that was back in the early 1990's,....I
> would do MMC's now , but my rolled caps are still in service :-) 
> 
> 
> 
> > From: jpeakall@xxxxxxxxxxxx 
> > To: tesla@xxxxxxxxxx 
> > Subject: Re: [TCML] party cup capacitors 
> > Date: Tue, 2 Nov 2010 15:45:47 -0700 
> > 
> > For my money, the only DIY caps worth building are salt water caps. Lossy 
> > and heavy yes, but can be quite tough and cheap. All of my efforts in other 
> > types, rolled, plate, etc never lasted and always left a mess to clean up. 
> > The SW caps you can dump and recycle. 
> > 
> > Jonathan 
> > _______________________________________________ 
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-- 
  
  johnbrooks@xxxxxxxxxxx

-- 
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