Re: Beginner Q's

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "david baehr" <dfb25@xxxxxxxxxxx>


R. Hull had a great tape on rolling your own caps, take you by the 
hand , step by step. I built three caps back around '93 I think, 
maybe had three failures to date , I think thats pretty good. They 
are still in service today. Back in the mid '90s , I worked any early 
shift , and got home around 12:30 in the afternoon, when no one was 
home and ran my 5kw coil in the basement almost every day, and never 
had a rolled cap fail. But, if you want portability, forget it, they 
are a pain in da butt to haul around. See if Richard Hull still has a 
VHS on cap construction,.....I think maybe the high failure rate some 
folks have could be due to defets in the poly, I may have been lucky, 
Have fun!!

From:  "Tesla list" <tesla@xxxxxxxxxx>
To:  tesla@xxxxxxxxxx
Subject:  Re: Beginner Q's
Date:  Wed, 16 Nov 2005 18:30:09 -0700
>Original poster: BunnyKiller <bunikllr@xxxxxxx>
>
>hey flea...
>
>hmmm   building your own cap huh?   only masochistic people build
>thier own cap ;)   I was masochistic 3 times :)
>
>Answer 1  try McMaster Carr for PE material in various thicknesses
>
>ans 2        as tight as you can get it    be prepared to reroll it
>several times since they never roll right the first time
>
>ans 3         PVC pipe is kewl   make the bottom glue sealed but
>make the top removeable since the cap will fail eventually (
>actually alot soooner than you would expect)
>
>ans 4         Ty -Wraps of course  :)
>
>ans 5            rolled cap hmmm    run a strip of material folded
>in half along the begining of the "inside plate" at the begining of
>the roll  and another on the outer plate at the end of the roll
>that way you will have 2 connect points  (( one for each plate) that
>are as far as away as possible from each other.
>
>
>Scot D
>
>
>
>Tesla list wrote:
>
>>Original poster: Michael Brooks <screaminfleadesigns@xxxxxxxxx>
>>
>>I am working on the cap for my coil and have some probably
>>rudamentary questions.
>>
>>The dialectric I have chosen is high density polyethylene and the
>>plates are to be roof flashing.
>>I used the Teslac program by Mark Graalman for the perameters and
>>found that using 40mil poly and 60" X 14" flashing would give me
>>.019uf @ 8kV.  The transformer is an Allanson NST 15kV @ 30ma. The
>>trans/cap matching program stated the trans could handle .0038uf
>>and would need to be rated at least 37500v for stability.
>>
>>I figure I will need to build 5 caps and put them in series, this
>>will give me the .0038uf I need and a 40Kv rating.
>>
>>Q1: Where can I find 40mil poly?  The closest I have found is a 6
>>mil at a hardware
>>store and I assumme I cannot just use multiple layers to get the 40
>>mils.
>>
>>Q2: How tightly does this cap ne ed to be rolled as far as the ID
>>of the completed cap coil?
>>
>>Q3: I have 6 gallons of transformer oil for the caps but am looking
>>for ideas about the container for them - would setting the rolls
>>inside PVC pipe and capping the ends be feasible?
>>
>>Q4: What are some ways to band the completed cap coil so it does
>>not fly apart?
>>
>>Q5: What are some methods and materials for attaching leads to the
>>cap plates?
>>
>>Thank you all for your input,
>>
>>'Flea
>>
>>_____
>>
>>
>
>
>