Re: Cap Formulas (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: List moderator <mod1@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Wed, 13 Dec 2006 18:38:43 EST
From: Mddeming@xxxxxxx
To: tesla@xxxxxxxxxx
Subject: Re: Cap Formulas (fwd)

Hi Gary,
 
It's true that probably no one is going to get rich doing it, BUT....
 
In a message dated 12/13/06 5:39:19 P.M. Eastern Standard Time,  
tesla@xxxxxxxxxx writes:

---------- Forwarded message ----------
Date: Wed, 13 Dec 2006  15:20:56 -0500
From: "Lau, Gary" <Gary.Lau@xxxxxx>
To: Tesla list  <tesla@xxxxxxxxxx>
Subject: RE: Cap Formulas (fwd)

>Why  would it be useful to remove oils from handling, if it will
>ultimately  be submerged in oil?


Probably because oils from handling contain conductive salts.
 

>But more importantly, rolled caps have gone the way of the buggy  whip.
 
 
The manufacture and distribution of Model-T Ford parts is still a 
million-dollar business in the U.S. 
 
Ebay item # 260063956614 is a brand new buggy whip.
 

>While you may have a relatively good way to build them, no one will  want
>them.
 
 
Forty years ago, RCA announced the demise of the vacuum tube  amplifier.
Last year,  audiophiles sent over a million dollars to Russia because 
they were too "backward" to stop making tubes.
 
 
>No coiler who is aware of the state of the art of coiling  is
>going to buy a DIY rolled cap over an MMC, and it's doubtful that  the
>price or reliability could be made competitive with an MMC.  
 
 
I did, five years ago, from someone on this list, and it's still  going.
 
 
>The only appeal of a DIY rolled cap is that YOU made it, with no charge  for 
your
>labor.  If someone else makes it, their significant labor  and equipment
>investment is not free, and no personal pride.  Then  there's that nasty
>business of if you make and sell it, does it come with  any sort of
>warranty?




The one I bought also looks cool!
 
 
>Most HV commercial caps are made of multiple sections wired in  series,
>to keep any one section from seeing too high a voltage.  I  think
>something to do with corona inception voltage - an unavoidable  situation
>where a dielectric of any quality or thickness will degrade and  fail if
>exposed to the corona that occurs if the voltage is too  high.  A rolled
>cap must take the same thing into  consideration.


Good points to consider!
 

>Gary Lau
>MA, USA
 
Matt D.

Contrarian
 
"I'll build a state-of-the-art TC when they pry my last spool of  
double-cotton-covered wire from my arthritic fingers."