Re: V11.1 for JAVATC (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Thu, 30 Aug 2007 18:03:45 -0700
From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: V11.1 for JAVATC (fwd)

Hi Tony,

Consensus on voltage ratings varies in the two extremes. I am on the 
side of making the cap robust for longevity. But even that is relative 
to how long and hard you run the coil. There is degradation of the caps 
over use and time (this is a proven fact). Yes, you can get away with 
minimum deratings, but for how long? For some, it may be the life of 
their coiling experience and for others only a short while. You can 
however maximize the derating for voltage standoff and know that it will 
last a good long while even if you run the coil every day. That's what I 
prefer. At the time I built my own, I decided to error on the side of 
longevity.

The cost of a cap bank must be considered. When the cost is just too 
much for maximum derating, there are middle grounds between the extremes 
you may be forced to take. Cost increases with coil power which 
partially determines cap size, so when building a coil, it's wise to 
design and evaluate the cost before you build.

Take care,
Bart

Tesla list wrote:

>---------- Forwarded message ----------
>Date: Wed, 29 Aug 2007 17:39:08 -0700
>From: Anthony R. Mollner <penny831@xxxxxxxxxxxxx>
>To: Tesla list <tesla@xxxxxxxxxx>
>Subject: RE: V11.1 for JAVATC (fwd)
>
>Hi David,
>  Well, that seems to be what I've discovered as well. Now it's time to put
>a s@#t load of CDE caps together. What's the consensus on the voltage level
>for each string? I have heard of some guys running those 942C caps right at
>the transformer AC output, in my case 15kv but, that really doesn't sound
>wise to me. On the other hand, running strings of 21+ will cost an arm and a
>leg and various other body parts that I'd like to hang on to! So, what does
>everyone think would be nice and safe?
>
>Tony
>
>-----Original Message-----
>From: Tesla list [mailto:tesla@xxxxxxxxxx]
>Sent: Wednesday, August 29, 2007 5:47 AM
>To: tesla@xxxxxxxxxx
>Subject: RE: V11.1 for JAVATC (fwd)
>
>
>
>---------- Forwarded message ----------
>Date: Wed, 29 Aug 2007 12:44:50 +0000
>From: David Rieben <drieben@xxxxxxxxxxx>
>To: Tesla list <tesla@xxxxxxxxxx>
>Cc: drieben@xxxxxxxxxxx
>Subject: RE: V11.1 for JAVATC (fwd)
>
>Hi Tony,
>
>Well, let's see. 60 Hz mains resonance with a 15/120 transformer(s) is
>about .02 uFd and the general consensus on capacitor size with SRSGs
>in NST systems is about 2.8X resonant capacitance value, that would
>come out to .056 uFd. So .055 uFd sounds just about "right on the mo-
>ney" to me :^)
>
>
>David Rieben
>
>-------------- Original message --------------
>From: "Tesla list" <tesla@xxxxxxxxxx>
>
>  
>
>>---------- Forwarded message ----------
>>Date: Tue, 28 Aug 2007 07:23:48 -0700
>>From: Anthony R. Mollner
>>To: Tesla list
>>Subject: RE: V11.1 for JAVATC (fwd)
>>
>>I like this program, it's a real time saver. I was surprised at the
>>capacitor value it figured for my set up. I'm running a 15/120 input with
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>a
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>>SRSG and the value that JAVATC gave me of .055 for LTR. This was a lot
>>higher than I would have imagined, does that sound right?
>>
>>Tony
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