Re: MMC size and rotary gap (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: List moderator <mod1@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Thu, 17 May 2007 03:37:20 -0500
From: Andrew Nettles <anettles@xxxxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: Re: MMC size and rotary gap (fwd)

Thanks - my intuition told me something like that but it's nice to hear it 
from someone on the list.  I'll go ahead and get the larger transformer and 
make a "proper" 6 inch coil.  Also, nice to know that I have a handle on 
this capacitor sizing thing - I appreciate your input.


>From: "Tesla list" <tesla@xxxxxxxxxx>
>To: tesla@xxxxxxxxxx
>Subject: Re: MMC size and rotary gap (fwd)
>Date: Wed, 16 May 2007 20:19:05 -0600 (MDT)
>
>Original poster: List moderator <mod1@xxxxxxxxxx>
>
>
>
>---------- Forwarded message ----------
>Date: Wed, 16 May 2007 18:39:34 -0700
>From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
>To: Tesla list <tesla@xxxxxxxxxx>
>Subject: Re: MMC size and rotary gap (fwd)
>
>Hi Andrew,
>
>Ok, so going with a rotary (SRSG). Your MMC LTR values are correct for
>both cases. It's really up to you. When money is the deciding factor,
>weigh the $30 for the 3rd NST to the difference in caps for the two
>cases. Likely, you will be pretty much at a wash for costs. Labor may
>really be the deciding factor.
>
>I personally would go with the 15/60 due to the cap labor and cost and
>due to a single NST (more compact and physically practical).
>
>Take care,
>Bart
>
>Tesla list wrote:
>
> >Original poster: List moderator <mod1@xxxxxxxxxx>
> >
> >
> >
> >---------- Forwarded message ----------
> >Date: Tue, 15 May 2007 20:40:20 -0500
> >From: Andrew Nettles <anettles@xxxxxxxxxxx>
> >To: tesla@xxxxxxxxxx
> >Subject: MMC size and rotary gap
> >
> >I'm trying to decide if I should use three 9kV 30 mA transformers or go
> >ahead and spend the money and buy a 15 kV 60 mA.  I know the latter would
> >provide a little more power, but I already have two Franceformers that 
>are
> >matched and I can buy another one for $30.  I'm also not sure about 
>removing
> >the GFI from the higher voltage Franceformers (I think it's easy, just 
>not
> >sure).
> >
> >So thinking about building the MMC.....I'll be using a 120 bps SRSG.
> >According to some stuff I've read, I should use a LTR cap of 2.5 to 3 
>times
> >the Cres - right?  So for the 3-9kv, I would need 66nf (26.5 x 2.5) or if 
>I
> >bought the bigger transformer I'd need 27nf.
> >
> >I'm trying to figure out which would be the cheaper/better way to go 
>since I
> >might end up spending so much more on capacitors that I should have just
> >bought the bigger transformer.  Any input on this?
> >
> >Thanks,
> >Andrew N
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
>
>