Re: Airtight Coil form

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>" <Mddeming-at-aol-dot-com>

In a message dated 3/14/01 12:58:57 AM Eastern Standard Time, 
tesla-at-pupman-dot-com writes: 


>
> Original poster: "Stolz, Mark by way of Terry Fritz <twftesla-at-uswest-dot-net>" < 
> Mark.Stolz-at-st-systems-dot-com> 
>
> Hi all, 
>
> My name is Mark and I'm beginning to get started into coiling.  I've been 
> reading lots from this list, and there is A LOT to read, and I've been 
> reading at tons of TC websites.  I haven't been able to find an answer to 
> the question of why does the coil form need to be airtight.  I thought it 
> might be due to internal arcing, but that didn't make sense since arcs can 
> still happen in a vacuum.  I figured this would be the best place to get an 
> answer from, since a majority of you are what I would consider experts. 
> Thanks! 



Hi Mark & All! 
      I don't see an airtight secondary as being necessary or safe. Coils 
get very warm (some hot) and an airtight one would be subject to blowout (or 
up). One might use a single, sealed spark barrier in the middle of a coil 
form with both ends of the form vented, but an airtight form (unless maybe 
running partial vacuum inside) sounds very strange to me. 

Matt D.