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Re: secondary question...

Original poster: "resonance" <resonance@xxxxxxxxxxxx>
It's not the dia. of the coil that determines whether or not a baffle is necessary. It's the spark length as compared to the length of the coil. Anytime a spark length approaches or exceeds coil length a baffle should be employed. It's easy and time efficient as compared to hours of sanding, resealing, and perhaps rewinding a secondary that has flashed over internally. 

Dr. Resonance
----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Sunday, October 08, 2006 11:28 PM
Subject: RE: secondary question...



Original poster: "Jim Mora" <jmora@xxxxxxxxxxx>

Hi,

Interesting Idea. Anyone know if the foam stuff is polyethylene? Little loss
in that case. You could just put end caps on it. Do 4" coils even need a
central baffle?

Jim Mora

-----Original Message-----
From: Tesla list [mailto:tesla@xxxxxxxxxx]
Sent: Sunday, October 08, 2006 7:11 PM
To: tesla@xxxxxxxxxx
Subject: secondary question...

Original poster: Slurp812 <slurp812@xxxxxxxxx>

OK, so I got some PVC, and been doing research on secondarys. It was
sugested somwhere that baffles be installed on the inside. OK, so I
was thinking of a quick and dirty way of sealing up the inside. What
if I were to just fill the inside of the secondary PVC pipe with
expanding foam? Do you think that would work, or make it more lossy?