Re: [TCML] Baffle tally (was Secondary Troubles)

[futuret@xxxxxxx]

Hi Gary,



I wasn't following the thread carefully, but now I understand 
what is being talked about by baffles.?? I remember some posts
from a few years ago in which some folks said their secondaries
tended to fail without such baffles.? I don't remember the exact
situation with my over-driven secondary.? It may have even been
a tube coil experiment.? In one VTTC test, I used a 7" tall
secondary to produce a 34" spark.? But I don't remember if that
was the one where I saw the flash through the inside of the
secondary.??Actually I think I was doing something different.
I seem to remember the secondary "lighting up"
when the flash went through.? Possibly in my notes I have some
information.? In any case when I saw the flash, I just reduced the
power or whatever.? I didn't attempt to seal the tube.? But in the
case when the flash occured in my coil, I most likely had no
end caps at all.? Instead I had only?cross-bars.? So the secondary
was open to the air at top and bottom of the secondary.? I was
most likely over-driving my coil to a?ridiculous degree to see
how much it could withstand.? I had done a lot of those types
of tests a number of years ago.? 
I agree with you that very few folks use baffles, yet they never
have flashovers.? I'm tempted to say that I'm baffled by why
some coils need baffles, but I won't say that.? 

Cheers,
John





-----Original Message-----
From: Lau, Gary <Gary.Lau@xxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Sent: Sat, 5 Jul 2008 8:41 pm
Subject: RE: [TCML] Baffle tally (was Secondary Troubles)



Hi John,

I think the point to the thread was about adding sealed disks several inches in 
from each end of the form - different than simple end caps.

Not sure about how to classify your "greatly overpowered" secondary.  If it's a 
case where having added some internal sealed disks would have prevented 
damage,then it should be counted as such.  But if you were trying to channel 
2KVA into a 12" long secondary, then it should be discounted, as nothing would 
have helped.  Uugh, this is where it gets tricky.  Unless no one at all reports 
using sealed baffles...

Regards, Gary Lau
MA, USA


> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf Of futuret@xxxxxxx
> Sent: Saturday, July 05, 2008 8:01 PM
> To: tesla@xxxxxxxxxx
> Subject: Re: [TCML] Baffle tally (was Secondary Troubles)
>
>
> Hi Gary,
>
>
>
> I built 6 secondaries without baffles and without end caps,?I think one of 
them
> had an internal flashover one time when I greatly overpowered the coil.? It
> didn't cause any damage because the form was made of Lucite.? When
> I say there were no end caps, I mean there was just a crossbar at the
> top at bottom, which did not fully block the form.? I can look right down
> through the form from the top and see out through?the bottom.
>
>
> I built 2 secondaries with end caps (not glued), these did not have
>
> any flashovers.? There were no extra baffles other than the end caps.
>
> I'm not sure if you're refering to end caps or extra baffles placed
> somewhere at the middle of the secondary?? I've never used such
> extra baffles.?
>
> Cheers,
> John
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla
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