Re: [TCML] Optimizing coil performance

["David Rieben" <drieben@xxxxxxxxxxx>]

Hi John,


Yes, my Green Monster will occasionally APPROACH
15 ft. sparks on a good day, but generally 11 to 13 ft 
is pretty much where it tops out, even when I push up
to 90 amps at 240 to 260 volts into the power transfor-
mer (14.4 kV, 10 kVA pig). Now the sparks DO get
progressively brighter, louder, and more frequent as
I push the power inut past say 50 amps, but they don't
really reach out significantly any further on up to 90 amps
or so. I'm sure all of these factors add up to limit my spark 
length to around 13 to 14 ft and to get significantly longer
sparks, I would have to upgrade to a physically larger
coil.

David



----- Original Message ----- 
From: <futuret@xxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Wednesday, August 13, 2008 4:27 PM
Subject: Re: [TCML] Optimizing coil performance


Hi David,

Regarding the secondary length, I think Richard Hull's Nemesis
secondary was either 48" or 46" long and he got 15 foot sparks.
But his secondary was wider at 14" and his toroid was very large
at 60" dia or so.

John


-----Original Message-----
From: David Rieben <drieben@xxxxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Sent: Wed, 13 Aug 2008 6:31 pm
Subject: Re: [TCML] Optimizing coil performance


Hi John, 
Agreed, and I've also found that it can be equally as 
difficult to get spark lengths >3X the length of the se- 
condary coil (assuming a classic 2-coil system). Of course, David's 
secondary is 48" long so he should still be good for up 12 ft. sparks 
from this parameter, too, assuming he upsizes his toroid according to 
both yours and my suggestion. :^) 

David Rieben 
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