Re: questions about tank capacitor (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: List moderator <mod1@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Thu, 31 May 2007 14:22:34 EDT
From: Mddeming@xxxxxxx
To: tesla@xxxxxxxxxx
Subject: Re: questions about tank capacitor (fwd)

 


Hi Dan,
 
1) The LTR value is a function of the physical size (rating) of your power  
transformer, not the voltage you apply at any moment. 
2) Most variacs are continuously variable rather than step-variable and  
start at 0 V. Do you have a custom one?
 
Matt D.
 
 
In a message dated 5/31/07 10:59:31 A.M. Eastern Daylight Time,  
tesla@xxxxxxxxxx writes:

---------- Forwarded message ----------
Date: Thu, 31 May 2007  03:00:36 +0000
From: d.grieves90@xxxxxxxxxxx
To:  tesla@xxxxxxxxxx
Subject: questions about tank capacitor

Hello  everyone,

I am building my first tesla coil and have many questions. I  plan to power
my coil with a 15 kV 30mA 450VA neon sign transformer with a  variac to
control the output, probably from 6 kV to 15 kV in steps of 1 kV  or so. I
am using a static gap made up of multiple gaps in series, allowing  me
change the total gap size to fit the voltage of each step. But I  don't
know what value my tank capacitor should be. I am planning to use the  LTR
value for the transformer at full voltage (0.008uF). At the lowest  voltage
settings however, this would be considerably less than the resonant  value.
Is this OK? Or should use the LTR value for the lowest voltage (6  kV), or
maybe somewhere in between? I would greatly appreciate any  suggestions or
guidance, 
thanks. Dan







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