Re: [TCML] Single-ended NST, wiring

[jhowson4@xxxxxxxxxxx]

alright so apparently i missed something all these years. 

I thought you wanted to separate the two grounds and because the HV was grounded you should only use the RF ground in that system, but apparently not, you use both. 

You want to connect the ground on your transformer to the house ground, make your circuit like you have shone, and connect the bottom/inner turn of your primary to the base of your secondary. 

This is what DC Cox (Dr. Resonance ) did with his permanent coil installations (DC cox was a Tesla coil powerhouse, owning his own company and such that built them) 

" 
We always ground one of the HV bushings (either H1 or H2) to the main 220 volt ground. This then goes from the power supply over to the coil via standard 10 AWG THHN wire and when connecting to the spark gap, it also connects to the inside of the pri Tesla transformer copper tubing and also to the main RF ground. The base of Tesla coil sec also connects to the main RF ground. We then run a 2 ought fine stranded welding cable to our main bldg ref ground which is connected to 2 parallel external copper grounds outside. In our museum applications we always have them install a 2 ought welding cable from dual exterior bldg ground directly to the demo stage area where it terminates as the base of the Tesla sec coil, ie, main RF ground. Dr. Resonance " 



Thanks, 
John "Jay" Howson IV 


"Why thank you, I will be happy to take those electrons off your hands." 

----- Original Message -----
From: "Jacob Karlström" <94jac12@xxxxxxxxx> 
To: tesla@xxxxxxxxxx 
Sent: Saturday, March 2, 2013 3:07:51 PM 
Subject: [TCML] Single-ended NST, wiring 

Hello, 

The NST (4kV, 50mA) for my SGTC is a single end type with one of its 
secondary winding ends attached to the metal casing. I have seen schematics 
of other TCs with single-ended transformers, and they have all looked like 
this: http://www.physics.gla.ac.uk/~kskeldon/PubSci/images/tesla3.gif with 
the capacitor in parallel with the transformer and coil. However, I recall 
reading that a capacitor in parallel is not preferred in a TC using an NST. 
I am wondering if connecting the capacitor in series instead like this, 
http://imgur.com/JegqUiI, would work, or will there be any problems with 
the capacitor + ground? 

Regards, 

Jacob Karlström 
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