Hi RD,
There are two parameters to consider for and NST 1) Voltage, 2) Current.
Since E x I = P this determines the maximum power available and thus the size of the coil that can be driven. Since the maximum width for a spark gap is nominally 0.5mm / KV a lower voltage transformer will require more critical adjustment. (7kV~=3.5 mm Max) unless yoou use a voltage doubler circuit.
Over the years (50+) I have used Alanson, Franceformer, and Actown NSTs with reasonable results. You will want to get "Old-style" NSTs that weigh about "2 hernias". The modern lightweight ones use either higher frequency circuits, or are full of fault detection equipment that renders them useless for TCs.
Check the list archives for details and discussion.
Matt D.
-----Original Message-----
From: rd_parker <rd_parker@xxxxxxxx>
To: tesla <tesla@xxxxxxxxxx>
Sent: Thu, Jul 31, 2014 8:08 pm
Subject: [TCML] Neon Sign Transformers-Recommendations.
Gentlemen,
I am quite new to the hobbie, for lack of a better word, known as Tesla
Coil design. I am running some of my own calculations based upon
personal and collective analysis of those much smarter than I. However, I
would appreciate if any of you have any recommendation for NST's, i.e.,
manufacturer, quality, etc. I am afraid my research so far is so
sketchy, and I have not even a voltage to work with. However, I am
assuming that a single NST around 7000 volts and above will be an
adequate source of voltage to work from. Any help you can provide would
be much appreciated.
Regards, RDP, Bellflower, CA.
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