Gary Lau wrote:
I would disagree with this advice. Going between a static and SRSG gap entails, at a minimum, also changing the cap value and primary inductance. One cannot simply swap a static gap with an SRSG, leaving everything else unchanged. The capacitor needs to be a much larger value with an SRSG. If a properly sized cap for a static gap were used with an SRSG, the safety gap would fire non-stop. If a properly sized cap for an SRSG were used with a static gap, the NST would draw crazy-high currents. The tables relating proper cap size to NST parameters have separate columns for static/LTR and SRSG gaps. You'll be disappointed if you try to use the wrong cap size.
Perhaps you might have missed the part where I stated, "have a static gap to use at low voltage," or perhaps I should have specified exactly what I meant by low voltage.
For initial tuning of the primary tap at low voltage, I use ~40% of mains, and for the static gap, I use 0.025" (0.635mm).
As I stated, this is for initial tuning, NOT for full-power usage.Additionally, I neither stated nor suggested to use a SRSG in a system designed for a static gap.
Jon Danniken wrote:
You will still want to have a static gap to use at low voltage so you can get the primary coil at the right tap (use a ground rod near the toroid for this). Once the primary is properly tuned, then you can sub in your rotary gap, and adjust it for the proper gap presentation with your Freau controller.
Jon
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