From: D.C. Cox [SMTP:DR.RESONANCE-at-next-wave-dot-net]
Sent: Tuesday, June 16, 1998 6:45 PM
To: Tesla List
Subject: Re: RSG Question
With non-snychro gaps, pole xmfr drive, and cap values from .04 to 0.2 MFD
a break rate of 450-480 pps seems to work best. Higher rates work well
with magnifiers but not classic coils with coeff. coupling in 0.18 to 0.2
> From: FutureT-at-aol-dot-com [SMTP:FutureT-at-aol-dot-com]
> Sent: Monday, June 15, 1998 8:56 AM
> To: tesla-at-pupman-dot-com
> Subject: Re: RSG Question
> In a message dated 98-06-14 02:12:26 EDT, you write:
> << ----------
> From: Gregory R. Hunter [SMTP:ghunter-at-enterprise-dot-net]
> Sent: Saturday, June 13, 1998 1:59 PM
> To: 'Tesla List'
> Subject: RSG Question
> Dear List,
> > Ever since I saw an RSG in operation at the UK Teslathon, I've been
> >contemplating building my first RSG. I'm curious though, about the
> > relationship between optimum tank cap value and RSG break rate.
> > Instinct tells me that at high or very high break rates, the tank
> > capacitor must be smaller than one optimized for a static gap
> > system. Does anyone have a rule or formula for selecting best
> >cap size based on both power supply and RSG break rate?
> Suffolk, UK
> The basic rule is that if you double your break rate, you should use
> half as much capacitance, for the same input power. A static gap
> will automatically adjust its break rate based on the cap size and
> power available...provided the quenching is good. Using the rotary
> gap, if you increase your break rate, without providing more power
> input, the caps will charge to a lower voltage. Either a static
> or a rotary can have a high or a low break rate.
> I used to like high break rates and small capacitors, but I now
> prefer low break rates and larger capacitors for a given power
> input. With high break rates the sparks will be brighter, and more
> frantic in motion. Low break rates will produce dimmer, slowly
> floating, longer sparks IMO. However what I just said seems to only
> be true at relatively low power levels. At higher powers, the frantic
> motion may not develop, even at faster break rates. And this may
> be affected by toroid size or other factors perhaps. So there seems
> to be a few mysteries *out there*.
> I suspect that a low break rate with a large cap will give longer
> sparks even at high powers, but I don't have the room to do the
> tests. Perhaps someone on the list will do these kinds of
> comparisons to help settle the matter.
> Have fun, but safety first,
> John Freau