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RE: Undamped oscillations
Original poster: "Lau, Gary" <Gary.Lau@xxxxxx>
Yes, I stand corrected. I had an AC-powered mindset and was thinking
how my sync RSG is so very far from a perfectly periodic break rate.
But indeed, when using a DC-powered setup, it will be far more stable
and you're free to arbitrarily vary the RSG RPM to tweak the phase.
Thank you Ed for the reference to Marconi's "timed spark discharger".
Googling this I found an excellent page at
http://hjem.get2net.dk/helthansen/marconi_tx.htm that goes into nice
detail about the operation of such hardware. I'm still not sure that I
would call the result "undamped", but at least it is more or less CW. I
wonder just what visibility Tesla had into the actual waveforms?
Regards, Gary Lau
> Original poster: Mike <megavolts61@xxxxxxxxx>
> What would be so hard about that? If your coil is ringing down
> at 10kHz? and you fired it a 1000 pps......It would easily be
> done. I would assume the coil would be built suck that you get more
> than 20 cycles before the logrithmic decrement tookl it to
> zero. All you would need is a very well controlled rotary gap
> motor. heck....even up to 100kHz it could be done. If you have an
> even number of sets of stationary gaps hooked up on a ring....all
> paralleled..and an odd number of electrodes on the rotor, you can
> get quite a multiplier compared to a simple rotary gap with just one
> set of stationary gaps. Each set of stationary gaps would run
> cooller besides. Imagine four sets of stationary gaps...and three
> rotary electrodes. You'd get how many firings per rev? 12? next
> imagine 8 sets of stationary electrodes and nine rotary
> electrodes. I'll stop now....lol
> Original poster: "Lau, Gary" <Gary.Lau@xxxxxx>
> Anyone who has ever scoped the secondary activity on a disruptive coil
> can see that all activity is over long, long, long before the start of
> the next bang. With the inherent losses in any secondary system, this
> just is the way it is. Even if the BPS could have been increased to
> start a bang before the previous one died, I don't believe that the
> technology existed in Tesla's era to time spark gap firings with the
> phase of a ringdown.
> Gary Lau
> MA, USA