Re: First Lights

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Malcolm Watts by way of Terry Fritz <twftesla-at-qwest-dot-net>" <m.j.watts-at-massey.ac.nz>

Hi Steve,

On 8 Jul 01, at 11:03, Tesla list wrote:

> Original poster: "S & J Young by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<youngs-at-konnections-dot-net>
> 
> List,
> 
> This is a report of first lights (as in one light per twin coil) from a DC
> powered twin TC with an unusual RSG.  The RSG is configured to work like a
> SPDT switch.  It has 8 rotating electrodes and two pairs of stationary
> electrodes.  The design is such that one pair of electrodes fires every 45
> degree of rotation, and the other pair likewise fires, but 22.5 degrees
> later.  So, for example, at 0 degrees, the DC supply charges the tank cap,
> and at 22.5 degrees, the tank cap discharges through the primary.  This
> completely isolates the power supply from the tank circuit.  No ballast or
> filters are needed.
> 
> It works!  Independent control of input power and break rate is fun to play
> with.  It is amazing how the discharge length dramatically increases with
> break rate.  Going from about 16 BPS to 240 BPS roughly triples the spark
> length.
> 
> Also interesting is how puny the arc is for the RSG charging (power supply
> side) electrodes compared to the sound and fury of the arc across the
> discharge (tank circuit) electrodes.  One would think they would be the same
> magnitude (energy into the tank cap =energy out of the tank cap), but they
> aren't.  I do have a 750 ohm 110 watt resistor in series with the power
> supply feed to the RSG to keep from popping microwave oven diodes in the
> power supply (peak current limited to be about 1.3 amps).  I suppose that
> could account for the difference in the electrode arcs.

You are probably seeing the difference between a discharge into the 
tank (100's of Amps) vs a charging current of a few 100's of mA to an 
Amp or two.

?
Regards,
malcolm