Re: Almost done

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

Original poster: "by way of Terry Fritz <teslalist-at-qwest-dot-net>" <dhmccauley-at-spacecatlighting-dot-com>

You didn't mention it, but are you tuning your primary everytime you change
your topload.  Each topload will have a different capacitance and will
change the secondary resonant
frequency.  You WILL have to retune the primary everytime you change the
topload.

If you have access to some LEDs and a oscillator (for example, HP 200 audio
oscillator), you can easily measure approximately the primary and secondary
resonant frequencies
to see if you are even in tune.  To me, it sounds like your coil isn't in
tune.

Dan




 >   My class finished our coil with everyones help. Our only problem is we
 > get corona from the top of the secondary, but no matter what topload we
try
 > we just can't get streamers. we have a 12kv nst, "six-pack beer bottle"
 > caps, a flexible spark gap built out of 1/4" tubing, which all feeds a
 > primary of 14 turns of 1/4" copper tubing (flat).  Our secondary is 4" PVC
 > wrapped with 1000 turns of 22 ga magnet wire. We have tried the gazing
ball
 > route (yes I made sure it was glass) and we also tried 3" flex duct. We
got
 > some neat arcs to the top load and tried adjusting the distance from the
 > secondary to the top load, but we never could get any streamers or corona
 > from the top load. Any advice would be greatly appreciated. Thanks
 >
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