Three things to consider:
1) .Is the 7.5 turns a calculated best position or an emperically tested best position?
2) .80 BPS is way too slow.
3) Running NSTs in asynchronous mode is one of the best ways to kill them.
Matt D
26, 2015 at 7:59 AM, William Howard <snakeprior@xxxxxxxxx>wrote:
> Heymate,
> Check your quenching and timing. This can have a huge effect on
>performance.>
> -Wil
> On 26/02/2015 8:04 PM, "Kuba Anglin"<kubaanglin@xxxxxxxxx> wrote:
>> > Hello,
> > I recently finished buildingmy second Tesla coil.
> > Here are the specs:> >> >> > - 2 parallel12KV 60mA neon sign transformers 12KV 120MA
> > - 2000V .15uf capacitors. 6strings of 13 (78 total). 69nf.> > - Rotary spark gap 1780rpm with 3tungsten electrodes.
> > - Resonant frequency: around 110KHz> > - 1/4"primary coil (tubing) 10 turns, 7.5 turns for optimal spark.> > - 24 AWGsecondary. 6" form (6.625"). 1240 turns. 30" wind height.> > - 24"x6" SpunAl toroid> >> > After firing up the coil, I was disappointed to see only1-2' sparks. My> > previous 4" coil that uses only one transformer couldoutput about 3'> > sparks. The primary is properly tuned and the spark gapfires about 80> > times per second as it should. I double-checked the wiringand it looks> > great. I must be missing something, but I cannot figure itout. I 3D> > printed the primary standoffs to perfectly hold the primary coil.The> > secondary coil is perfectly wound and glazed. The transformers arefully> > functional. The whole coil should operate at around 1800 watts(including> > the motor). Here are some links to pictures of the coil: Teslacoil> > <http://s11.postimg.org/50b6jpg6r/Large_Tesla_coil.jpg>, Spark Gap>> <http://s1.postimg.org/xfowkeppr/Spark_gap.jpg>. Here is a video of the> >first run: Test <https://www.youtube.com/watch?v=n5gSaWPfZH4>.> >
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