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Re: 4" MOT 4stack First Light
- To: tesla@xxxxxxxxxx
- Subject: Re: 4" MOT 4stack First Light
- From: "Tesla list" <tesla@xxxxxxxxxx>
- Date: Sun, 26 Jun 2005 13:02:04 -0600
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- Resent-date: Sun, 26 Jun 2005 13:13:15 -0600 (MDT)
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Original poster: Bob81818@xxxxxxx
My static gap is a tcbor style with 8 gaps, but I'm only using
three, for a total of about .111 inch gap. I'm using a microwave fan as of
right now, but I'm greatly considering a blower with a higher air flow. So
far the higher the fan speed the better the output. I set both the main and
safety using just the xformer. The main so it would fire consistently when
I applied power across it, and the safety so it just wouldn't fire.
Original poster: Chris TheGreat <downnessisgoingup@xxxxxxxxx>
Nice job, my coil (which I need to get out and work on again) is
nearly identical, although my tank cap is half the size (~45nF). I am
hoping to fix that this summer and get about 100nF.
I got 36 inches out of mine so far, so with some tuning you'll be
getting some great arcs!
What's your sparkgap design? I found that when using MOT stacks the
sparkgap is almost always the problem, and unless it has very good
quenching it won't work well at all. Simple fans don't seem to cut
it, unfortunately, I needed a shop-vac to get enough airflow to quench
I have no safety gaps on my coil (and that's why I no longer have
current limiting capacitors) so I don't know how they act.
On 6/25/05, Tesla list <tesla@xxxxxxxxxx> wrote:
> Original poster: Bob81818@xxxxxxx
> Hey list,
> Tonight was my 4.5" coil's first light. 4 stack mot, 80nf cap bank.
> I got about 14" thin purple streamers and a couple of blue ground arcs to a
> rod. I have a safety gap across the caps and it fired every couple of
> seconds, and every time I get a strong ground arc. Will that be cured when
> I tune it better? Also, if anyone would like to see the tesla-map printout
> I can email it to you, just email me at bob81818@xxxxxxxx I would be also
> interested in hearing from others with similar coil's. Thanks for your
> Dan E.