# Re: [TCML] breakouts and a picture

```Hi Bart

```
The primary is flat so it is just the height of the copper tube which is 10mm so 1cm. If I have completely misunderstood that part please let me know and I will run it all again.
```
Thanks

Simon

On 12 Aug 2009, at 03:32, bartb wrote:

```
```Simon,

```
Primary is screwed up. Can't be heights of 1. What's the real height, 45?
```
Bart

Simon Dodd wrote:
```
Here is the output from JAVATC, the only thing that might not be quite right is the spark gap. I might well remake it soon though to get the gap smaller.
```

Simon

Secondary Coil Inputs:
45 = Height 1
110 = Height 2
1300 = Turns
0.05 = Wire Diameter
```
---------------------------------------------------- Primary Coil Inputs: ----------------------------------------------------
```15 = Radius 1
1 = Height 1
1 = Height 2
11 = Turns
1 = Wire Diameter
0.02 = Primary Cap (uF)
```
```Toroid #1: minor=13, major=41, height=120, topload
```
-------- Transformer Inputs: ----------------------------------------------------
```240 [volts] = Transformer Rated Input Voltage
8500 [volts] = Transformer Rated Output Voltage
50 [mA] = Transformer Rated Output Current
50 [Hz] = Mains Frequency
240 [volts] = Transformer Applied Voltage
0 [amps] = Transformer Ballast Current
0 [ohms] = Measured Primary Resistance
0 [ohms] = Measured Secondary Resistance
```
---------------------------------------------------- Static Spark Gap Outputs: ----------------------------------------------------
```0.031 [cm] = Gap Spacing Between Each Electrode
12021 [peak volts] = Charging Voltage
8388 [peak volts] = Arc Voltage
39436 [volts] = Voltage Gradient at Electrode
33552 [volts/cm] = Arc Voltage per unit
69.8 [%] = Percent Cp Charged When Gap Fires
4.826 [ms] = Time To Arc Voltage
207 [BPS] = Breaks Per Second
0.7 [joules] = Effective Cap Energy
263476 [peak volts] = Terminal Voltage
146 [power] = Energy Across Gap
78.2 [cm] = Static Gap Spark Length (using energy equation)

On 7 Aug 2009, at 01:30, bartb wrote:

```
```Simon,

```
If you do as Phil suggested, delete out all the unnecessary stuff to keep the data compact (really, just inputs are needed).
```
Bart

Phil Tuck (hvtesla) wrote:
```
```Simon.
```
If you used JAVATC the best option would be to run JAVATC and then use the 'Format Design as text' button. Then cut and paste the results into your email. That way the more learned members (I'm most certainly not one) can
```advise you better.

Phil

-----Original Message-----
```
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
```Of Simon Dodd
Sent: 06 August 2009 03:26
To: Tesla Coil Mailing List
Subject: Re: [TCML] breakouts and a picture

```
OK, here goes, In the video I didn't do any tuning but the second firing was at a festival and I did a bit of tuning which improved the spark length but still no breakouts. I am using a 4" PVC tube with copper tube inside, the same as a lot of designs I have seen. I used JAVATC to get my dimensions and my capacitor is an MMC type.
```
```
I noticed when I was tuning and getting small improvements The shock to my arm was increasing more than expected so I stopped using a non grounded rod very quickly!!
```
The picture is now at www.djodd.co.uk/tesla

Thanks

Simon
On 6 Aug 2009, at 00:40, Lau, Gary wrote:

```
```Hi Simon,

```
The TCML does not permit attachments, so we didn't see the picture.
```
```
The first question that must be answered in troubleshooting a coil is, is the primary in tune with the secondary? In your video, I didn't hear any mention of tuning. Have you tried tapping the primary differently and determined if it improves or degrades performance? Did you use some type of design software to choose the components?
```
```
And there's any number of other issues that we can't deduce from your video. Details of the spark gap, and capacitor type.
```
```
When you do get your coil running well, you probably shouldn't try holding the metal rod in your hand and drawing sparks to it, unless the rod is securely wired to a good ground. You don't want that current flowing through your body!
```
Regards, Gary Lau
MA, USA

```
```-----Original Message-----
```
From: tesla-bounces@xxxxxxxxxx [mailto:tesla- bounces@xxxxxxxxxx] On
```Behalf Of Simon Dodd
Sent: Wednesday, August 05, 2009 5:04 AM
To: Tesla Coil Mailing List
Subject: [TCML] breakouts and a picture

Hi Guys,

Here is a picture of the second firing of my coil, I was getting
```
streamers to a grounded point about 10-15cm away. However I would like to get streamers leaving the torroid to the air rather than a grounded point. Is this just a question of tuning or would a change in
```torroid make a difference?

The coil is a SGTC with an 8.5Kv 50mA NST. The secondary is about
23" (I have the exact measurement written down somewhere!)

```
You get an idea of the design from this photo and I also posted the video of the first firing a while ago but here is the link again, it
```has more closeups of the coil.

Simon

```
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