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Re: [TCML] Newbe's First Coil
Hi
Smaller secondary.
Tapable flat primary with bare copper turns on plastic supports.
Edgeless topload.
Better primary cap (no ceramic, sorry)
Multiple spark gap with hollow copper electrodes
The 10 kV @ 23 mA can do more.
Here, some construction ideas from a 9.5 kV@23 mA small TC:
http://www.sciencezero.org/vasil/romtcb/dalu364tc.html
Happy coiling
teslina
>
>
--- On Sun, 1/31/10, cbroring@xxxxxxx <cbroring@xxxxxxx> wrote:
> From: cbroring@xxxxxxx <cbroring@xxxxxxx>
> Subject: [TCML] Newbe's First Coil
> To: tesla@xxxxxxxxxx
> Date: Sunday, January 31, 2010, 8:21 PM
> Hello to the members of this
> list. For no particular reason I built a
> Tesla Coil this winter. Just got it running, more or
> less. So (hopefully) here are a couple of photo's of
> what I put together.
>
> http://img651.imageshack.us/img651/5567/1000420.jpg
> http://img683.imageshack.us/img683/5931/1000424e.jpg
> http://img651.imageshack.us/img651/5043/1000425.jpg
> http://img651.imageshack.us/img651/5164/1000427.jpg
>
> The transformer is a 10kv 23mA oil burner trans.
> Primary is about 12 turns # 14 sold house wire 10" diameter
> with a couple extra taps available. Secondary is 1300
> turns #27 on 3.5 inch pvc. Spark gap is 2 nails spaced
> about 5/16" Capacitor is two 6000pF
> 30kv hokey puck ceramics, and one shows a slight temperature
> rise with use. Top load is a cookie tin and bent pizza
> pan. The ground is the house wiring tied in to an
> extensive ham radio/ lightening ground system.
>
> It really doesn't work that great. I removed a coupe
> turns and moved the tap around to get the best coupling I
> could. I get a ring of 2 inch sparks of the pizza
> plate. I put a screwdriver on top and get 3-4 inch
> sparks off that. I haven't tried bringing a grounded
> probe to the top load yet. Anyway, I read that the
> ceramic capacitors are not really durable and one of mine
> shows some heating after a minuet or so of on time to. I
> think I need to work on that next. I expected a little
> more out of it even with the 250 watt power transformer.
>
> I need to figure out how to ground the thing. I need
> a better capacitor. I have lots of big transformers and DC
> power supplies to play with once I get the coil working a
> bit better.
>
> Any suggestions are much appreciated.
>
> Charlie
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>
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