[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
RE: [TCML] a new coil being born + PICTURES
The capacitance is small and the primary inductor is large because
it's an ASRG that's going to fire the thing up to 480 times a second
or so. It's going to charge and discharge about 4 times during each
half-wave cycle.
I have another rotary gap platform that sits under the table that is a basic 1/4" propeller style 120 BPS gap. When I want to use that instead, I'll short out/remove one of the capacitors then adjust the tap inward.
I modeled this in Spice and JavaTC and physically with AutoCAD.
Next I've got to make the transformer box, filter, ballast and control panel.
--- On Mon, 7/28/08, toxandale@xxxxxxxxxxxxx <toxandale@xxxxxxxxxxxxx> wrote:
> From: toxandale@xxxxxxxxxxxxx <toxandale@xxxxxxxxxxxxx>
> Subject: RE: [TCML] a new coil being born + PICTURES
> To: "'Tesla Coil Mailing List'" <tesla@xxxxxxxxxx>
> Date: Monday, July 28, 2008, 11:45 PM
> Looks like nice workmanship Jeremy,
>
> I am curious about the capacitance though. Looking at
> everything you've done
> indicates to me that the performance you expect may require
> a lot more
> primary capacitance than you've allotted for (perhaps
> 20 to 30 nF?). I'm
> only going by the ballasting value you've described,
> and the size of the
> primary and secondary (and my own experience with a 6"
> coil running at 20
> amps). Have you checked this out on JAVATC?
>
> (un)Terry
>
> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx
> [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
> Of Jeremy Scott
> Sent: Monday, July 28, 2008 6:35 PM
> To: tesla@xxxxxxxxxx
> Subject: [TCML] a new coil being born + PICTURES
>
> Pictures of a new coil being born in my garage.
> I have some work to do yet but it's coming together
> nicely.
> I thought I'd share a few pics.
>
> Here's a full shot of the ASRG on it's oak
> platform. It swings eight 3/8"
> tungsten electrodes on a 10" path. The G10 disc is
> 3/4" thick and it's
> inertia at full speed is awesome, the whole platform wants
> to move.
> I have the regenerative controller ramp it up to full speed
> over
> about 15 seconds.
>
> http://mywebspace.wisc.edu/jeremyscott/web/ASRG.JPG
>
> Here's the 3/8" electrodes for the ASRG with clamp
> on retaining collars.
> (Set screw type won't bite tungsten.) I put rubber
> under the pillow
> blocks and the whole plaform to deaden some of the
> vibrations.
> This thing is scary at full speed.
>
> http://mywebspace.wisc.edu/jeremyscott/web/ASRG-gap.JPG
>
> The fearful Leeson 2HP Permanent Magnet DC motor (4800RPM).
> I run it at 90V:
>
> http://mywebspace.wisc.edu/jeremyscott/web/Leeson.JPG
>
> Here is a shot of my unfinished sliding core ballast. I
> found a bunch of
> zinc coated steel fender washers and laminated one side and
> stuck them all
> together. Not the best but they're magnetic so good
> deal. They fit perfectly
> inside of this 2" PVC pipe and slide easily. I will
> wind 10 inches of #10
> solid copper THHN wire about 6 or 7 turns for 30 or 50A.
> (In the background you can see one of the AutoCAD templates
> I used for
> laying out the primary supports.)
>
> http://mywebspace.wisc.edu/jeremyscott/web/BallastCore.JPG
>
> Here's some of the 50A 220V cables I'm going to
> use. TIP: Recreational
> vehicle (RV) stores are a great supply for 50A extention
> cables.
>
> http://mywebspace.wisc.edu/jeremyscott/web/BigWire.JPG
>
> Here's a shot of everything all put together, so far.
> That's all oak
> underneath. I hope to put some hinged doors or panels on
> this to
> completely enclose it and make it look like a nice piece of
>
> furniture. I also hope to deaden some of the sound and/or
> stop any
> tungsten 'bullets.' (Hence the fan under the spark
> gap.)
>
> http://mywebspace.wisc.edu/jeremyscott/web/MainTable.JPG
>
> Maxwell Caps. I've had these for awhile. 100KV @ 10nF.
> I can easily short out the last capacitor for 70KV @ 15nF:
> (I've got some geekgroup caps incase I destroy these.)
>
> http://mywebspace.wisc.edu/jeremyscott/web/MaxCaps.JPG
>
> The primary support comb. Supports 16 turns 1/4"
> copper pipe.
> These were designed in AutoCAD then printed to scale and
> glued to the plastic as a cutting guide. Worked very well.
> Big holes so I can hit most of the outer turns with the
> tap:
>
> http://mywebspace.wisc.edu/jeremyscott/web/PrimaryComb.JPG
>
> Another shot of the comb. These were fun to make. I will
> slide them into the supports and glue them. No metal here,
> the wooden supports are pegged and glued.
>
> http://mywebspace.wisc.edu/jeremyscott/web/PrimaryComb2.JPG
>
> My primary table. I went nuts with the router:
> http://mywebspace.wisc.edu/jeremyscott/web/PrimaryTable.JPG
>
> The PT and ballast caps from my old coil. Needs a good
> dusting:
> http://mywebspace.wisc.edu/jeremyscott/web/PT.JPG
>
> My 6.5" x 25" secondary and 7" duct for
> toroid:
> http://mywebspace.wisc.edu/jeremyscott/web/Secondary.JPG
>
>
>
>
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla
>
>
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla