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RE: [TCML] Big Insulators
I attached a 2"x6" with rounded ends on top of my coil base. The secondary fits snugly on top of that. The pics are old, and before I raised the second topload as high as I could and have it still clear my 8' garage doors. I used AWG 18 and simply had two loose (unpolyurethaned to the form) wraps which end where my primary begins, below the base. I soldered the AWG 18 to the 3/8" copper tubing. As I raised and lowered my primary, I simply rotated the secondary to tighten the AWG 18.
I have one 1" thick PVC baffle, unglued in the interior, with a 6' nylon threaded rod, which acts as a weight to hold the toploads down. On top, I have a 1" PVC plug with a hole that's just big enough for the nylon threaded rod to slide in and out of.
For RF ground, I have a standard copper coated ground rod, which I attached a male welding quick connect to.
Adam
--- On Mon, 11/23/09, Jim Mora <wavetuner@xxxxxxxxx> wrote:
> From: Jim Mora <wavetuner@xxxxxxxxx>
> Subject: RE: [TCML] Big Insulators
> To: "'Tesla Coil Mailing List'" <tesla@xxxxxxxxxx>
> Date: Monday, November 23, 2009, 8:02 PM
>
> Hi Adam,
> Nice coil!
>
> That's very inline with what I want to do. How do you make
> the ground
> connection to the secondary base? I should have about a
> foot of extra
> coil-form.
> I want a robust RF ground that connects easy. I am thinking
> of baffles in
> the coil at the primary level as I write this. That would
> allow simple bolt
> on flat cable at the coil base.
>
> Other ideas? My 8" uses the Richard Quick method - a bit of
> a pain how I set
> it up.
>
> Thanks,
> Jim Mora
>
> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx
> [mailto:tesla-bounces@xxxxxxxxxx]
> On Behalf
> Of Yurtle Turtle
> Sent: Sunday, November 22, 2009 5:49 PM
> To: Tesla Coil Mailing List
> Subject: Re: [TCML] Big Insulators
>
> Here's the way I mounted my 10" secondary:
>
> http://www.classictesla.com/hot-streamer/adam/bigass_coil/coil09.jpg
>
> I raised and lowered my primary until I was happy, then
> replaced the 2x4s
> with 3" PVC.
>
> Adam
>
> --- On Sun, 11/22/09, Jim Mora <wavetuner@xxxxxxxxx>
> wrote:
>
> > From: Jim Mora <wavetuner@xxxxxxxxx>
> > Subject: [TCML] Big Insulators
> > To: "'Tesla Coil Mailing List'" <tesla@xxxxxxxxxx>
> > Date: Sunday, November 22, 2009, 4:18 PM
> > Hello All,
> >
> >
> >
> > A hearty thanks goes out to John Forcina for providing
> me
> > with some truly
> > awesome insulators. The top cap is just shy of 4" in
> > diameter so a sewer
> > pipe will be cut and glued to the inside of an end
> cap
> > which will be lag
> > bolted into my round, Formica school table top. Four
> will
> > make perfect HV
> > legs by simply setting down the table top on them! -
> > Pictures to follow. I
> > want this 12" to be easy to set up, tear down.
> >
> >
> >
> > I haven't figured out how to mount the secondary yet;
> but,
> > I was thinking,
> > since I have extra length of the .125" wall PVC
> former
> > (=Light + 20lbs of
> > #18 magnet wire) of extending the secondary through a
> hole
> > in the table top
> > for stability and coupling adjustments. The top load
> should
> > be light as it
> > is 12" dryer duct ~ 52" round. The coil will be a 5:1
> ratio
> > with .375 copper
> > tubing as the primary, an ASRG, and a .1uf General
> Atomics
> > new, high rep
> > rate cap.
> >
> >
> >
> > The control cabinet tames a 14400v dry transformer in
> a
> > separate transformer
> > cabinet.
> >
> >
> >
> > Any ideas on the secondary mounting would be welcome!
> I
> > have yet to find a
> > way that I like with my smaller coils without fussing
> > around; and, I want to
> > know what I am going to do before I cut the former.
> >
> >
> >
> > Thanks John - perfect legs!
> >
> > Jim Mora
> >
> > This hobby keeps me $ broke;-^)
> >
> > _______________________________________________
> > Tesla mailing list
> > Tesla@xxxxxxxxxx
> > http://www.pupman.com/mailman/listinfo/tesla
> >
>
>
>
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