Hi Tim
Now would be the time to play around with any of the tesla design programs
out there. Run the numbers first.
Dave
> -----Original Message-----
> From: Tesla [mailto:tesla-bounces@xxxxxxxxxx] On Behalf Of Tim Gilmore
> Sent: Sunday, February 22, 2015 15:30
> To: Tesla Coil Mailing List
> Subject: Re: [TCML] Dual identical FRANCE neon sign
> transformers (15000v60mAeach) in parallel
>
> Dave,
>
> We do have a Granger and a Menards (like Home Depot) but a
> bit further away. For now I'd like to know if the 2 foot
> length (6 inch diameter) is worth using or try to find
> something at Grangers in 6" a bit longer. Or go with the 2
> foot (4 inch diameter) one?
>
> Thanks, Tim
>
> > On Feb 22, 2015, at 4:27 PM, Dave Halliday
> <dh@xxxxxxxxxxxxxx> wrote:
> >
> > If your neighborhood is large enough to support both a
> Lowe's and HD, it
> > should be large enough to have a commercial plumbing company.
> >
> > Go to them and see if they could sell you a length of 8"
> PVC tube. Explain
> > what you are doing and if they are interested enough, they
> might give it to
> > you.
> >
> > Be prepared to pay though - Grainger's has a 10' length of
> 8" schedule 40
> > (thin wall) for $138.60
> >
> >
> http://www.grainger.com/product/HARVEL-Pipe-22FR49?functionCod
e=P2IDP2PCP
> >
> >
> >> -----Original Message-----
> >> From: Tesla [mailto:tesla-bounces@xxxxxxxxxx] On Behalf Of
> Tim Gilmore
> >> Sent: Sunday, February 22, 2015 11:45
> >> To: Futuret; Tesla Coil Mailing List
> >> Subject: Re: [TCML] Dual identical FRANCE neon sign
> >> transformers (15000v60mA each) in parallel
> >>
> >> I went to Lowes and found a greenish 6" pvc? Tube BUT it's
> >> only 24" and the only 6" pipe they carry. Also went to Home
> >> Depot and bought a 4" standard pvc whitish tube but only 24".
> >> They do carry longer 4" pipe but it would need to be cut from
> >> a 5' length.
> >>
> >> Since I'm using 2 15000v 60mA NST I'm thinking I will need to
> >> use the 6" pipe but for 1200 turns Ill need 26 gauge for 22"
> >> but leaves me with a 3.5:1 ratio. Is this good enough not
> >> being at 4:1 or 5:1 ratios - or is it better to just use the
> >> more common 4" pipe (2' or buy a taller one) with the 2 NSTs?
> >>
> >> Thanks, Tim
> >>
> >>>> On Feb 21, 2015, at 3:22 PM, Futuret via Tesla
> >>> <tesla@xxxxxxxxxx> wrote:
> >>>
> >>>
> >>> Tim,
> >>>
> >>> The secondary does not need to be as tall as the spark is
> >> long. For example
> >>> my TT-42 coil has an 18" tall secondary and gives 42"
> >> sparks. However sparks
> >>> are more likely to arc down from the toroid and strike the
> >> primary if the secondary
> >>> is too short. I often place a smaller toroid below the
> >> main toroid to raise up
> >>> the main toroid some to keep sparks away from the primary.
> >> The length
> >>> of the sparks has a lot to do with the current in the arc
> >> and the growth
> >>> of sparks over successive gap firings. It seems to me that
> >
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