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?functionCode=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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