Did you build those whimursts from plans? They are very nice!
Sent from my Samsung GALAXY S5™, a Cricket 4G LTE smartphone
-------- Original message --------
From: Doug <doug11642@xxxxxxxxxxx>
Date:03/26/2015 15:48 (GMT-06:00)
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Cc:
Subject: Re: [TCML] New to the site
Here is my next question; The plans I am following for my first TC are
quite detailed and easy to follow, but I see a few things that I think
could be better, such as not routing the secondary wires inside the coil
form. SO given that the transformer is a neon 60 hz-6000 v-30 ma, and
the Cap is a 0.01 mfd - 10,000 vac , and it will be a spark gap TC, and
an 8" toroid What would be the optimum primary and secondary coil confg.
I know there must be a formula for this, but that would just confuse me,
math is not my long suit.
I just want to build this the best that it can be as I do my other
projects, go here ( https://www.youtube.com/user/dr043042#p/u) to see
some of them.
Thank you very much for any advice, Doug Johnson
On 3/25/2015 8:39 PM, Jim Lux wrote:
> On 3/25/15 7:52 AM, Timothy Gilmore wrote:
>> The secondary bottom will go to electrical house ground.
>
> Uhh.. not necessarily. Yes, it should eventually connect to
> electrical safety ground (aka green wire or third prong ground), but
> you do not want to use that as your only RF ground.
>
> Even a small coil (especially a small coil, which will have a higher
> operating frequency) should have a counterpoise or good ground *plane*
> under it.
>
>
>
> If a larger sized
>> coil is made - it will go to both electrical ground and RF ground (made
>> with a 4-8 copper pipe in the earth or large sections of Hardware
>> cloth/Chicken wire directly placed under the tesla coil - ensuring its
>> considerably larger than the top load).
>
> I'm not a big fan of ground rods. They're not a particularly good
> connection to "ground".
>
>
> I am a fan of a screen counterpoise. Hardware cloth, chicken wire,
> aviary netting, reinforcing mesh, sheets of aluminum foil, etc.
> Radius of counterpoise should be comparable to the height of the
> topload above the mesh.
>
> So if you have a table top coil that's 2'-3' tall, you'd have
> something like a 4 foot diameter or square conductive plane under the
> coil on the table top.
>
> If you have a 5 foot secondary on top of a 3 foot high equipment
> cabinet with your rotary gap, etc., so the topload is 8-9 feet high,
> then you want a 20 foot diameter counterpoise.
>
>
> another alternative is a fence or cage around the coil, connected to
> the bottom of the secondary.
>
>>
>> The secondary top "should" go to a top load of either a sphere for
>> smaller
>> distributed multiple sparks or to a donut shaped toroid which
>> provides some
>> additional minimal capacitance and will allow build up of sparks to be
>> longer in length.
>>
>> Tim
>>
>> On Wed, Mar 25, 2015 at 8:01 AM, Doug <doug11642@xxxxxxxxxxx> wrote:
>>
>>> Gentlemen; I am building my first Tesla Coin rated at around 250.000
>>> volts
>>> and would like some advice on routing and connecting the secondary coil
>>> wires top and bottom.
>>> Thank you for any help you can provide.
>>> Doug Johnson
>>> _______________________________________________
>>> Tesla mailing list
>>> Tesla@xxxxxxxxxx
>>> http://www.pupman.com/mailman/listinfo/tesla
>>>
>> _______________________________________________
>> Tesla mailing list
>> Tesla@xxxxxxxxxx
>> http://www.pupman.com/mailman/listinfo/tesla
>>
>
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