[TCML] Newbie Grounding Question
Toxandale at SPP.ORG
Fri Dec 28 13:06:43 MST 2007
<But first I would try to get some field control on the sparks
Could you expand on this control and how it is affected?
From: tesla-bounces at pupman.com [mailto:tesla-bounces at pupman.com] On
Behalf Of bartb
Sent: Friday, December 28, 2007 11:23 AM
To: Tesla Coil Mailing List
Subject: Re: [TCML] Newbie Grounding Question
If a strike ring is used, it must go to RF ground only (never mains
Not all coils need them if their sparks just don't have the capability
of hitting down to the primary. And even when they do have enough power
to hit the primary, not everyone uses them. I think on average more
coilers do than do not. I haven't used them for several years now. I
guess it depends on the coil. If I had a coil that constantly had
primary hits, I would probably install something as a last resort. But
first I would try to get some field control on the sparks themselves.
Tim Meehan wrote:
> What about the ground ring? I am guessing that it is RF ground only.
> Do all coils need the ground ring - or only high power ones?
> On Dec 27, 2007 8:06 PM, bartb <bartb at classictesla.com> wrote:
>> Hi Ken,
>> Your right, this area of connection varies with the builders and
>> reasons. You'll no doubt get both connection concepts listed. There
>> two main reasons for the division in agreement. One is safety. The
>> is preventing common transients on mains ground. You'll have to
>> as it's an endless debate. Either will work of course.
>> I connect RF ground to the NST, NST filter, secondary. My NST is
>> under the coil. I don't even run a mains ground out to the coil. I
>> mains ground at the control panel only (anything I am in contact
>> This method helps prevent transients on main ground (which I am more
>> concerned with). However, I also use a braided line which powers the
>> NST. The braid itself connects to RF ground. I run quite a bit of
>> and can get strikes down to the floor quite often, so to prevent the
>> input from being hit, this braided shield helps to keep the strike
>> heading back to the house.
>> One thing important is to be sure RF ground is "always" connected. If
>> not, those transients "will" find a way back to the house. But if you
>> give them a nice low impedance path somewhere else, they'll take that
>> path instead. And that is the whole point of an RF ground connection
>> the NST. I do the same with all my transformers and for the same
>> No one can guarantee that devices in the house will always stay in
>> working order, but we can surely do our best to try to prevent known
>> Take care,
>> kkociolek8577 at wideopenwest.com wrote:
>>> Hi Everyone,
>>> I've been an EE for 25 years and always wanted to build a TC. I made
>>> arsed attempt in my younger days but it never got off the ground.
>>> digging through the archives and am a little bit confused about what
>>> connects and what does not connect to an RF ground. Some say that
>>> connection to an RF ground is the bottom of the secondary. Others
>>> the center tap and core of the nst, the spark gap housing, mid point
>>> filters, all on the high side of the nst should connect to RF
>>> say this is lethal. Maybe I'm misunderstanding all this info. Can
>>> set me straight? Thanks.
>>> WOW! Homepage (http://www.wowway.com)
>>> Tesla mailing list
>>> Tesla at www.pupman.com
>> Tesla mailing list
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