Hi Ken,Your right, this area of connection varies with the builders and their reasons. You'll no doubt get both connection concepts listed. There are two main reasons for the division in agreement. One is safety. The other is preventing common transients on mains ground. You'll have to choose as it's an endless debate. Either will work of course.
I connect RF ground to the NST, NST filter, secondary. My NST is placed under the coil. I don't even run a mains ground out to the coil. I keep mains ground at the control panel only (anything I am in contact with). 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 power and can get strikes down to the floor quite often, so to prevent the AC input from being hit, this braided shield helps to keep the strike from 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 to the NST. I do the same with all my transformers and for the same reason.
No one can guarantee that devices in the house will always stay in good working order, but we can surely do our best to try to prevent known issues.
Take care, Bart kkociolek8577@xxxxxxxxxxxxxxxx wrote:
Hi Everyone, I've been an EE for 25 years and always wanted to build a TC. I made a half-arsed attempt in my younger days but it never got off the ground. I've been 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 the only connection to an RF ground is the bottom of the secondary. Others state that the center tap and core of the nst, the spark gap housing, mid point of filters, all on the high side of the nst should connect to RF ground. Others say this is lethal. Maybe I'm misunderstanding all this info. Can someone set me straight? Thanks.Ken -- WOW! Homepage (http://www.wowway.com) _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla
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