[TCML] Newbie Grounding Question
jimlux at earthlink.net
Thu Dec 27 12:34:26 MST 2007
>From: kkociolek8577 at wideopenwest.com
>Sent: Dec 27, 2007 8:31 AM
>To: tesla at pupman.com
>Subject: [TCML] Newbie Grounding Question
>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.
The only true RF ground is the bottom of the secondary. Connect it to your ground screen, counterpoise, or stake in the ground, or whathaveyou.
The electrical safety ground (green wire) should connect to the case of the NST.
Now, you may want to interconnect the electrical safety ground and the RF ground. If there is a line frequency primary to RF ground short, perhaps via a spark), it would ensure that your RF ground doesn't rise to the HV potential (important if you have one hand on the counterpoise and one foot on the floor)
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