Re: Grounding (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Fri, 10 Aug 2007 23:22:31 -0400
From: Crispy <crispy@xxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Grounding (fwd)

On an NST, should the center tap usually be grounded to the mains ground
or the RF ground?  Would the high frequency in the RF ground contribute
to damaging the NST?  If so, could the NST's center tap ground be
filtered before connecting to the main RF ground?

Thanks,
Chris

On Fri, 2007-08-10 at 11:18 -0600, Tesla list wrote:
> ---------- Forwarded message ----------
> Date: Fri, 10 Aug 2007 12:53:49 EDT
> From: Mddeming@xxxxxxx
> To: tesla@xxxxxxxxxx
> Subject: Re: Grounding (fwd)
> 
>  
> In a message dated 8/10/07 10:27:35 A.M. Eastern Daylight Time,  
> tesla@xxxxxxxxxx writes:
> 
> 
> ---------- Forwarded message ----------
> Date: Thu, 9 Aug 2007  21:23:33 -0700
> From: Anthony R. Mollner  <penny831@xxxxxxxxxxxxx>
> To: Tesla list  <tesla@xxxxxxxxxx>
> Subject: Grounding
> 
> I've heard a few things  about grounding and I was hoping to get some real
> insight on this. Ok, the  secondary deserves a really good ground connection
> but what about the power  supply and the tank circuit? Not to mention any
> other line or transformer  circuits that might be included? Should all
> grounds be independent? Should  they all be attached to the same ground rod?
> How about multiple grounding  connections like water pipes and ground rods?
> Should the ground connection  at the panel be used as well or separately from
> the rest of the circuit? My  experience has been that the more the better,
> tied together or  not.
> 
> Tony
> 
> 
> 
> Hi Tony, 
>  
> A common rule of thumb is to keep all the RF-carrying stuff grounded  in one 
> place and all the 50/60 Hz-only stuff grounded separately. My method is  to 
> ground everything from the control box back to the wall to the  (well-filtered) 
> AC mains ground and everything forward of the control box to the  separate RF 
> ground. If you Google the terms "ground loop" and "mains grounding  currents" 
> you should get 250,000+ hits. While most talk about hum in low voltage  audio 
> circuits, the same principle applies to the 10-20 KV in the Tesla primary  and 
> the 200+ KV secondary, where you'll get much more than a "tingle" from a  
> microphone, or a hum in your speakers. =:^O.
>  
> Matt D.
> 
> 
> 
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