RE: [TCML] Control Cabinet, X-ray cable, RF-Mains grounding

["Jim Mora" <wavetuner@xxxxxxxxx>]

Hi Bart, et al,

Actually, the disconnection could be made pretty easy in the control cabinet
with stripped back shield. This would be way better than becoming lion's
food. I still have the issue of RF ground verses Mains ground. Do you run a
significant distance to your pig with your RF ground feeder and how hearty
is it or is the pig nearer the coil and at distance to mains ground?

This disallows the PT being in the control cabinet unless I can run a long
RF connection to the PT. Furthermore, the PT core will be at mains ground if
the PT is kept in the desired cabinet and the RF ground would need to be
highly insulted where it enters the cabinet. Therein lies my problem to stay
self contained. Any ideas?

Jim Mora

-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of bartb
Sent: Tuesday, December 16, 2008 7:29 PM
To: Tesla Coil Mailing List
Subject: Re: [TCML] Control Cabinet, X-ray cable, RF-Mains grounding

Something else I decided (what the hell) to comment on (my personal view 
if the subject):

The hv cable being stripped back from the gap connection is either going 
to RF or mains ground in the norm of what I've read. In either case, 
there will be tendency for the terminal sparks (if capable of ground 
arcs) to seek out the cable mesh. It's an bad invitation. I've never 
understood why anyone would configure their high power coil with this 
setup. If the cable is braided, then just strip both ends back and get 
rid of the potential by at least a few thousand volts. Both RF and mains 
ground if in reach is like a crippled bison to Lions. Six years ago, I 
was against strike rings (for the same reason). Even though were in the 
lions territory, we can still hide our scent.

Bart

bartb wrote:
> Hi Jim,
>
> Jim Mora wrote:
>> I know that the spark gap ends need to be stripped back to the PE for 
>> 12 to
>> 18". I am on the fence how to best and safely make this connection. Dr.
>> Resonance suggests grounding one side of the PT and using his RL 
>> filter and
>> thusly one HV feed. The perceived downside of this is that RF and mains
>> grounds are tied together albeit through the air core and resistor bank.
> I ground one ear of my pig to RF ground as well as the case, thus, a 
> single hv feed to the coil. Mains ground stops at the control cabinet. 
> In this configuration, there's no connection to RF and mains ground 
> (filter or not).
>
> Bart
> _______________________________________________
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>
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