Re: grounding

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Matt T." <p2sarethebomb@xxxxxxxxxxx>


I do not have the Green Safety grounded to my NST for the reasons you 
stated.  The NST is out of reach so no concerns there.  I 
disconnected the RF ground as suggested and shortened my grounding 
strap and my coil runs up great!  I just need to tune it in a bit 
better and i should be fine.  Thank you for all the great advice.


From:  "Tesla list" <tesla@xxxxxxxxxx>
To:  tesla@xxxxxxxxxx
Subject:  Re: grounding
Date:  Mon, 12 Feb 2007 21:55:31 -0700
>Original poster: "Barton B. Anderson" <bartb@xxxxxxxxxxxxxxxx>
>
>Hi Matt,
>
>Do you have the NST and Green Safety ground from the mains tied
>together at the NST? If, so, I would recommend removing the green
>safety ground (as long as the NST is safely isolated out of reach).
>If it's in a place where the case can be accidentally touched with
>the coil running, then keep the safety ground at the NST and remove
>the RF ground to the NST. The idea there is to simply keep the RF
>transients out of the safety ground circuit, but only if it is safe
>to do so.
>
>Sometimes it is necessary to retune after an RF hookup, especially
>on small coils.
>
>I've noticed no performance difference, but I've ran without an RF
>ground only a few times. Some have mentioned noticing a  significant
>difference, but I wonder if retuning of L and k were involved or if
>the assumption was a knee-jerk reaction (maybe not).
>
>Take care,
>Bart
>
>
>
>Tesla list wrote:
>
>>Original poster: "Matt T." <p2sarethebomb@xxxxxxxxxxx>
>>
>>
>>I am new to coiling and just recently finished my first coil and
>>have run it successfully but have run into a few problems.
>>
>>I am working on installing a RF ground, but ran my coil the first
>>few times with no RF ground, just a ground strap left floating.  It
>>performed well producing 23 inch streamers( my coil is powered by a
>>15 kv 30 ma NST).  Just last night i connected to the RF ground and
>>went to power up.  Every time I ran up my variac to only a few
>>volts, my safety breaker poped.  I disconnected from RF ground and
>>the coil performed as before.  My RF ground is completely separate
>>from the house ground so i don't understand what is happening.  My
>>one concern is that i have the center tap of my NST connected to RF
>>ground, but everything i have read says that is how it should be.
>>I don't mind running it unconnected, but am concerned with safety.
>>I am also wondering if my performance would be increased with it
>>grounded.  I appreciate your time and any comments.
>>
>>-Matt
>>
>>
>>
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>
>
>
>



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