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Re: TAA DAAA!
> Date: Sun, 2 Feb 1997 18:25:32 -0700
> From: Tesla List <tesla-at-poodle.pupman-dot-com>
> To: Tesla-list-subscribers-at-poodle.pupman-dot-com
> Subject: TAA DAAA!
> Reply-to: tesla-at-pupman-dot-com
> Subscriber: knardell-at-mailhost.accesscom-dot-net Sun Feb 2 17:27:06 1997
> Date: Sun, 02 Feb 1997 00:50:54 -0600
> From: Kevin Nardelle <knardell-at-mailhost.accesscom-dot-net>
> To: mhammer-at-misslink-dot-net
> Cc: tesla-at-pupman-dot-com
> Subject: TAA DAAA!
>
> Well I have finally built some monster gaps, that has put the cherry
> on the cake! My sparks are OUT TO MAX FOUR FEET and normaly push to three
> feet! They like to look for grounds now and also I want to mention that I
> have made several other changes so here is my coil now. (This is it's max
> performance I think)
>
>
> Secondary;
> 3" PVC Drain pipe total length is 27 inches, winding is 23 inches -at- 851 turns.
> #22 magnet wire treated with many coats of varnish.
> Terminal is a 15 inch toroid
> ground on secondary form is a 1 inch X 1/2 inch copper plate soldered to the
> last bottom turn.
> RF ground is two 8 foot ground rods and a chain link fence:)
> (QUESTION; Could that be my bad RFI problem?)
> Primary;
> 1/4 inch copper tube with 15 turns spaced 1/4 apart, 6 inch diameter at the
> center.
> Gaps;
> two series gaps on each leg going to the primary coil. they are made up of
> eight 1 inch dia. X 6 inch long copper pipes mounted on a 1/2 inch chunk of
> lexan spaced 1/16th inch. The other gap is four pieces of 1/4 copper tube
> done the same as the previous gaps but are only 2 1/2 inches long.
> Capacitor;
> salt water caps made from 9 ice tea bottles, the value at this time is
> unknown as I have not checked since adding more caps.(BTW 7 bottles was .006uF)
> Neon;
> 12KV 120MA 120VAC powered with a variac and filtered with two 2200pF caps
> and two 0.047uF caps, also a 12mH choke wired to filter out rf feeding back
> into the AC line.
> Wire;
> All wire used is soft flexible neon HV wire.
> Oh, I also use a safety gap and it is spaced at 1 1/2 inch and fires only
> once in a while, the gap also has no ground in the center.
>
>
> Here is my problem, before I fixed the coil the LAST TIME (tonight) I was
> not getting ANY RFI on my computer or TV or telephone but my neighbor above
> me(I live in a double) pounded on my door telling me I was killing his
> computer and TV. I showed him I was not getting any and I mean ANY RFI on
> anything but he said I was killing his TV, how could this be possible?
> Now as I have the coil kicking butt and doing better than ever I again am
> back to square one with bad RFI trouble.( Now I have the visible white lines
> on my TV) I only have left to build the best monster filters even put on a
> tesla coil so could someone use my coil specs and tell me how to go about
> building these serious monster RFI eatting filters?
>
> Thanks in advance.
>
>
> Regards,
> Kevin Nardelle
>
> ********************************************
> * T E S L A C O I L S *
> ********************************************
> Kevin Nardelle knardell-at-accesscom-dot-net
> My main web page IS UP all TESLA
> related with lotsa pictures and links.
> http://www.icorp-dot-net/users/kev/tesla
> http://www.accesscom-dot-net/nardell
> Non related sites I have
> The Louisiana Swamps Online (Under construction)
> http://www.icorp-dot-net/users/kev
> **********************************************
Kevin,
Congratulations on your leap in performance. I can really appreciate
the excitement you feel having made a performance jump/accomplishment
like this. I don't think you are going to be able to keep RFI out of
immediate neighbour's apartments from a TC running at 1800 watt power
levels unless you spend megabucks or megatime enclosing your own
apartment with what amounts to a chicken wire mesh bag with
absolutely no holes, and expensive (affordable through surplus) RFI
line filters to bring the outside world power mains into this 'bag'. Any opening
in this 'bag', like personnel access to get in and out would
require an EMI tight gasketed, spring stock door seal, expensive!
If you are *REALLY* bent now to coil, it might be cheaper to move out
to a country property, then you can coil big! : )
Sounds like if you are bothering TV, VHF or UHF off-air channels then
you have high-frequency parasitic (birdies) occuring in your tank
circuit interconnection wiring. These can be really hard to get rid
of. A treatise on this subject is far beyond a simple post here.
It might be possible to supress such emissions with proper
application of lead dress, ground planes and possibly wideband high frequency
suppression damper chokes (a few turns of heavy wire around a low
resistance non-inductive resistor) in series with your tank circuit
in the right places, but I myself have not yet forayed into the peak pulse power
arena represented by discruptive T.C.'s with such suppression technology
to give you useful construction tips on building and applying such suppression
devices. I took the easier way out. I moved out into the country!
If it makes you feel better, I was notified the day following the
exciting and successful only test of my largest 54 kHz coil system
from the immediate next building neighbour that I had obliterated his off-air
reception on UHF channel 28! He said all other VHF and UHF channels were
fine. What have I done to fix this? I've moved away from him to an area
where there is no channel 28. : ) In actuality, I have yet to plug
my large system in for a second test and have not yet had any chance
to address this parasitic emission problem observed during the first power
up. As the system will be re-configured physically in a major way
the old experience will not likely apply anyhow. I do however look
forward to the next upcoming test, for ALL that it has to show. The
part about moving, that was true.
Try operating your coil during odd wee hours when your neighbours are
unlikely to be watching television, or invite them over to watch
every coil firing.
rwstephens