RE: Saturating LTR coil! - demonstrated!! - RE: ~Variac question

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Lau, Gary by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Gary.Lau-at-compaq-dot-com>

Hi Terry:

My ISP, AT&T, has announced that they lost the right to use the domain name
that my web site had been at.  Effective next month, it will have to change
to a new AT&T domain name.  I don't like being at their mercy and don't
ever want to have to change domain names again, so I've purchased my own
name and this should allow for a permanent URL for my web site.  The new
URL for Gary Lau's Tesla Coils is www.laushaus-dot-com/tesla.  There may be a
few "funnies" relating to links and page titles due to the URL forwarding
and cloaking, sorry...

Anyway, I can't tell if the NST is humming, the streamers were pretty loud.
 The basic stats were:
15/60 NST, 240uF PFC, .02uF Maxwell cap, single static "sucker" gap, 15A
Variac cranked to 140V (unloaded).
Regards, Gary

Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>

Hi Gary,

WOW!!!  This is that coil that always seem to perform better than it
"should".  It appears you have indeed got a true saturating LTR coil!!  The
current you measured is just right at what should be expected.

So your 15/60 NST is putting out maybe 3200 watts!!!! :-))))  Better yet,
it seems to survive!!  The current is about 3X so the temperature rise on
the windings is about 10X but it is intermittent operation at room
temperature so maybe no damage is being done.

I wonder what is limiting the current?  Maybe the shunts still work a
little or the rest of the system naturally limits itself??  Does the NST
hum real loud??  It may be the rest of the core is saturating as the "next"
current limiter.

If you could remind us of your web page and your coil's specs, we can check
it all out.  I was always wanting to try this type of coil but I was too
chicken of burning up my NSTs...

So the SLTR coil is "demonstrated" and a new type of Tesla coil is born!!

WOW!!  This is BIG!!!  Much much to ponder here!!

Cheers

	Terry

At 01:35 PM 2/16/2002 -0500, you wrote:
>Good guess!  I measured 184 mA RMS leaving the NST HV bushing, measured with 
>the fiber optic probe and RMS function of a Tek scope.  And this is with no 
>modifications to the NST shunts.  I have always run with the volume set to 
>"11", and have had no problems.  I have noted that the NST will get warm 
>after a couple minutes, actually re-melting a portion of the Vaseline jel 
>that it's potted in, but I've seen no permanent ill effects.
>
>Gary Lau
>MA, USA
>
>>Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>
>>
>>Hi Gary,
>>
>>Oh!!!  I wonder if the magnetic shunts are saturating?  They would almost
>>have to be.  I bet it is putting out a whole lot more than 60mA.  I would
>>guess about 150mA!!  That's cool if it does not blow up.
>>
>>I have wondered if a stable and safe coil could be made with a NST far into
>>saturation.  It looks like you have done it :-))  This is a very
>>significant thing!!!
>>
>>Cheers,
>>
>>	Terry
>
>
>At 08:59 AM 2/16/2002 -0500, you wrote:
>>That measurement actually was made with 240uF of PFC!
>>
>> -----Original Message-----
>>From: 	Tesla list [mailto:tesla-at-pupman-dot-com] 
>>Sent:	Friday, February 15, 2002 9:23 PM
>>To:	tesla-at-pupman-dot-com
>>Subject:	RE: ~Variac question
>>
>>Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>
>>
>>Hi Gary,
>>
>>Adding 200uf of PFC caps could probably cut that current draw in HALF!
>>
>>Cheers,
>>
>>	Terry