Re: NST toastmaster

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

Original poster: "jimmy hynes by way of Terry Fritz <teslalist-at-qwest-dot-net>" <chunkyboy86-at-yahoo-dot-com>


I think that the heating problem has nothing to do with the PFC capacitors. 
I think it is because the coil now had LTR instead of resonant sized 
capacitors. Maybe the shunts are saturating if you over-volt the NSTs. 
Anyway, the problem is solved, now that you have two transformers. Good 
luck with your coil!

Tesla list <tesla-at-pupman-dot-com> wrote:
Original poster: "WIZZARD . by way of Terry Fritz "

My power factor correction capacitors are connected in parallel the NST's
and after the variac.
My variac is only rated for 6 Amps, so I felt the cap's would help, and
they have.
I need to take some measurements.

I tried connecting the PF correction cap's before the variac and found that
it just wasted hydro when the coil wasn't even producing sparks. ( 7 Amps
at 120 Volt )

I'm a little leary of trying to get more out of an NST than it was designed
for.
Removing the shunts sounded like a great idea until I unpotted a dead NST.
WHAT A MESS!

Dr. Resonance has the right idea. He is making 16KV 200 mA transformers.
Economical, affordable ( I hope ) portable, and efficient.

Dwight, Ontario
Canada

 >From: "Tesla list"
 >To: tesla-at-pupman-dot-com
 >Subject: Re: NST toastmaster
 >Date: Fri, 20 Jun 2003 07:31:59 -0600
 >Original poster: "jimmy hynes by way of Terry Fritz "
 >
 >
 >
 >Are you placing the power factor correction caps in series? When they're
 >in parrallel, like they're supposed to be, the NST can't tell the
 >difference (except for a few extra volts because of the drop in the line
 >voltage). I was thinking about putting some PFC capacitors in series, to
 >resonate with the NST and cause shunt saturation, but I wont touch it
 >untill I finish my DRSSTC.
 >Tesla list wrote:
 >Original poster: "WIZZARD . by way of Terry Fritz "
 >
 >I think I found my problem. My Power factor correction cap's were of
 >sufficient value (150ufd) to run two 15KV/30mA NST's. I was down to one NST
 >when I was trying to over! come other problems.
 >I believe the leading power factor was to blame. I now have two NST's and
 >they will run for 5- 10 minutes before showing signs of getting warm.
 >I am excited about my new coil.
 >If I have time I will post some photos. :-)
 >
 >Dwight, Ontario
 >Canada
 >
 >
 > >From: "Tesla list"
 > >To: tesla-at-pupman-dot-com
 > >Subject: Re: NST toastmaster
 > >Date: Thu, 19 Jun 2003 18:34:52 -0600
 > >Original poster: "Jonathan Peakall by way of Terry Fritz
 > >"
 > >
 > >Dwight,
 > >
 > >I personally hav! e had good luck with all types of NSTs, even before the
 > >Fritz filter. I have run a 15kV 60mA NST for 20 min solid on a TC, and it
 > >was warm but ok. A few minutes run never seems to heat mine up at all. I am
 > >very careful about my safety gap settings and such.
 > >
 > >Just one data point.
 > >
 > >Jonathan
 > >
 > >www.madlabs.info
 > >
 > >----- Original Message -----
 > >From: "Tesla list"
 > >To:
 > >Sent: Thursday, June 19, 2003 7:09 AM
 > >Subject: NST toastmaster
 > >
 > >
 > > > Original poster: "WIZZARD . by way of Terry Fritz "
 > >
 > > >
 > > > Now that I have damaged a few NST's I am being quite cautious.
 > > > I have seen claims that a NST should last 50 years and other claims of
 > > > seven dead before switching to PT or Pig. BTW the Terry filter works
 > >great,
 > > > when it is cons! tructed properly:-)
 > > >
 > > > I can only run my coil for 5 minutes before the outside of the NST
 > becomes
 > > > uncomfortably warm.
 > > > 15Kv/30mA. Is there a recommended duty cycle for using these?
 > > >
 > > > ! Dwight, Ontario
 > > > Canada
 > > >
 > > >
 >
 >
 >
 >Jimmy



Jimmy