Fw: MMC problems

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

Original poster: "John Richardson" <jprich-at-up-dot-net> 

Hi Terry and those who have helped me,

I finally got my meters in place, and can give some more info into what my
coil is drawing.  Again, these are short runs, as I can't run things outside
yet.  For anyone who may not remember, I had the caps blowing on my
12000/120 system, and excessive primary heating.  I hope to run for an
extended period in the next day or so, weather permitting, but for now all I
can say that at exactly 119 volts in, with no PFC, I am pulling well in
excess of 15 amps from the wall.  I can't be any more accurate than that, as
15 amps is the max this meter will measure, and the needle is beyond pegged.
With 300uF PFC, I am pulling between 12-13 amps from the wall.  This sounds
right to me, but maybe others can shed more light.  I really expected the
trans to be pulling more, thinking that this may explain why caps have been
popping and things heating (ie trans outputs more than expected).  Will have
more info soon.

Thanks,
John Richardson

----- Original Message -----
From: "John Richardson" <jprich-at-up-dot-net>
To: "Terry Fritz" <teslalist-at-twfpowerelectronics-dot-com>
Sent: Saturday, March 20, 2004 7:37 AM
Subject: Re: MMC problems


 > Hi Terry,
 >
 > I need to do two things before I can proceed any further.  I am still
 > waiting for my meters from All-Electronics, as I want to see exactly what
 > this thing is drawing.  I think I might be surprised.  I also encountered
 > some safety issues in the basement, as the coil was hitting an unexpected
 > five feet with just the addition of a roll of dryer tubing placed on the
 > existing toroid, and a little re-tuning.  I had everything at what I
thought
 > was a safe distance from the lone wire running the edge of the basement
 > foundation, and a huge spark managed to find it within fifteen seconds.
 > When it did that, it blew (literally) the outlet for the fridge out of the
 > wall on the floor above.  I can't have that.  I am going to use a friend's
 > garage for further tests, or build one heck of a Faraday cage.  I
personally
 > think that this NST is putting out more than it should, and the
combination
 > of low primary inductance (tapped at 6.5 turns) because of the smallish
 > secondary and toploads is causing the heating issues.  I will know more
when
 > I get my meters in place.
 >
 > Thanks for your continued interest, and I will keep you posted ASAP.
 >
 > Thanks,
 > John Richardson
 > ----- Original Message -----
 > From: "Terry Fritz" <teslalist-at-twfpowerelectronics-dot-com>
 > To: "John Richardson" <jprich-at-up-dot-net>
 > Sent: Friday, March 19, 2004 9:00 PM
 > Subject: MMC problems
 >
 >
 > > Hi John,
 > >
 > > Did you ever get your MMC problem fixed?  If so, I will get your tape
back
 > > to you and all.  If not, let me know and we'll try to figure it out
 > further.
 > >
 > > Cheers,
 > >
 > > Terry
 > >
 >