Re: new mmc

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

Original poster: "brian by way of Terry Fritz <twftesla-at-uswest-dot-net>" <ka1bbg1-at-mcttelecom-dot-com>

Well that makes sense. they are 40 kv and using 10kv on em,i did find a size
that gave some tuning, but you had to run for 3 or 4 minutes to get into
tune! tnx cul brian
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, March 19, 2001 7:24 PM
Subject: RE: new mmc


> Original poster: "Ray Robidoux by way of Terry Fritz
<twftesla-at-uswest-dot-net>" <robidoux-at-basystems-dot-com>
>
> Hi Brian and All,
>
> The trick I find with doorknobs (and all ceramic caps) is to derate
> them by about 4:1 (don't allow a 4000v cap to 'see' more than 1000v).
> Then there is no noticeable temp rise and just a little drift. It
> makes tuning at least possible. I don't recommend ceramic caps, but
> if they are derated by 4:1 they work somewhat OK.
>
> Ray
>
> > -----Original Message-----
> > From: Tesla list [mailto:tesla-at-pupman-dot-com]
> > Sent: Saturday, March 17, 2001 11:51 PM
> > To: tesla-at-pupman-dot-com
> > Subject: Re: new mmc
> >
> >
> > Original poster: "brian by way of Terry Fritz
> > <twftesla-at-uswest-dot-net>" <ka1bbg1-at-mcttelecom-dot-com>
> >
> > Hi, i was using doorknob type ceramic's left over from a laser
> > r+d job years
> > ago. the drift was huge. from 4100pf to 2100pf hot! made tuning
> > impossible.(also is one of the reasons the laser didnt fire correctly on
> > every pulse!) cul brian
> >
> > ----- Original Message -----
> > From: "Tesla list" <tesla-at-pupman-dot-com>
> > To: <tesla-at-pupman-dot-com>
> > Sent: Friday, March 16, 2001 6:57 PM
> > Subject: Re: new mmc
> >
> >
> > > Original poster: "Terry Fritz" <twftesla-at-uswest-dot-net>
> > >
> > > Hi Brain,
> > >
> > > Wow! your got it put together quick.  Your other note said you just
got
> > them a
> > > few hours ago :-))  Glad you like the caps.  MMCs are really
> > cool!  I was
> > just
> > > wondering what you were using for a primary cap before???
> > >
> > > Cheers,
> > >
> > >         Terry
> > >
> > >
> > > At 06:32 PM 3/16/2001 -0500, you wrote:
> > > >
> > > > Hi, i just put together a 12 cap string to try on my small coil.
> > Awesome!
> > > > Thanks for the caps "Terry". out of a OBIT i am getting 14 to 16
inch
> > spark
> > > > to ground but streamers are in the 20 to 24 inch range. obit
> > is 10kv at
> > 23
> > > > mils.
> > > > I also noted that tuning is fussy and adjustment is less than one
turn
> > now
> > > > and before there was really no sweet spot to be had! no heating of
the
> > caps
> > > > and no noticeable drift. Thanks cul brian
> > >
> > >
> > >
> > >
> > >
> >
> >
> >
>
>
>
>