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Re: Problems with SRSG on TC
Original poster: "Barton B. Anderson by way of Terry Fritz <teslalist-at-qwest-dot-net>" <classictesla-at-netzero-dot-com>
How wide is the RSG gap (stationary to rotating)? If it's too wide, your
cap may be firing at too high a voltage and somewhat randomly along the RSG
path. If a firing is missed, the cap "may" continue to charge to a higher
voltage if the transformer is capable. This relates to the RSG firing
intermittently (not at the 240 BPS you may assume it is) and often leads to
the safety gap firing intermittently. BTW, at 240 BPS, phase off-peak about
23 degrees. (where voltage and current curves cross).
Tesla list wrote:
>Original poster: "Zagarus Rashkae by way of Terry Fritz
>Hi Steve, All,
>I did modify the motor so that it was synchronous
>without the disk, I don't know what it is with the
>disk and electrodes. I am running at 240bps or 2
>breaks per half cycle so I don't know why losing sync
>would make the TC perform like that.
>I have 2 saftey gaps, one across the cap and one
>across the transformer. The transformer one is in
>parallel with the SRSG, so I think it's okay. Both
>gaps are set to around 15-20kV.
>--- Tesla list <tesla-at-pupman-dot-com> wrote:
> > Original poster: "Steven Ward by way of Terry Fritz
> > <teslalist-at-qwest-dot-net>" <srward16-at-hotmail-dot-com>
> > Did YOU make the motor synchronous? Maybe its
> > loosing sync or just isnt
> > modified correctly (like its running a 3599 rpm
> > rather than 3600 rpm).
> > Though thats seems unlikely, i cant figure what else
> > would cause operation
> > to swing in and out like that. Are you using safety
> > gaps? I hope so! Im
> > also guessing you have tried to play with the
> > phasing? But then again,
> > that should not make operation seem so strange.
> > Steve Ward
> > >From: "Tesla list" <tesla-at-pupman-dot-com>
> > >To: tesla-at-pupman-dot-com
> > >Subject: Problems with SRSG on TC
> > >Date: Mon, 30 Jun 2003 20:10:26 -0600
> > >
> > >Original poster: "Zagarus Rashkae by way of Terry
> > Fritz
> > ><teslalist-at-qwest-dot-net>"
> > <arbitrarily_random-at-yahoo-dot-com>
> > >
> > >Hi all,
> > >
> > >I recently completed an SRSG that runs at 3600 RPM
> > >with a 1/4 inch by 7.5 inch dia Lexan disk, with 4
> > >stainless steel electrodes for 240BPS. I use a MOT
> > >stack running at about 2kVA and a 38nF cap.
> > Secondary
> > >is 1000 turns or so of 22AWG on 4 inch SCH 40 PVC.
> > >Toroid is 4 by 16. I don't know what is wrong with
> > my
> > >TC but it only sparks intermittently, and I think
> > this
> > >is due to my RSG. Any clue as to what causes this?
> > >
> > >The TC outputs 3 foot sparks at best, falling short
> > of
> > >the 3.5-4 feet that I got from an air blast single
> > >gap. It goes "zzzt..." and quits, then after
> > another
> > >20 seconds or so it goes "zzzz..." for about 5
> > >seconds, etc...
> > One thing that I never noticed before was that when
> > running at 3kVA or so the cap's saftey gap fired,
> > sounded like a gun firing many times per second.
> > Thanks in advance,
> > Chris