Re: A real 1/4 wave TC

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Skip Greiner <skipg@xxxxxxxxxxxxxxx>

Gerry
I would appreciate it very much if you would run a simulation. What 
do you need from me to do it.
Skip


Tesla list wrote:

> Original poster: "Gerry  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>
>
> Hi Skip,
>
> Don't forget the simulations.  If your SRSG is incorrectly timed 
> (and nothing else breaks down), you could get up to 200KV on the primary.
> If the SRSG is timed optimally, you would still have around 20KV on 
> the primary. Hope this doesn't kill your 9KV 120ma NST.  You might 
> consider an ARSG that has much higher than 120BPS.  I'll be happy to 
> run a simulation for you.
>
> Gerry
>
> > Original poster: Skip Greiner <skipg@xxxxxxxxxxxxxxx>
> >
> > Hi All
> > Well I finally get some power into this proposed 1/4/wave unit. The 
> > final specs are as follows:
> > Secondary
> > Dia: 18 x 24
> > Winding length: 19.25
> > Wire: #18ga with plastic coating giving diameter of about .067
> > Turns: about 285
> > Wire length: 1366' which is about 227khz at 1/4 wave
> > JAVATC resonance: 227 khz
> > Resonance (measured, un-powered): about 226 khz
> > Operating frequency (measured, powered): about 210 khz
> > Top load: NONE (see below)
> >
> > Primary
> > Dia: 22.5
> > Turns: 4
> > Wire dia.: .375
> > Cap: .034
> > JAVATC Resonance: 205khz
> >
> > Break: SRSG, 1800rpm, 4 pole
> >
> > Tranny: 9kv @ 120ma NST
> >
> > In order to reduce the racing sparks the secondary had to be 
> > elevated with the lower turn of the secondary about 4.5" above the 
> > top turn of the primary. Per JAVATC this reduced the k to .135
> >
> > In order to reduce the corona from the top turn of the secondary, a 
> > 0.5" strip of aluminum foil was placed about 4.5" above the top 
> > turn of the secondary and the final turn of the secondary was tied 
> > to it. This went all the way around the secondary form.
> >
> > Prior to literally blowing up the primary capacitor a ring of 36" 
> > streamers was produced all the way around the aluminum foil. 
> > Strikes exceeding 40" happened about 40% of the time.
> >
> > I was operating at about 65 to 70 volts input at this point. The 
> > input current as measured by an iron vane AC ammeter was about 25A. No pfc.
> >
> > The cap literally blew up at this point and so ended the day. I 
> > will now start to build an MMC and try to increase the coupling and 
> > run the tranny up to 120v input.
> > Skip