Re: Huge Dumpster Auto-Transformer I PULLED out whew!

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

Original poster: "Ben McMillen by way of Terry Fritz <twftesla-at-qwest-dot-net>" <spoonman534-at-yahoo-dot-com>

WHOOPS! I knew I forgot something.. ;)

The equation should be:

Vout = Vin[R2(R1 + R2)]

Where Vin is the input voltage.. 

Coiling in Pittsburgh
Ben McMillen

> 
> Hi Dan,
>   The 'short' on the AC line setup is what's called a
> voltage divider.. 
> 
> If you name the resistance (or reactance in the AC case)
> between 'hot in' and 'hot out' R1 (or X1) and the
> resistance between 'hot out' and 'neutral out' R2 (or
> X2):
> 
>  Hot     ---3
>             3
>             3 R1 (X1)
>             3
>             3 <--------------
>             3               |
>             3 R2 (X2)      Vout
>             3               |
>  Neutral ---3----------------
> 
> (You're right, the ASCII drawings are growing on me!)
> 
> then the voltage between 'hot out' and 'netural out' is
> defined as:
> 
> Vout = R2/(R1 + R2)
> 
> You can also name R1 -> R1(x) and R2(1-x).. where x is
> used
> to represent the 'variability' of the wiper.. ;)
> 
> Hope this helps! (and I hope I didn't make a mistake!)
> 
> Coiling in Pittsburgh
> Ben McMillen
> 
> 
> --- Tesla list <tesla-at-pupman-dot-com> wrote:
> > Original poster: "Dan by way of Terry Fritz
> > <twftesla-at-qwest-dot-net>" <toodamtall1-at-yahoo-dot-com>
> > 
> > Hi folks,
> > Thanks for the tips on dumpster diving. I also
> > collected a couple microwaves last big garbage day but
> > got discouraged from using them after reading the
> > negative stuff on the net about using MOTs vs. NSTs in
> > a TC. <sorry MOT folks, no offense> Chris, your story
> > was very amusing to me and my office-mate here.
> > 
> > This huge auto-transformer I found in the dumpster
> > does not have a secondary. It's basically a big double
> > layered coil on a ferrite (HUGE) donut (toroid?). I
> > was told I may be able to use it to vary the ac going
> > into my NST. 3= windings. Plus I will need an awfully
> > flexible wire to attach to the wiper (ground braid?).
> > It seems strange to me to put a short on an ac line
> > like this. Your thoughts are greatly appreciated. 
> > 
> > hot in  ---3
> >            3
> >            3 <--- hot out
> >            3
> > neutral ---3----- neutral out
> > 
> > I never thought I'd see the day where I would need to
> > make these "geeky" ascii drawings. But I see why you
> > guys do it now. I am grateful to be among you experts
> > and I think I'm learning your language hehe.
> > 
> > Dan
> > Ft. Lauderdale
> >