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>

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
> 
> _