Re: A few questions

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

Original poster: "Jon Tebbs by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jgtebbs-at-eos-dot-net>

Hi Jason,

On question number one, you are correct about using two turns through the
window and the connections.

If you have a scanner, you might try this trick I've used successfully to
rescale meters. Carefully open the meter case
and remove the scale. Scan the scale and use Photoshop to change the
numbers to the desired range. Print the modified
scale on card stock, lay the original scale over the printed scale and cut
out around it with an x-acto knife. Install
the new scale.

This is rather delicate work as the movement and especially the pointer can
be easily damaged. As always, YMMV.

Good luck,
-- 
Jon G. Tebbs
<jgtebbs-at-eos-dot-net>


Tesla list wrote:
> 
> Original poster: "Jason Johnson by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <hvjjohnson13-at-hotmail-dot-com>
> 
> Well I've had a few questions in the back of my mind for a few days now
so here
> goes:
> 
> 1. I have two nice 0-75 amp AC ammeters with 5 amp full scale movement.
Thus I
> need 75-5 (15-1) current transformers. I also have two 150-5 (30-1), but no
> 75-5 current transformers. Since my CTs are twice the size I need can I just
> wind two turns in the winding window on the CT? I'm assuming that this is how
> you hook them up (they are square shaped with two terminals on top and a 2"
> hole through the middle) and that they only normally have the hot line
passing
> through the middle.
> 
> 2. Could a three phase transformer be run from a single phase to three phase
> converter for motors like the one here
> <http://www.metalwebnews-dot-com/howto/ph-conv/ph-conv.html>http://www.metalweb
> news-dot-com/howto/ph-conv/ph-conv.html
> 
> 3. What would a "tripolar" tesla coil look like (like a bipolar but three
coils
> run on three phase) i.e. spark behavior, appearance?
> 
> Jason Johnson