Hybrid-Maggy

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

Original poster: Bart Anderson <classi6-at-classictesla-dot-com> 

Hi All -

Thought I'd share my experience today with my new hybrid-maggy first light.

First of all, it is a magnifier by L1C1, L2C2, L2C3 design. L1C1 is 
comprised of a 4.7 turn primary (3/8" copper tubing) and a bank of three 
.02uF 60kV CSI caps for a total .06uF cap bank. The driver (L2C2) is 250 
turns of 18g closewound on a 12.75" diameter form. L3C3 is a 4.5" coil of 
24g at 900 turns also closewound. The top toroid on the L3 coil is 9"x30" 
spun Al.

I mentioned recently in another post of a hybrid-maggy design, where the 
"extra" coil is directly over the top of the driver. It is a compact maggy 
(in a sense). I used Javatc to design this. This isn't an easy task. 
Basically, I went back and forth between L1 and L2 designs and L3 designs. 
I achieved this by modeling the L3 coil and topload along with using the 
cylinder object in Javatc (grounded) for the L2 and L1 coils at their 
relative positions to the real situation (heights, etc..). I came to 180kHz 
when all was said and done. I then modeled the driver (L2) coil in the 
secondary design and primary (L1) in Javatc and then used the topload 
object area to model the L3 coil (as a cylinder, selected for topload) and 
the toroid at topload.

In the end, I was able to match all 3 resonant frequency's required for 
this crazy hybrid-magnifier. My goal was basically "could it be done with a 
program". The answer is YES! Yes, it can! Of course it can. It's just a 
matter of getting all the parameters correct and having a program that 
accurately accounts for object proximity's.

I set everything up as designed in the program (everything). Originally, I 
had k at nearly 0.6 and did get some arcing between L1 and L2 (as mentioned 
in the previous post). Today, I went though Javatc again for a k of near 
0.4. All parameters came out nice, so I went ahead and raised the driver 
accordingly. I then fired it up.

As is no surprise, the system works great! That little 4.5" extra coil was 
creating 5 foot discharges right off the bat. I was gleaming with satisfaction!

Right after, my daughter said, "Dad, you know, we have the video camera". 
Oh, that's right! The video camera is old, but does work (at times). So, I 
set it up and shot some video of sparks as well as some other tid bits 
regarding this system. Next week I'll take the video to work and convert it 
to windows media video for on-line viewing.

Take care,
Bart