Re: Progress ?

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

Original poster: "Sundog by way of Terry Fritz <twftesla-at-qwest-dot-net>" <sundog-at-timeship-dot-net>

Hi James :)

   Only time I've had toroid heat problems, is on the Quad 833 when I'm 
running a single 1.5x6 toroid, and that's due to poor connection between 
the base of the breakout point and the toroid (drywall screw stuck through 
a piece of masking tape...)  For electrical connection to the top winding, 
I use a piece of 12ga soldered to a ring lug, and the thin magnet wire 
wrapped and soldered to the 12ga.  The mounting stud is 10x32 brass 
threaded rod, using brass nuts and washers.  There's no heat at the 
connection point there.

  Beats me. Try using masking tape to connect strips of copper or aluminum 
foil between the two toroids and see if that fixes it.  May be heat from 
arcing between the toroids?

Shad G3-1203

At 01:44 PM 6/10/2002, you wrote:
>Original poster: "James by way of Terry Fritz <twftesla-at-qwest-dot-net>" 
><mustang3-at-cox-dot-net>
>
>Hi Tesla guys,
>     Things are moving well. On my big coil (12.4 in X 62 in. winding length),
>I'm only getting 7-8 foot sparks with the ARSG. I'm not back into tune yet. My
>short secondary (12.4 X 38 in. winding of #20) burst into flames, on 2
>occasions. This means a complete rewind. So I am using the big secondary which
>is wound with 3 sizes of wire #14 for 8, #18 for 42 in., and # 20 for 11 in.
>About 1370 turns of wire. During testing and tuning, 2 of my large caps died.
>The remaining caps tune me way out on the primary coil(about 10 turns (-at-70 Nf
>primary cap)). Ok, all of the history aside here's the problem. I have a small
>toroid at the very top of the secondary and above it one of the nice formed
>aluminum ones(approx 9 X 21). The small toroid gets hot! "I kid you not"; I
>have never noticed if the little guy got hot before. So, does anyone else have
>probs in this nature? I think I need the little toroid to control breakout 
>from
>the secondary's top windings. I have a been limiting the input current to 
>40-50
>amps.
>     I have been using many thin layers of Goop as a insulator on top of the
>secondary. This stuff works well. Racing sparks help to a minimum.
>     Also I thot I'd put my $0.02 in on the ballasting choke. I used two 600
>feet long pieces of #10 wire wound parallel on a masesonite(sp) form 1 1/4
>square inside X 17 in. long. The core is insulated(painted with clear) 1/16
>welding rods cut to 15 in. or so and stuffed into a piece of PVC thinwall 
>about
>2 1/2 feet long (one end gets the rods). Then I pour some urathane glue into
>the mess, and it's sealed. I lock the the core with a overcenter device. This
>permits easy adjustments of the pole xmfr's current.
>
>                             Later,
>
>                                 James