Re: performance problems + secondary burn

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

Original poster: "Chris Snyder by way of Terry Fritz <twftesla-at-qwest-dot-net>" <csnyder-at-ga.prestige-dot-net>

Hi

I can't really help you.. but mine has been doing the same thing. I 
kinda expected it though... it was a product of boredom and curiousity :)

Specs (as I remember them, it's been dissassembled for storage) :
Conical secondary, 14" at the bottom, 13" at top. 27" winding length of 
24 awg wire
      I wound it on a thin polypropylene form
16 turn primary, 1/4" OD, 1/4" spacing with a slight 10 degree incline 
(just cause I thought it looked cooler :)
      Tapped around 13 or 14 I think
Simple single gap or 5-gap static, both blown by a shop vac
Toroid, 38"x6" with a smaller 21"x3" beneath it
.059 uF maxwell pulse cap
Same type power supply, I've tried with doublers and without
         Current limited by a 220, 25a variac

I get almost nothing with the doublers in place. Some interesting things 
happen with no doublers, just 2 unballested mot's. Each puts out 2400v 
calculated and I measured 1.15 amps with a dmm (gotta be something 
wrong), I did get them from commercial ovens though. It'll arc to about 
15" away to a grounded rod, the streamer travels up the pole like a 
jacobs ladder, and I can see the heat wave when it breaks and starts at 
the bottom again :) it's pretty neat looking. I really freaked my 
brother out when I turned it on for the first time and his hand-held 
games in his room started turning themselves on upstairs :P  I'd like 
build a receiver type coil sometime and see what kind of power I can get 
from it.


Sorry I can't help you, except to give you my experience. Seems like the 
only thing we have in common is the dual MOT supply. Mine will probably 
stay in storage until I can fiddle with it again.

Chris



>Original poster: "Leto Tokarev by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<leto-at-irisz.hu>
>
>hi!
>
>today my secondary melted down :) almos exactly on the middle, like 10
>turns seems to be overheated. the varnish evaporated, and this ten turn
>moved down a bit. 
>
>system parameters:
>4" x 20" secondary, 1000 turns
>13 turn flat primary, tube width 0.160, spacing 0.360, 
>inner diameter 5.5". usually tapped around 4-6 turn.
>100BPS SRSG
>top toroid is 25"x6.5"
>100nF pulse cap
>dual MOT power supply with voltage doubler.
>
>with no current limiting, it gives rather small arcs (6-7")
>with a LOT more topload (like stacking 3-4 toroids), and findig the best
>primary tap point, i got 12-15" arcs. 
>
>whats wrong? the 230V input cable gets overheating, and so small output :)
>
>TIA + greetings from hungary;
>
>
>
>
>Leto
>
>
>
>