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Re: Secondary structure

Original poster: "Alexander Rice by way of Terry Fritz <twftesla-at-qwest-dot-net>" <alex-at-rices.myip-dot-org>

24/05/2002 15:21:07, "Tesla list" 
<tesla-at-pupman-dot-com> wrote:

>Original poster: "by way of Terry Fritz 
<twftesla-at-qwest-dot-net>" <Dan_Gallagher%
>Hi fellow sparkers,
>I want to make my secondary this weekend 
but have a question.
>Can I use all-thread down the center of 
the secondary to hold the plexiglas
>discs on the ends and to mount the toroid 
onto the top? This will also make
>it easier to wind the wire on with all-
thread stubs sticking out each end.
>I can use those stubs to hold the 
secondary in the lathe. But I'm wondering
>if I can leave the all-thread in during 
operation of the TC.

i take it that by all thread you mean a 
long threaded metal rod - in which case, 
yes you can use it while building the 
secondary to hold endcaps (which usually 
go inside the tube by the way - for small 
coils i never bother with endcaps and i 
have not yet had a problem). What i did to 
wind my coils was to make two stepped 
wooden discs - one part which fits snugly 
into the tube and one part that is too 
big. Mounted the whole lot into a large 
wood lathe with the drive belt slacked 
RIGHT off so that i could stop it with my 
pinkie and wound the whole 1200 turns in 
about 3 mins.

i have also found that shellac is great 
for varnishing coils as it dries very hard 
very quickly and only needs a few (2-3) 
coats - you have to be sure to brush along 
the direction of the wire otherwise you 
get a lot of tiny bubbles as the brush 
runs over the wire. ie wire lies ||||| 
brush up and down.

You cannot leave the rod in during 
operation as it will be a dead short and 
you will not get any streamers.


>Ft. Lauderdale
Alexander JJ Rice
Rank : G-2 (Wahey!)
"Because the Geek Shall Inherit the Earth