RE: BACK ONLINE
Mc> I finished making the toroid- it was a real hard job getting
Mc> the ridges out of the toroid- next time I make one I think I
Mc> will use a car or motorcycle inner tube and use paper mache
Mc> to make a smooth form.
It is not essntial that the toroid be perfectly smooth. Sounds like
you did a good job putting this essential component together.
Mc> BTW, what kind of aluminium tape do you use to cover the toroid
Mc> with? I used this stuff called Denco tape- the top of the tape
Mc> is electrically conductive aluminium but the bottom of it is
Mc> covered in glue that forms an insulating layer. Now that the
Mc> toroid is covered my multimeter shows that one part of the toroid
Mc> is electrically insulated from the other but when I put 15000 volts
Mc> thru it from a small flyback transformer it conducts ok. Do you
Mc> think that the toroid should be electrically conductive at low
Mc> voltages as well- I know that at Tesla voltages and frequencies
Mc> that the insulation on the tape will be no barrier but I worry
Mc> about the heat that may be generated and may burn thru the tape,
Mc> by HV jumping thru the insulating layer.
I would not worry about it. This toroid sounds fine. RF at these
voltages is a surface conductor, so there will be no appreciable
transfer of energy through the glue. The energy will "crawl" over
the exposed surface, right over any isolated sections, rather
than conduct through.
Mc> For a spark gap I am going to try one of your 6 inch plastic pipe
Mc> static gaps.
As I wrote the other day, this is a good gap design.
Mc> Anyway I am having a lot of fun and am really learning a lot by
Mc> reading your posts. BTW have you ever considered writing a book
Mc> on making Tesla coils, experiments to do with them etc. I'm sure
Mc> that it would sell really well!
As I have tried to make clear, I am doing my best to give as much
information away for free as is possible. I send my archives out
for free, charge the minimum possible for the video tape, and try
to take time to give a good answer here whenever possible.
I am not in this for the money, and if I wrote a book I feel I would
have to charge for it.
... If all else fails... Throw another megavolt across it!
___ Blue Wave/QWK v2.12