Re: Questions from a newbie in Australia

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

Original poster: "Paul and Tracey Arrowsmith by way of Terry Fritz <twftesla-at-uswest-dot-net>" <p_t_arrowsmith-at-hotmail-dot-com>

There are Aussie coilers out there, Im one, have a look at 
http://www.tcboa.iwarp-dot-com for more info.
Paul A


>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: Questions from a newbie in Australia
>Date: Mon, 23 Apr 2001 12:42:41 -0600
>
>Original poster: "Stacy Gillett by way of Terry Fritz 
><twftesla-at-uswest-dot-net>" <sgillett-at-hotmail-dot-com>
>
>Hello all...
>
>I'm a uni student from Geelong (a town near Melbourne in Australia), and 
>I'm
>planning to build my first coil.  I've got most of the parts together, but
>I'd like to ask some questions before I start putting anything together:
>
>1.  Instead of a single NST, I have two 15/25 units.  The problem is that
>they both have one side of their secondaries shorted (in effect, they can
>only put out about 7500V each).  The guy at the sign shop I got them from
>said that I could get 15kV out by tying their centre-taps together and
>taking the HV from each of the good secondaries (the bad sides are not
>connected to anything).  Assuming that I had the primaries wired up in
>parallel and in the correct phase, would this arrangement work?
>
>2.  I'm planning on using a 4" x 20" PVC secondary form wound with #22AWG
>magnet wire.  With this size secondary, what would be best in terms of
>coupling: a flat primary or a saucer primary?  I've heard that for the
>smaller diameter secondaries like mine, a saucer is better, but a lot of
>people seem to recommend the flat primary.
>
>3.  As I can't really afford a Variac at the moment, I was planning on 
>using
>a 100W light globe in series with the mains input so as to lower the NST
>output voltage until I had tuned the primary.  Quick and dirty though it 
>is,
>is there any reason why this wouldn't work?  If it would, is 100W in the
>ballpark for the globe wattage?
>
>4.  At these power levels (~375VA), is there any real benefit in cooling 
>the
>main gap with a muffin fan or similar? (My main gap will be 11 x 3/4" x 3"
>length copper tubes, .028" spacing)
>
>Although these are only fairly minor queries, I'd be grateful if someone
>could clear them up for me.
>
>Thanks,
>Stacy Gillett
>
>P.S.  Are there any coilers from the Melbourne/Geelong region on this list?
>It'd be good to hear from someone local who's actually got a coil up and
>running, as my parents tend to think I'm crazy doing this stuff by myself 
>:)
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