Original poster: Rich Simpson <richcreations@xxxxxxxxx>
On Dec 29, 2004, at 2:39 PM, Tesla list wrote:
Original poster: "Black Moon" <black_moons@xxxxxxxxxxx>
Uh guys, there IS no cost diffrence beween 120v at 60amps and 240v at
30amps, your charged by the watt, not by the amp.
I was the original poster, and I do not think that anyone said anything
about 120v 60-amps vs 240v 30 amps, we were talking about 240v 60 amps vs
240v 30-amps which is half the watts.
I did say I had a dual 120v variac but 2 legs of 120v is 240v which is how
I am using the unit, as such the unit is rated to 240v/22-amps, I want to
keep my current low enough to not burn out my variac, So I need an
inductor(s) that will do this. I am aware that I will need two of them,
one for each 120v leg. someone suggested 500' rolls of #10 or #12 wire,
that sounded easy, and I have seen such on the net, but he also said it
would be around 26-amps, what confused me is that when I have seen this on
the net, there was no core and I sorta thought you needed one. I have seen
on the net where someone wound wire around a pvc pipe that they could fill
with welding rods. If a 500-ft roll of #12 wire with no core will limit to
26-amps, would 500-ft of wire wrapped around a pvc pipe with out a core
also limit to 26-amps, or does the # of turns matter more then wire
length? then I could add a removable core to further limit the current.
Let me know if I am completely misunderstanding the concept here...
From: "Tesla list" <tesla@xxxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: Re: MOT info
Date: Tue, 28 Dec 2004 11:49:28 -0700
Original poster: Rich Simpson <richcreations@xxxxxxxxx>
I wouldn't worry about the difference cost wise between 30A and 60A
draw. Assuming you run it for an hour a day at ~14 kW (plenty enough to
annoy/scare the neighbors/police/swat team) over a month that's $84 vs.
$42 for ~7kW. I seriously doubt you'll actually run it that much before
spark gaps need replaced, ears need a rest, etc. I think it's always
easier to use inductive ballasting and cheaper. With caps you'd need
lots of them in parallel to handle the 30-60A and you'd need lots of uF
(about 100uF for around 25A limiting off the top of my head). I haven't
actually tried this myself, but seems like the caps would heat up like
resistive ballasting. I personnly would just use the hardware store
ballast, (2) 500' rolls of 10-12 awg for 26A limiting.
I just got my new bigger variac, it is a new dual 120V/22A (motorized)
unit that I paid dearly for, and I really do not want to burn it out,
what should I do to get the current down to 22A@240v? Again this was for
a 6 or 8 mot stack (which is just until I can save up for a pig or more
neons as all I have is a 6kv/30ma neon (and that is just not enough for
my 4 inch coil ;-)
Thanks Again
-Rich