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Transformer CGI program
Bruce,
Sure, I'll take another guest program :-)
I'm curious about what calls are considered tight and which are known not to be.
But that's not a neon thread.
The volts per foot (at 30ma) info is as follows:
10 mm neon 360 v/ft
10 mm arg-merc 255v/ft
12 mm neon 290 v/ft
12 mm arg-merc 210 v/ft
15 mm neon 220 v/ft
15 mm arg-merc 160 v/ft
Use about 300v for a pair of electrodes on a neon unit.
and 225v on an arg-merc unit.
You'll find that you can extrapolate a smooth curve between 8mm and 20mm.
below 8mm is a different ball game as conventional transformers are not
optimized for this region.
Once you've arrived at your figure - nice by the way because you can easily
mix gases and diameters etc. - you round off to the next highest
transformer. In case you don't know these are:
2k, 3k, 4k, 5k, 6k, 7.5k, 9k, 12k, 15k
If you are writing a program for selecting multiple transformers, you need
to take into account where in terms of _units_ you can break the circuit
into multiple circuits. In general this is done in a relatively balanced
way i.e. two 9ks rather than a 15k and a 3k. It depends on the situation.
As I mentioned I have an algorithm. I'm porting a variety of earlier qbasic
routines related to neon into one vbasic program. If you want to have a
look let me know.
BTW the reason the above method is better than the chart is because the
chart is derived from this method. The chart is therefore not the true
curve. Also manufacturers bias the chart toward the properties of their
product.
Hope this is helpful.
Kenny
Kenny Greenberg Neon Artist, Scenic Specialist, Columnist - Internet World
c/o KRYPTON NEON 34-43 Vernon Blvd Long Island City, NY 11106
Ph: 718-728-4450 Fx: 718-728-7206 Email: kenny@neonshop.com
http://www.neonshop.com gopher://gopher.panix.com:70/11/nyart