Original poster: "Adam R." <arabraxas@xxxxxxxxxxx>
I'd like to go with a large cap but I just expanded it! I am using the CD
caps (2000v .15uF) and have two strings of 15 for a .02uF cap bank
total...it does not look like I can easily get some more of those caps
(cheaply).
Here are the results of the spread sheet, the inductance is much higher
than I thought.
Diameter of tubing 0.25
separation of turns 0.25
Number of turns per spiral 10
Radius inner turn 4
Separation of spirals 2
length TOTAL 2.5
n TOTAL 100
L TOTAL 3003.5
Also, shouldn't the two spirals be wound in opposite directions so the
magnetic field matches?
I'm worried working with the acrylic: I don't have special bits to drill
with it or saw it so I hope when drilling it won't crack and its only 1/4"
thick. To hold the copper tubing in I'm using PE cutting board strips. How
can I bolt the PE down? I'm guessing just extand 1/8" nylon bolts on the
strips.
The distances btw the two coils will be adjustable so I can experiment
differing setups.
Even just using two layers of 5 turns (6 or even 6.5"dia center) of .25"
Cu tubing spaced .25" apart (hopefully enough room to put 1/8" bolts?)
sounds like it'd work (with the .02uF cap). I'm just worried about using
thin bolts (1/8") but then that'd lower the risk of fracturing the
acrylic. (However, the center holes for the secondary are 1/4")....so
should I shoot for 5 turns? I might even be able to make a crappy mock
setup and test it with my L meter.