JAVATC uses GEOTC for it's core functions. GEOTC, developed by Paul Nicholson, enables accurate computation of capacitance's and inductance's. At Tesla Coil frequency's, currents become non-uniform and affect all parts of the system. Geometry and proximity of components also play a major role in these variances. JAVATC has taken advantage of GEOTC's power to sort out and apply these variations for a highly accurate coil design tool.
To begin, select "cm" or "inches" as your input unit. Enter all dimensional inputs in the unit type selected. Outputs of the program will be in the same units.
Input your design parameters into the input boxes. JAVATC uses radius inputs enabling the design of flat, helical, cone, and inverse cone coils. All radius and height inputs can be inverted to change the grounded end vs the hot end (LV end and HV end).
All input boxes can be used as a calculator. For example, if your coil diameter is 4.5 inches, enter 4.5*.5 and click or tab out of the input box. The value will change to the coil radius. If you have a need to use expressions, enter ".." into the input cell and tab out. This will pop up a message listing expressions and syntax the program understands.
For HELP on coil design inputs, click the ? link at the left of each input row. All links should be this color including the output descriptions (each output description has a pop-up help/info file).
When your finished with inputs, click the RUN JAVATC button. The program will begin computations and should take about 30 seconds with a 900Mhz processor speed (15 seconds on a 2GHz machine). Much depends on the complexity of the design, your browser, and your processor speed. IE6 and Firefox run faster than all others.
During a run, browsers usually pop up an alert after a few seconds stating the script is causing the browsser to run slow. It will provide you an option to stop the script (actual message depends on browser). This is normal browser behavier and cannot be prevented (easily), thus, it's an annoyance. Click the appropriate button to allow the script to continue. This alert is a safety feature to prevent a browser from becoming stuck in a loop of code (a good thing, but poorly implemented). I guess browser designers didn't expect Javascript to run this type of program.
To stop this annoying alert message if using Internet Explorer or Firefox, click Stop Browser Annoying Script Alert.
All linked pop-ups open in their own window (JavaTC stays where it is).
JavaTC can Auto-Tune the coil for you if you select the "Auto-Tune" checkbox next to the RUN JAVATC button. Following the run, check the height and radius changes in the input boxes of the primary, as these are adjusted for you.
JavaTC includes some Transformer, Rotary Spark Gap, and Static Spark Gap equations. Some outputs require a coil and/or tank capacitor to be installed (the program will let you know).
At the top of the coil inputs is a button named Consolidate. Clicking this button will build a consolidated list of your design in a text area at the bottom of the page (to save to your hard drive, copy/paste in an email, or whatever).
Lastly, there is a button at the top of the form named Load Demo Coil. Clicking this button loads a demo coil into the form which you can run. The purpose is just to give an example. This little coil was a test coil thrown together for measurement purposes.
I hope you find this program useful...............Barton B. Anderson