Re: Combination Coil (was conical secondary) (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Wed, 20 Jun 2007 04:07:38 -0700
From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Combination Coil (was conical secondary) (fwd)

Hi Dave,

Something you may have missed in my post was that I used a version of 
Javatc on my hard drive so that I could enter the flat coil as the 
grounded end. Javatc assumes in the coil inputs that Radius1 and Height1 
is the grounded end, therefore, the dimensional inputs would need to 
follow suit. I think your going to have an error message pop up if you 
try to enter your outer diameter in Radius1. So, I'll need to send you a 
zip file with Javatc that can do this without those limitations. I've 
been working on some other things as well and just haven't yet finished 
those updates. Once I do, the online and download files will be able to 
do this. I'll send the file to your email.

I did want to answer some questions here, see comments interspersed below:

Tesla list wrote:

>---------- Forwarded message ----------
>Date: Thu, 21 Jun 2007 10:10:10 -0500
>From: David Thomson <dwt@xxxxxxxxxxxx>
>To: 'Tesla list' <tesla@xxxxxxxxxx>
>Subject: Combination Coil (was conical secondary)
>
>Hi Bart,
>
>I downloaded your JavaTC program, but I didn't see instructions for setting
>it up.  BTW, is there some way to save my own default settings?
>  
>
Sorry, just upzip it to your hard drive and open javatc.html in the 
directory it's saved to. This will open up the program and then it's 
just like as if you were using it online.

There is a file you can edit to input your own default numbers. I'll 
tell you those tid bits offline.

>After seeing Jeff's coil setup using a brass tube, I'm going to try the same
>thing with one of my flat spiral coils.  I have a few questions.
>
>When you input my three coil system, did you simply enter the tall solenoid
>coil as a cylindrical topload with identical physical dimensions?
>  
>
Yes, exactly. I installed the disc secondary into the secondary inputs 
and the primary into the primary inputs. I then installed a cylinder as 
a topload object with the exact dimensions and placement of your 
solenoid coil.

>How did you enter the flat spiral into the secondary fields?
>  
>
I'll tell you specifics here offline. This kind of stuff can get really 
long and boring for the rest of the list.

>Do you think there is any difference in the third coil frequency for open
>and closed waveguides? 
>
Very little, but yes there is a difference.

>I'm wondering if I should cap the waveguide at the
>top, bottom, or both.  If I use caps, I'm thinking I can leave the top cap
>loose and use it for fine tuning the coil.
>
Caping the bottom is probably a good idea. If you use two solenoids in a 
telescoping arrangement, you will then have an easy way fine tune.

>Also, I would like to use a sphere at the top of the cylinder.  Would it
>work to just add both the cylinder and spherical toploads?
>  
>
Yes. Add the cylinder and then simply use the sphere inputs for the 
sphere size and position.

I'll talk more offline. BTW, last night I tried some ring objects 
modifying code to accept 50 toroids. I inserted 20 1/4" cylinders and 
man it took over 30 minutes to do a single run (trying to do that 
inverse cone object).

Take care,
Bart