Re: JAVATC version N

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Yurtle Turtle <yurtle_t@xxxxxxxxx>

Thanks for clarifying the dimensions. I always used
the average dimensions for ID. For ID, I had a minimum
dimension of 1.5" clearance with 3/8" tubing. That
means I had 2.25" clearance just before turn one. I
used 14" for my primary which is the same value I'd
get using your figure. However, I was off by 3/8" for
OD.

Adam

--- Tesla list <tesla@xxxxxxxxxx> wrote:

> Original poster: "Barton B. Anderson"
> <bartb@xxxxxxxxxxxxxxxx>
>
> Hi All,
>
> I updated Javatc for primary dimensional purposes.
> Sorry if this is
> off topic at times, just like to keep you all aware
> of any changes made.
>
> Anyway, I've noticed coilers now and then are off on
> their tune point
> a turn maybe. Well, I ran into the same thing
> myself. I've been
> building helical and cone primary's for some testing
> of my own. I
> used the same tubing (pulling it on and off out of
> 3/8" acrylic
> standoffs). Eventually, it was a mess to reuse. So,
> went out and
> purchased new tubing to rebuild my flat primary
> (which I normally
> use). The standoffs were 2" ht, with .25" tuning,
> .25" spacing (edge
> to edge). Anyway, after assembly, I measured inner
> and outer
> diameters and it wasn't in tune!! So, I figured I
> had messed it up
> the measurement. I did. Remeasued, came up with 7.3
> turns, tapped,
> sparked, and sure enough 50" arcs on a 12/60 NST.
>
> I thought there are probably coilers using Javatc
> who have ran into
> the same problem. So, I drew up an image to identify
> just what Javatc
> is looking for when it comes to primary's. This
> image will now be in
> the help popup for the primary.
>
> Here's a look.
> http://www.classictesla.com/java/script/primeas.gif
>
> I now it's simple, but you might be amazed at how
> people "guess" at
> this particular measurement. Just thought I would
> help any misconceptions out.
>
> BTW, in the process of building these primary's
> using acrylic
> runners, I found a simple way to ensure a tight fit
> yet still be able
> to snap the primary in and out as necessary. Simply
> use a hacksaw and
> slice 1" down the runner starting at the bottom
> inner of the socket.
> It adds plenty of flex for the "snap action".
>
> Here's an image of what I'm describing.
> http://www.classictesla.com/temp/Pristand.gif
>
>
> Take care,
> Bart
>
>
>