Re: Latest WCSTSG

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Luc by way of Terry Fritz <twftesla-at-qwest-dot-net>" <ludev-at-videotron.ca>

Hi list,

So glad the list is there again Tx Chip. 

First could you describe what problem you had with carbide. I use
this post to report my progress in building my version of the
trigger spark gap, I really like to have your comment all, on the
list or privately, here is the link and please be indulgent it's
my first try with html and I use netscape for writing it:

http://pages.infinit-dot-net/luc2/sg/trigg_sg.html

Cheers,

Luc Benard

Tesla list wrote:
> 
> Original poster: "Terrell W. Fritz by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <terrellf-at-qwest-dot-net>
> 
> Hi Marc, Ted and the List,
> 
>         Even though the list is down (not sure why but i have a note into
Chip
> about it), I have been working on the Water Cooled Sync Triggered Spark Gap
> (WCSTSG).
> 
> I simplified things now that I know what works and added some nice wood,
> easy adjustment, and even a nice viewing window ;-)  I went with pure
> tungsten electrodes since the tungsten carbide was giving me problems.
> There are a bunch or different alloys and I guess you have to have the
> right ones.  The 1/8 inch pure tungsten welding rods seem to do great
> without wear.  I cut them to about 3/4 inch and pressed them into MIG
> electrodes that were drilled to 1/8 inch.  If the hole is loose, a few very
> light taps with a hammer will tighten them right up for pressing. I
> sharpened the tungsten to give a slight nail tip so it would not gall while
> being pressed in.  The MIG tips are some type of alloy that drills very
> nicely.  The gap is 6.5 wide, 5.0 deep, and 8.25 tall.  The front window is
> a 4.5 x 5.25 inch welders glass for helmets that is a shade value of 9.  It
> allows you to see what the gap is doing safely.
> 
> I figured that the water filled tubes would run 2 hours without a refill
> but that is assuming the air does not help cool them.  Of course, the water
> volume can be increased if needed.  I drilled the mounting hole to 3/4 inch
> and I have flat washers so they can be positioned as needed.  I just used a
> ring of 1 inch copper pipe for the field distorting trigger ring.
> 
> I snapped a bunch of pictures below which are pretty self explanatory.  I
> need to check to see if 250pF isolation caps, in-line 5 ohm resistors to
> the coil, and resistor type ignition wire reduce the noise back to the
> dimmer control, reducing the need for the big load resistors.  Other have
> mentioned that this works well...
> 
> http://hot-streamer-dot-com/temp/TerrysWCSTSG/
> 
> This gap could be enclosed too.  I tried covering to top but it seemed just
> as loud, but I was running without a secondary so the gap was dissipating
> the full cap energy.  I also noticed that the ozone an NOx build up in the
> box if it is closed.  After running it, I pulled the top off and the fumes
> almost knocked me over :<O
> 
> Cheers,
> 
>         Terry