RE: easy tungsten source?

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

Original poster: "Ted Rosenberg by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Ted.Rosenberg-at-radioshack-dot-com>

Luc:
First, I can always get more carbide from my friend. Unfortunately, it isn't
free. But it is reasonable. He has to buy extra for the company and I simply
reimburse him. At the point you wish to investiagte a purchase, let me know.

Since the donuts are .59 diam, I cannot place them on a copper tube that
measures .5  I am certain that if I did, the spark would jump from the
copper and not the carbide. The support and sink must be significantly less
in diameter than .59

Right now I am leaning towards mounting all 9 on 1/4-20 brass bolts, one
next to each other and placing a hi speed 6 x 6 x 2 inch 120VAC fan so it
blows across all nine. The total width of all nine including a total gap of
.25 will be less than 6 inches (.59 x 9 + .25).

If you have a "coup de genius" please let me know. I have a headache from
this.

Safety first

Ted

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Wednesday, June 13, 2001 8:27 AM
To: tesla-at-pupman-dot-com
Subject: Re: easy tungsten source?


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

Hi Ted

I think too, that you need forced air; the tc donuts have a lower
surface to get rig of the heat and tc is a poor heat conductor.
May be you could try to brass soldered them to copper heat sink.
If I remember well your tc donuts are 1/2" try to solder them to
1/2" pipe cap and use a 2" or 3" length of pipe as heat sink,
maybe this way you don't need force air. I plan to try to make
donuts with tungsten welding rode if I don't have success I hope
your friend will agree to sell more tc donut ( I want to try a
trigger spark with them ).

Cheers, Luc Benard  

Tesla list wrote:
> 
> Original poster: "Ted Rosenberg by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <Ted.Rosenberg-at-radioshack-dot-com>
> 
> Hi Bert:
> Yes, I believe marc metlika used a string of tc donuts with great success.
> But you mention forced air.
> On my string of 9 sweat couplers, each 1.75 x 2, I used absolutely no
forced
> air and it did not seem to make any noticable difference.
> Do you believe the carbide string will demand that I used forced air?
> I have some nice fans I can install in a plenum thing. But if I can get
away
> without FAQ (forced air quenching) I'd prefer to keep it simple.
> 
> Safety First
> 
> Ted
> ==============================
>snip