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Miller Tungsten Pads
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From: D.C. Cox [SMTP:DR.RESONANCE-at-next-wave-dot-net]
Sent: Saturday, August 15, 1998 2:31 AM
To: Tesla List
Subject: Re: Miller Tungsten Pads
to: Chuck
I believe you said you were running in excess of 15 kva on your system.
You might want to consider a set of our 1 inch dia. tungsten-moly alloy
electrodes. They work fine up to 40 kva for stationary gaps using 2 x 2
inch solid brass as the heatsink. They are tapped for 1/2-13 NC hole. The
1/2 inch dia. Miller's would not deliver the best quench at the peak power
levels you will be running. Been there -- done that.
DR.RESONANCE-at-next-wave-dot-net
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> From: Tesla List <tesla-at-pupman-dot-com>
> To: 'Tesla List' <tesla-at-pupman-dot-com>
> Subject: Miller Tungsten Pads
> Date: Friday, August 14, 1998 10:43 PM
>
>
> ----------
> From: Mark S. Rzeszotarski, Ph.D. [SMTP:msr7-at-po.cwru.edu]
> Sent: Friday, August 14, 1998 7:11 AM
> To: Tesla List
> Subject: Re: Miller Tungsten Pads
>
> At 08:32 PM 8/12/1998 -0500, you wrote:
> >
> >----------
> >From: Chuck Curran [SMTP:ccurran-at-execpc-dot-com]
> >Sent: Wednesday, August 12, 1998 10:57 AM
> >To: Tesla List
> >Subject: Miller Tungsten Pads
> >
> >Hello All:
> >
> > In the process of reviewing my coil project prior to the upcoming
testing,
> >I have to admit I don't have the best rotary stationary contacts in
place.
> >I rebuilt the moving electrodes but thought I'd do the stationary when I
got
> >around to it. Now is the time.
> >
> >Some time back a Miller Electric tungsten contact pad was mentioned by
> >someone, along with a Miller part number. As I recall this tungsten pad
was
> >"about" 1/2" in diameter and had either a threaded stud or a hole for a
cap
> >screw to hold it to a mounting surface. If you still have that part
number,
> >would you please repost it? I then can go to a friends welding supply
shop
> >and pick up, or order, the item if it is appropriate for my needs.
Thanks
> >in advance.
> >
> >Chuck
>
> Hello Chuck:
> There is an excellent gap material available in the U.S., and
probably
> elsewhere in the world. These are tungsten contact points made by Miller
> Electric Mfg., Co. for their TIG welders. Their part number is 020-603
if
> my notes are right. They cost under $4.00 each. Look in your local
yellow
> pages for your nearest Miller dealer.
> Each electrode is a 1/2 inch diameter by 1.5 inch long steel
> cylinder with a 3/8 inch tungsten electrode imbedded in one end. These
work
> great for static gaps (5 pairs in series, each gapped to 0.020 inches,
with
> forced air) and they are good for the stationary part of a rotary spark
gap.
> One can drill and tap the end to fit a #10 screw, or mount them in a
solid
> block of aluminum with a set screw to position them.
>
> Regards,
> Mark S. Rzeszotarski, Ph.D.
>
> >
> >
> >
> >
>