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Re: A RSG poser...
From: Daniel W. Hess pager; 214 910 8489
1605 LBJ Fwy. Daniel Hess-at-Vnet.ibm-dot-com
Dallas, TX 75234 territory R21 B/O 519
Subject: Re: A RSG poser...
Dr. Resonance;
Just curious, what was the mass of the brass electrodes you used and at
what power level were you running?
Daniel Hess
*** Reply to note of 08/22/97 10:52
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Subject: Re: A RSG poser...
Date: Fri, 22 Aug 1997 08:15:19 -0500
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From: DR.RESONANCE[SMTP:DR.RESONANCE-at-next-wave-dot-net]
Sent: Thursday, August 21, 1997 1:58 PM
To: Tesla List
Subject: Re: A RSG poser...
To: Dan Hess
An interesting idea but it might not work. We tried brass once and its
expansion coefficient was to extreme for any practical use. The problem is
trying to keep everything parallel once the heat rapidly builds. Only
tungsten/molydenum alloys seem to work if they are bonded to the brass
material. Nice try though.
DR.RESONANCE-at-next-wave-dot-net
>
> From: Daniel W. Hess pager; 214 910 8489
> 1605 LBJ Fwy. Daniel Hess-at-Vnet.ibm-dot-com
> Dallas, TX 75234 territory R21 B/O 519
> Subject: Re: A RSG poser...
> This post didn't make it out to the list yesterday so I'll try again. DWH
>
> *** Reply to note of 08/20/97 10:33
>
>
> From: Daniel W. Hess pager; 214 910 8489
> 1605 LBJ Fwy. Daniel Hess-at-Vnet.ibm-dot-com
> Dallas, TX 75234 territory R21 B/O 519
> Subject: Re: A RSG poser...
> Chuck;
> Thanks for the feedback. Your anology of the sliced-up cucumber is great.
> Trying to describe something technical to others without the aid of draw-
> ings is a challange to me. Plus I try to avoid ASCII art if possible al-
> though I may succumb to it yet.
>
> Imagine four or five glass rods, approx. .5" dia. in parallel to each
> other except when viewed from either end, they are arranged in a semi-
> circle, with the concave side up. Now the whole "sliced brass cucumber,"
> is set down, or in, to rest in this cradle.
>
> If I were to use say, 12 brass slices, each 1.5' long, then the total
> assembly would be 18' long. But I still would need to expand the slices
> apart, to form the actual gaps. Just how far apart depends, of course, on
> the particular application as well as dialing the thing in.
>
> The traction between the glass rods and the brass slices vs. the thermal
> expansion of the brass is something I may have to just try and see. The
> glass rods will have to pinch the brass tight enough to hold them in
> place, (and I may be underestimating just how much those guys may try to
> move! I was suprised to learn that my rotary darn near comes to a
> screeching halt when under a heavy load,) and yet the outer cradle assem-
> bly will need to be spongy enough to have some "give," to allow for
> thermal expansion.I may even sleeve the the top outer glass rods with
> silicon tubing; Could stand the heat yet provide decent grip on the brass
> pieces. Hmmm, I'm thinking this stuff up as I go along.
>
> I plan on using clear flex vinyl tubing and "tees" to form a flexible
> manifold for a delivery system from the air pump. Question, though; When
> you asked;
>
> " Cool it would, but is it also going to eventually
> conduct? Again, just something to consider. Many on the list, myself
> included have made vacuum gaps that pretty well accomplish what you are
> outlining within your design."
>
> Are you suggesting that too much CFM, (velocity of air,) might prevent
> the gaps from firing at all? If so. I believe that using an inline exit
> valve on the input side of the manifold would allow me easily control the
> volume of air acting on the gaps. If I've misconstrued your question,
> please set me straight.
>
> As far as vaccuum vs. pressure, I'm not convinced that either is superior
> as far as quenching the gaps is concerned. I think that the CFM is what's
> important as to whether you achieve it with either vaccuum or pressure.
>
> If there's anything here that you like, or especially don't like about my
> design so far, I'd sure like to hear about it.
>
> Thanks,
> Daniel Hess
>
>
>
> From: Chuck Curran[SMTP:ccurran-at-execpc-dot-com]
> Sent: Tuesday, August 19, 1997 8:33 PM
> To: Tesla List; daniel_hess-at-VNET.IBM.COM
> Subject: Re: A RSG poser...
>
> Tesla List wrote:
> >
> > From: daniel_hess-at-VNET.IBM.COM[SMTP:daniel_hess-at-VNET.IBM.COM]
> > Sent: Monday, August 18, 1997 3:38 PM
> > To: tesla-at-pupman-dot-com
> > Subject: A RSG poser...
> >
> > All'
> > I began working on my first Tesla coil ten years ago, long before the
> > internet, before the Tesla list, before I knew what I was doing. The
> > only information I could find dealing with construction information
> > were turn-of-the-century reprints, hardly the cutting edge info I've
> > come to enjoy here on Chip's list.
> >
> > I'm running 4 60ma neons in parallel and am using a rotary spark gap
> > because at the time, I believed that was the way to go. It's the kind
> > that
> > probably makes guys like Richard Hull cringe; Ultra high speed rpm,
> > dozens of electrodes producing break rates that would make the late
> > Dr. Sagan swoon. Worst of all, the rotor nearly stops turning under a
> > heavy load!
> >
> > Having learned my lesson, I am in the planning stages of building a
> > high power series static gap and am soliciting any and all input to
> > that end. I realize that there is a limit to the degree of power that
> > such a gap can handle but I would like to avoid reinventing the wheel
> > as much as posible. And almost anything will be an improvement over
> > the turkey of a gap I'm running now.
> >
> > I have had in my posession for some time a rotary vane compressor
> > which
> > although has only a ceiling of 10 psi, its CFM is substantial.
> >
> > My initial plan is to place in line, brass cylinders 2 to 3 inches in
> > diameter, probably 1 to 1.5 inches thick. I'll use at least two
> > cylinders,
> > (for a single gap,) to as many as perhaps 10 or 12 cylinders,
> > depending on
> > the total number of gaps I desire. The cylinders will be supported in
> > a
> > cradle of 15 mm glass rods who in turn will be supported by either a
> > wood
> > or heavy plastic outer cradle. The outer wood/plastic cradle will have
> > the
> > facility to pinch or cinch the glass rods sufficient to hold the
> > cylinders
> > in their place during TC operation but loosen to allow setting the
> > gaps,
> >
> > which will slide end to end within the glass rod cradle.
> >
> > Each cylinder will have a center bore, probably .5 to .75 inch dia.
> > and a
> > second hole, bored laterally from the side of the cylinder into its
> > center bore. This lateral bore will probably be .375 dia.
> >
> > Air pressure from the pump will be directed via a manifold to each of
> > the lateral bores, out the ends of the cylinders and finally, between
> > the
> > gaps themselves. The first and last cylinder's outer ends would be
> > capped,
> > of course. The glass rod cradle will allow a nearly unobstructed
> > escape of
> > air from between the gaps.
> >
> > Comments, flames, suggestions, critiques welcome,
> > Daniel Hess
>
>
> Hi Daniel:
>
> I read your description twice before I was confident I had a pretty
> clear picture of your concept in mind. Some interesting possibilities,
> but I do have a couple of questions. First, my "picture" of your design
> is sort of like slicing up a cucumber and then moving the slices just a
> little bit apart, but keeping them co-axial. This would then be held in
> place by the glass rods you mentioned, or would it? My first suggestion
> would be to analyze whether or not the glass would really maintanin the
> relative position of each cylinder to the next. especially during the
> heating and cooling these disks would see during operation--I don't
> know, just something to consider. The .375" lateral bore you mention
> would possibly have some type of tubing connected to it (a guess) to
> direct the air flow. Cool it would, but is it also going to eventually
> conduct? Again, just something to consider. Many on the list, myself
> included have made vacuum gaps that pretty well accomplish what you are
> outlining within your design. It might be easier to use the vacuum
> cleaner motor system, or for me it was anyway. I'll send you a photo
> direct of the one I built, it might be of interest or provide for
> further ideas. If you have questions on the details, just yell!
>
> Chuck Curran
>
>