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Re: [TCML] srsg to vari speed rsg
Thanks, I have never run more than 3 Kva through this gap, but immediatly after running I have felt around and observed the following. The stationary electrodes don't even feel warm.
The rotary feels hot, but more than 2" from the tungsten its back to not feeling warm at all. I was a little worried about using aluminium with RF, but so far it seems to be dissipating an overwelming majority of the heat as it spins. So to answer the question, no I am not worried about melting the shaft. Which is nylon.
That's pretty hardcore that your melting g10.
Perhaps you should make some collars for the tungsten to aid in heat removal :)
If I ever get more power through this thing ill be sure to report my findings.
Cheers
John "Jay" Howson IV
Sent from a tiny phone with a tiny keyboard.
----- Reply message -----
From: coils@xxxxxxxxx
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Subject: [TCML] srsg to vari speed rsg
Date: Sun, Jul 28, 2013 10:52 pm
nice gap Jay! looks like you like making things too. Is that a nylon rotor shaft? If so, any concerns with heat on the electrode? I ask because I have managed to
melt .375" G-10 at 8 kva, gonna try G-7 next.
cheers
On Sun 28/07/13 12:07 PM , jhowson4@xxxxxxxxxxx wrote:
> Sort of how I built my ASRG
> propeller style, I can remove electrodes easily, I can replace tungsten
> easily,
> and it uses a minimum amount of tungsten as well, cutting costs. Each
> stationary electrode only has .75" of 1/4.
> the rotary electrodes have 1.5" of 1/4" thoriated tungsten.
> Brass is expensive stuff, but all the brass was procured cheaply on ebay
> via some good deals over the course of a year or so.
>
> Designed to be a dual gap, for use in a split resonator power supply DC
> coil, hence the double sided nature.
> Still needs a few tweaks to be perfect for my tastes, but it does the job
> nicely currently on my test coil.
>
> check it out here
> http://s139.photobucket.com/user/JHowson/library/Tesla%20Coils/Experimental
> %20DC%20Tesla%20Coil%20%20%20code%20name%20TRON/4%20Rotary%20Spark%20Gap?so
> rt=3&page=1[1]
>
> note: the second rotary electrode is missing in the pictures. I have not
> installed it yet.
>
> Thanks,
> John "Jay" Howson IV
>
> "Why thank you, I will be happy to take those electrons off your hands."
>
> ----- Original Message -----
> From: "Scott Bogard"
> To: "Tesla Coil Mailing List"
> Sent: Sunday, July 28, 2013 1:46:10 PM
> Subject: Re: [TCML] srsg to vari speed rsg
>
> I was thinking more a propeller gap with unused stationary electrodes,
> that
> could be reconnected at will. You could always add top capacitance to
> cancel out the extra primary inductance when you cut your cap size,
> assuming you have the power draw to support a larger top load, not sure if
>
> that is applicable to your situation. But at any rate I love the ASRSG, I
> did sync once, and got poor results, switched to ASYNC and things worked
> much better. I know now what I did wrong, poorly sized cap and all, but I
> still won't go back, ASYNC is too easy to build, and smaller caps are
> cheaper, and I love the brightness only high BPS can afford.
>
> Scott Bogard.
>
> On Sun, Jul 28, 2013 at 2:42 AM, wrote:
>
> > Thanks for your thoughts Scott, I am using a 60:1 distribution
> > transformer with an adjustable (gapped) inductive ballast.
> > I am tapped out of primary inductance, so I cant really decrease my cap.
>
> > I have a lot of flexibility though with the ballast. Thinking
> > about the gap you suggest has me boggled, maybe something like Richard
> > Hulls series quench rsg with swithchable stationary electrodes?
> > What appeals to me, is that a vari speed gap can be adjusted on the fly,
>
> > no stopping and fiddling. That is why I made the Freu phase shifter.
> >
> > This has really got me thinking about rotary gaps!
> >
> > cheers
> >
> >
> >
> > On Sat 27/07/13 12:31 PM , Scott Bogard wrote:
> >
> > > One thing you could do, is rig a system to do sync that has multiple
> > > dis-connectable electrodes for 120/240/480 BPS, but again, if you
> aren't
> > > changing the tank cap size, only one range will actually serve your
> > > purposes well... What type of transformer are you using? How is it
> > > ballasted if at all?
> > >
> >
> > _______________________________________________
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> > Tesla@xxxxxxxxxx
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> r/JHowson/library/Tesla%2520Coils/Experimental%2520DC%2520Tesla%2520Coil%25
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