Re: Vacuum jar rotary spark gap / thyratron (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Fri, 17 Aug 2007 04:22:59 +0000
From: David Rieben <drieben@xxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Cc: drieben@xxxxxxxxxxx
Subject: Re: Vacuum jar rotary spark gap / thyratron (fwd)

Tim,

I hate to shoot your idea down in flames but that sounds like a
very expensive, bulky and dangerous setup. You would have to 
worry about the x-rays ionizing more than just the SG space, too,
like your flesh, for instance! It sounds about as practical as using an
elephant to transport a bale of hay - one straw at a time! Anyway, 
Like Gary said, something is amiss if your SG is making more noise 
than your output streamers. It would actually be more practical to 
sound proof your garage/shop area than what you're proposing.

David Rieben

-------------- Original message -------------- 
From: "Tesla list" <tesla@xxxxxxxxxx> 

> 
> ---------- Forwarded message ---------- 
> Date: Thu, 16 Aug 2007 19:07:06 -0700 (PDT) 
> From: Timka 
> To: Tesla list 
> Subject: Re: Vacuum jar rotary spark gap / thyratron (fwd) 
> 
> Good idea, unfortunately it's the neighbors that complain since I tend to 
> experiment after work around 11pm. 
> 
> Another option is to buy cheap spark gaps enclosed in a glass tube, but 
> they are not variable and therefore it is impossible to adjust them unless 
> using a very strong ionization source shining between gap.. hmmm 
> 
> Here is an idea.. how about using a fixed enclosed glass spark gap with 
> external x-ray lamp shining on the spark gap electrodes as ionization 
> source? Of course it would be bulky but.... should be silent. Is it 
> possible to adjust output of X-ray tubes? Obvious the amount of ionization 
> can roughly adjust the rate of "breaks". 
> 
> 
> Tesla list wrote: 
> ---------- Forwarded message ---------- 
> Date: Thu, 16 Aug 2007 15:20:33 -0500 
> From: Drake Schutt 
> To: Tesla list 
> Subject: Re: Vacuum jar rotary spark gap / thyratron (fwd) 
> 
> Uhm nice "headset" type ear protection would save your ears and be a lot 
> cheaper and easier than some crazy spark gap. 
> 
> drake schutt 
> 
> On 8/16/07, Tesla list wrote: 
> > 
> > 
> > ---------- Forwarded message ---------- 
> > Date: Thu, 16 Aug 2007 12:15:16 -0700 (PDT) 
> > From: Timka 
> > To: tesla@xxxxxxxxxx 
> > Subject: Vacuum jar rotary spark gap / thyratron 
> > 
> > 
> > Anyone tried before to make a vacuum jar rotary spark gap? 
> > 
> > I have a nice deep vacuum pump and I'm thinking to make a rotary spark 
> > gap using 10,000 rpm hard drive motor with attached tungsten electrodes. 
> > Everything will be assembled and placed under a thick and large plastic jar 
> > from which I would pump all the air away. 
> > 
> > Since that motor is DC I can change RPM with voltage and it also has a 
> > nice Hall sensor build in, which I can use to monitor RPM with external 
> > meter. 
> > 
> > I'm doing it because I'm tired of spark gap noise, so I think that if I 
> > create above mentioned enclosure it would help to ease stress to my ears. 
> > 
> > Any suggestions and constructive criticism would be extremely 
> > appreciated. 
> > 
> > Also, 
> > 
> > As a part of tube exercise I also decided to give it a try with 
> > thyratrons instead of spark gap. It seems that thyratron tubes are 
> > relatively easy to set up as spark gaps using proper drivers. I have a nice 
> > thyratron driver (NanoFast 204-7 Trigger 3.5KV). Does anyone know if there 
> > any limitations on tubes to be used? 
> > 
> > Again, suggestions and constructive criticism would be extremely 
> > appreciated. 
> > 
> > Many thanks, 
> > 
> > 
> > Tim 
> > 
> > 
> > 
> > 
> > 
> > 
> > Tesla list wrote: 
> > ---------- Forwarded message ---------- 
> > Date: Thu, 16 Aug 2007 17:00:06 +0100 
> > From: Chris Swinson 
> > 
> > To: Tesla list 
> > Subject: safe capacitor discharge times ? 
> > 
> > Hi all, 
> > 
> > Was thinking today, Electrolytic capacitor and current ratings. Of course 
> > if 
> > you wack a screw driver across it, will discharge faster than capacitor 
> > rating (10amps is about as good as I have seen, maybe 1amp for smaller 
> > values), capacitor will be damaged in anycase trying to give a large high 
> > peak amp pulse, could heat up or even explode... 
> > 
> > so onto my question, if I have a pulse of 100amps, but the rise time is 
> > only 
> > 1amp per uS, instead of a 100amp rated capacitor, could a 1amp one be used 
> > instead ? It would in effect draw 1amp for 100uS for example but has 
> > passed 
> > 100amps in total. 
> > 
> > Cheers, 
> > Chris 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > --------------------------------- 
> > Be a better Globetrotter. Get better travel answers from someone who 
> > knows. 
> > Yahoo! Answers - Check it out. 
> > 
> > 
> > 
> 
> 
> 
> 
> 
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