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

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Thu, 16 Aug 2007 19:07:06 -0700 (PDT)
From: Timka <tomasdoc2002@xxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
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 <tesla@xxxxxxxxxx> 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
>
>
>
>
>
>
>
>
> ---------------------------------
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>




       
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