Re: Double Throw Spark Gap (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Thu, 11 Oct 2007 20:47:39 -0700
From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Double Throw Spark Gap (fwd)

Exactly right Chris, your first bang is your highest voltage arc across 
the gap. As the electrodes heat up, the arc voltage will decrease, but 
hopefully they will balance out on the high side. Thus, air cooling 
becomes important. RSG's have a natural air cooling mechanism. Static 
gaps require external cooling to achieve the same. But yes, any 
remaining ionized particles within the static gap will decrease the 
dielectric withholding voltage, and thus, reigniting the gap will happen 
at a lower voltage. Air cool the static gap to resolve this issue (I 
know, it's another motor on your watt limit). Just run a power cord from 
your neighboring dorm room!

Take care,
Bart

Tesla list wrote:
> ---------- Forwarded message ----------
> Date: Thu, 11 Oct 2007 18:06:42 -0500
> From: Crispy <crispy@xxxxxxxxxxx>
> To: Tesla list <tesla@xxxxxxxxxx>
> Subject: Re: Double Throw Spark Gap (fwd)
>
> My concern with a design based on the heating of electrodes is that,
> when first turned on, the electrodes start off cool.  Therefore, the gap
> will initially fire at a higher voltage than after it heats up.  Do
> remnant ionized trails in static gaps have anything to do with increased
> propensity to fire, or am I completely lost?
>
> Thanks,
> Chris B aka. Crispy
>
> On Thu, 2007-10-11 at 16:31 -0600, Tesla list wrote:
>   
>> ---------- Forwarded message ----------
>> Date: Thu, 11 Oct 2007 13:50:24 -0500
>> From: David Dean <deano@xxxxxxxxxxxxxxxx>
>> To: Tesla list <tesla@xxxxxxxxxx>
>> Subject: Re: Double Throw Spark Gap (fwd)
>>
>> On Wednesday 10 October 2007 08:46:06 pm you wrote:
>>
>>     
>>> On yet another unrelated note,
>>> Does anyone have any feedback on my initial proposition of seriesing a
>>> static gap in the charging circuit to pulse power? 
>>>       
>> Hi
>>
>> Perhaps a less than optimum static gap design would be the order of the day.
>>
>> I see a static gap with one electrode sharp and pointed and the other 
>> electrode flat.  A T.I.G. electrode and a tungsten disk. You need to observe 
>> polarity as some rectification will occur.
>>
>> The point heats up lowering the firing voltage of the static gap allowing the 
>> ARSG to drain the storage cap further.  When the gap goes out it stars to 
>> cool raising the firing voltage while the storage cap is recharged. 
>>
>> The trick would be to get just the right angle and degree of sharpness so the 
>> heating cooling cycle will just track the storage cap charge cycle.
>>
>> Just a thought.
>>
>> later
>> deano
>>
>>
>>
>>     
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