Re: Double Throw Spark Gap (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Thu, 11 Oct 2007 21:51:34 -0700
From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Double Throw Spark Gap (fwd)

I understand what your after there, but how will that affect the firing 
of the main gap? All in all, your going to find a speed of disc that 
will seem to work well. It's going to balance between the two gaps. I 
don't think "ion trails" are going to play much of a role (the spinning 
RSG has a way of preventing that). But, I think this will actually be a 
positive for you.

There is also the approach of using two sets of rotating electrodes 
(large electrodes = large dwell = increased charge time per dwell, and 
small charging stationary electrodes for increased gap width of those 
electrodes), and then standard main gap electrodes (which would help 
quenching issues with increased bps). You could massively increase the 
number of charging electrodes in this fashion which I would expect to be 
on the outer portion of the disc with the main gap electrodes say 1/2" 
inward edge to edge (because there's more area for electrodes [for 
charging]).

I'm just musing those ideas now that I've got a grasp on what your doing 
and what Steve has done (it's easy being an arm-chair cowboy!). I know 
you've already got it built. So go with that and let us know if it 
reacts. It does open up an interesting approach to switching of charging 
and firing energy.

Take care,
Bart

Tesla list wrote:
> ---------- Forwarded message ----------
> Date: Thu, 11 Oct 2007 22:47:07 -0500
> From: Crispy <crispy@xxxxxxxxxxx>
> To: Tesla list <tesla@xxxxxxxxxx>
> Subject: Re: Double Throw Spark Gap (fwd)
>
> The point is that I WANT the remaining ion trails, and air cooling would
> remove them.  The gap will be firing initially about 5 times a second.
> I want this to happen at a relatively constant voltage.  But, after each
> primary firing, I want about 30 or so other firings to occur at around
> 700Hz at lower voltages.  Air cooling remove the ionized trails that
> would aid in this.
>
> Chris B aka. Crispy
>
> On Thu, 2007-10-11 at 21:22 -0600, Tesla list wrote:
>   
>> ---------- 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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