Re: [TCML] Sphere Topload Coil

[resonance@xxxxxxxxxxxx]

Sounds like you have a great fan there.  Is there any indicationof the
fan's mfgr and part number?

I will be experimenting with some different fans this summer and certainly
would like to include yours.

Thanks,

DC

> Hi DC,
>
> I couldn't tell if you were asking about my gap or Davids. If the gap I
> spoke of:
>
> The pvc is epoxied to the squirrel cage fan. Only one inlet on one side
> of the pvc. PVC is about 4.5" diameter. 1.25" diameter copper tubes
> epoxied to the inside pvc. .050" between electrodes. The fan sucks the
> outside air into the pvc and out the fan through a 3.5" chamber on the
> outlet of the fan. Not sure of the CFM as it's not written anywhere. But
> it is high and similar to shop vac velocity I guess. It's much higher
> than muffin fans including the big 8" muffin fan I have which runs on
> 240Vac.
>
> As you can tell, I'm not a "FAN" of muffin fans. They are just lousy for
> spark gaps over 1kw or so. Much depends on the gap itself of course.
> Once I got good performance with this particular fan, I then played with
> various pipe diameters including the solid brass stock I once told you
> about. The large copper tubing was very superior. I'll never use small
> 1/2" copper pipe again nor solid stock. I've seen the difference. Gaps
> have to handle the power given. I've ran this gap at 3.6 kva for
> extended periods without degradation of the spark length. I don't know
> what it's max power handling is however. I'm happy with it.
>
> Take care,
> Bart
>
>
>
> resonance@xxxxxxxxxxxx wrote:
>> Is it enclosed in a PVC tube, or open air?
>>
>> What size CFM fan are you using?
>>
>> Dr. Resonance
>>
>>
>>
>>
>>> what size pipes ya using on yours ?    mine are 1" dia, 'bout 4" long
>>> with two good sized muff fans for cooling,
>>>
>>>      it will stay stable for long runs at 3kva ,.....I used 2" dia in
>>> the
>>> past,...although they stay cooler, the smaller dia seems to perform
>>> better.......
>>>
>>>
>>>> Date: Thu, 21 Feb 2008 19:08:38 -0800> From: bartb@xxxxxxxxxxxxxxxx>
>>>> To:
>>>> tesla@xxxxxxxxxx> Subject: Re: [TCML] Sphere Topload Coil> CC: > > Hi
>>>> David,> > I'm musing here as I haven't built a pressurized gap.> > I
>>>> personally love my high cfm vacuum RQ style cylinder gap using large >
>>>> segments, which I can run near 3 kva with just fine.> > Take care,>
>>>> Bart>
>>>>
>>> _______
>
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Dr. Resonance

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