Terry and Dave
Yes slow blo fuses were used.
Oddly enough I've been having some sort of power fluctuations at my house. Full house light flicker once in a while too. Sometime back the power company had to replace the connectors to my main but as of recent I've notice the flicker again. I'm wondering if that has anything to do with it.
I don't have any power correction caps on my nst's maybe it's just time to graduate to something more robust and focus on that power issue :)
I'd really like to find a potential transformer and switch to a rotary spark gap. I'll post pictures of my setup soon.
Vincent
P.S. I used to be on this list about 7 years ago. Just getting back into it now.
> On Nov 25, 2015, at 12:31 AM, Terry <terry@xxxxxxxxxx> wrote:
>
> Vincent,
>
> Sorry I did not see Dave's reply before I replied. I agree with Dave.
>
> Terry Leonard
>
>
>> On 11/24/2015 7:58 PM, David Speck wrote:
>> Vincent,
>>
>> What is the rating of the fuses you are using? 10 amps?
>>
>> Are they slow blow or fast blow fuses?
>>
>> Many old-school name brand variable autotransformers (Variac, Powerstat) can handle double their rated nameplate current ratings for short runs of 30 - 60 seconds without being damaged. Can't say the same for some of the cheap Asian imports, though.
>>
>> A Variac is not the part of the circuit that provides current limiting. That is established by the NSTs themselves.
>>
>> If you want to run 4 NSTs simultaneously, you will need a Variac big enough to provide the all current they require.
>>
>> Adding power factor correction capacitors (PFC) to the transformer input may help manage their current drain.
>>
>> Dave
>>
>>> On 11/24/2015 7:46 PM, Vincent D'Amore wrote:
>>> Hi All
>>>
>>> Recently I've been running my coil controlled by a 10amp variac. I'm running two parallels 12/30 franceformer neons sign transformers and have been running this way for several years but as of late I keep blowing fuses on the variac about every 4th run. I'm not sure if or what has weakened over time. I would like to run my coil with a much larger power supply but that obviously won't go over well with my 10amp variac and I certainly don't want to move forward until I know the weakest point. Any suggestions? Also if I do go with a larger supply I'm thinking of 4 12/30's in parallel but don't know what to do for current limiting. Larger variac? Something else? Thanks for any advice.
>>>
>>> Vincent
>>
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