Yeah i built one before but i have a set of these nst sitting here needing
a use. With current limiting i think ill be safe there is no possible
conductive path up to the collecter and i use lots of insulating. Im
specifically interested in how a positive and negative vdg will interact
because i see noticeable differences when i switch the polarity on my
single vdg.
All my rectifying and current limiting components will be potted and i use
HV cable upto 40K just to be sure. And that all goes in a plastic container
covering the entire bottom section including motor, rollers etc.
On Sep 9, 2015 3:42 PM, "ExtremeElectronics.co.uk" <
tesla@xxxxxxxxxxxxxxxxxxxxxxxx> wrote:
> Why not use a fly back, If you look around you can find them with a
> tripler that will give you 30-40KV DC.
> The only down side is that you can't reverse the current
>
> There were some cheap ionizers on ebay a while back, they might be a good
> start too.
> For safety I'd aim for low voltage powered HV devices. I'd be very wary of
> using an NST. In a fault situation or a HV DC discharge from the VDG to the
> NST output, they could create a high current path to whatever the VDG was
> connected to, or arcing to at the time. This could easily be lethal.
>
> Derek
>
>
>
> On 09-Sep-15 6:11 AM, Matthew Sweeney wrote:
>
>> Oh I forgot to mention, any good suggestions for current limiting here?
>> 30ma is far too much for a VDG am I'm sure most of it's going to be wasted
>> anyway. Do i need a good old variac or some other cheaper alternative?
>> Will
>> a light dimmer really work i this situation?
>>
>> Thank you!
>>
>> Matt Sweeney
>>
>>
>> On Wed, Sep 9, 2015 at 12:01 AM, Matthew Sweeney <msweeney23@xxxxxxxxx>
>> wrote:
>>
>> Hello, all does anyone know a good source for HV diodes for rectifying
>>> NST? Specifically up to 15KV at 30ma I would assume I need to account for
>>> RMS so probably around 20KV.
>>>
>>> I think I can get away with just one for half wave and maybe a cap for
>>> smoothing it a bit, but that would need to be a pretty decent cap to deal
>>> with 60HZ at that voltage.
>>>
>>> I'm using this to build a HV DC fed VDG does anyone have any hints or
>>> suggestions? I know I can find both diodes and caps in microwave ovens
>>> but
>>> its a pain to pull them apart and they are commonly too low voltage.
>>>
>>> I have found a few online retailers just wondering if there may be an
>>> alternate source, or anyone have some for sale etc.
>>>
>>> Thanks for any help!
>>>
>>> Matt Sweeney
>>>
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>
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