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Re: [TCML] High voltage diodes



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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