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Re: [TCML] Voltage/power dissapation drop across HV DC current limiting resistors.

What about two microwave oven transformers with diodes and Voltage doubling capacitors? That would give you plus and minus 4kv.

msweeney23@xxxxxxxxx wrote:

>I wish i could but i need both DC polarities :(
>
>I know an NST is totally overkill for this but outside of using an old fkyback without the built in diode i dont see many options.
>
>Some 20 years ago i built this using a flyback from an old tube TV running on 12DC but it was just a curiosity and i scrapped it when building my first TC (at age 17 with no real knowledge building plate glass capacitors - lucky i didnt kill myself).
>
>If i could find a cheap +/- HV DC generator id be happy. Could i use a single polarity and somehow shift it down so i see a +/- half the voltage?
>
>----- Reply message -----
>From: "David Speck" <Dave@xxxxxxxxxxxxxxxx>
>To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
>Subject: [TCML] Voltage/power dissapation drop across HV DC current limiting resistors.
>Date: Mon, Sep 28, 2015 11:53 AM
>
>Matt,
>
>In today's eMail I received an offer from Goldmine Electronics for a 15 
>KV negative ion generator that runs off 12 VDC for $10.  It's 
>intrinsically current limited, and you can lift it with two fingers 
>instead of two men and a boy like your NST corona generator.
>
>If the polarity is right for your application, then it would be a simple 
>way to go.  Special sale price ends 9/30.  (No connection to seller, but 
>a frequent buyer).
>
>http://www.goldmine-elec-products.com/prodinfo.asp?number=G20855
>
>Dave
>
>On 9/27/2015 9:51 PM, Matthew Sweeney wrote:
>> No that is exactly correct. Another user mentioned that I should be careful
>> using NST for VDG seemingly because there could be short down in the inside
>> of the VDG to the HV brush, allowing potentially lethal currents up to the
>> collector. I've not been able to confirm this exact reason - maybe someone
>> else can chime in on this.
>
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