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Subject: Re: Negative ion generators
Summary: You know, it's really been a long, long time...
Sender: Tut AmongUs
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Date: Sat, 14 Sep 2002 22:39:29 GMT
NNTP-Posting-Date: Sat, 14 Sep 2002 18:39:29 EDT
On Sat, 14 Sep 2002 17:56:18 +1000, "al" Gave
>"Jason Hsu" wrote in message
>> Exactly what voltage and current levels do I need?
>> I would like to build a negative ion generator. From what I
>> understand, a negative ion generator has a very high voltage
>> (thousands) and a very low current. This voltage is fed into a
>> very-high-voltage diode (oriented to pass the negative voltage but
>> reject the positive voltage). The resulting very high negative voltage
>> is fed into a very sharp object (such as a sewing needle), which
>> injects the negative ions into the air inside the chassis. A nearby
>> fan disperses the negative ions into the air in the room outside the
>> Exactly what voltage and current levels do I need? (I also realize
>> that I must simulate this in PSPICE, because the tiny current levels
>> and huge voltage levels aren't in a range that regular multimeters can
>> handle.) I have heard that using too much power will produce ozone,
>> which is poisonous.
>> Jason Hsu, AG4DG
>there used to be a DSE kit.
>Used 240v straight from the wall,
>into a cockcroft walton multiplier circuit.
>Only protection was a couple of resistors to limit the current.
>It claimed to produce around -8000kv
>using 22 stage cockcroft walton multiplier.
>(But unless I'm doing the sums wrong the max output could not
>have been more than around -3.2KV)
First off, you have to use peak voltages.
>Kit got pulled as it was rather dangerous !!
>My first electronics kit(1986 at age 14).
I think that a "caution coffee hot" label would have been good
>With a few modifcations works very well as
>power supply for small rail gun.
ANY HV supply can charge up a bank of caps. What matters is how fast
in some instances.
>Either do a web search or
>have a look from a book called
>Laser, Phaser,ion ray guns and other
>working space age projects by R.Iannini
>(I got given a copy at 14)
>Or any book on the construction and design of particle accelerators
>especially the power supplies.
>If your in the USA
>instead of cockcroft walton generator,
>you would be able to purchase
>some high voltage diodes (10 - 30KV)
Phillips makes them still, as do many others. Many foreign
component makers mfgr them as well these days.
>(sort of components on the resistricted export list)
Which ones? Sure that you aren't off a few decades with that
>and use a modified tv flyback transformer.
It doesn't require a flyback circuit. there are plenty of different
generation schemas available.
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