With some of the negative ion generators, if they are not potted, you can turn the diode/cap cascade around to make them "positive ion" generators.
Buy two, convert one.
Derek
Sent from my Samsung device
-------- Original message --------
From: Atomic <atomicrox@xxxxxxxxx>
Date: 30/09/2015 17:26 (GMT+00:00)
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Subject: Re: [TCML] Voltage/power dissapation drop across HV DC current
limiting resistors.
As to your first question, yes, I think it'd work.
As to the second question, not sure, I've never tried anything of the sort
with wall-warts. Worst case hypothesis you could plug the wall-warts to
cheap isolation transformers.
On Wed, Sep 30, 2015 at 1:15 PM, msweeney23@xxxxxxxxx <msweeney23@xxxxxxxxx>
wrote:
> Replying to both last replies here. If i could chain two (output isolated)
> rectified flybacks could i not do the same for two isolated negative ion
> generators?
>
> Most wallwart xformers have no ground does that mean i can assume an
> isolated DC output or maybe measure resistance/capacitance of output to
> each AC prong to see? (I know these are not well regulated and the voltage
> may drift).
>
>
>
> Sent from my HTC
>
> ----- Reply message -----
> From: "Carl Noggle" <cn8@xxxxxxx>
> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
> Subject: [TCML] Voltage/power dissapation drop across HV DC current
> limiting resistors.
> Date: Wed, Sep 30, 2015 9:53 AM
>
> A nonrectified flyback would make a good power supply for a hairy
> Cockroft-Walton. If you do hose the diodes, you will lose about 20% of
> the output voltage due to the increased capacitance in the secondary.
> Usually the secondary is divided into four parts with the diodes between
> them in a big series string.
>
> ---Carl
>
>
>
> On 9/30/2015 4:26 AM, Atomic wrote:
> > I'm not sure why you don't want the rectified flybacks. You could just
> > power two of them from (separate) batteries or isolated PSUs and then
> > series the HV output, grounding the center tap. Then you'd have a
> positive
> > and a negative high voltage, low current output. I'd use a 555 oscillator
> > as opposed to a ZVS for to power them for this purpose.
> >
> > On Wed, Sep 30, 2015 at 3:58 AM, Carl Noggle <cn8@xxxxxxx> wrote:
> >
> >> Hey--I forgot to mention that there are four fectifiers in each unit.
> >> Most units have had the fectifiers replaced with rectifiers. Best not
> to do
> >> tech writing too late at noght.
> >>
> >>
> >>
> >>
> >>
> >>
> >> On 9/29/2015 4:53 PM, Doug wrote:
> >>
> >>> Hi Mat; I have 2 flybacks but do not know how to identify weather they
> >>> are old style or newer style, I have had them for a long time.
> >>> Doug
> >>>
> >>> On 9/29/2015 7:01 PM, David Speck wrote:
> >>>
> >>>> Matt,
> >>>>
> >>>> The large majority of potted flyback transformers available these days
> >>>> have integral rectifiers built in, because they were intended for use
> on
> >>>> CRTs. If they have a long lead with a round anode cap on it, it's
> safe to
> >>>> assume that it has a rectifier in it.
> >>>>
> >>>> It's quite hard to find flybacks without rectifiers in them these
> days,
> >>>> unless you can find very old ones from tube TV sets. Those sets used
> >>>> vacuum tube 1B3 rectifier tubes, 'cause effective solid state
> rectifiers
> >>>> weren't available at the time.
> >>>>
> >>>> The old flybacks without rectifiers tend to command high prices when
> you
> >>>> can find them on eBay.
> >>>>
> >>>> Removing the rectifiers from an epoxy potted flyback without
> destroying
> >>>> the hair-fine end of the HV winding is a very difficult proposition.
> >>>>
> >>>> Dave
> >>>>
> >>>> On 9/28/2015 11:19 PM, Matthew Sweeney wrote:
> >>>>
> >>>>> This is correct I am building a 'tandem' VDG using both positive and
> >>>>> negative polarities. I picked up two of those HV negative ION
> generators
> >>>>> just because they were so cheap and I can mess around and see what I
> >>>>> get.
> >>>>>
> >>>>> I though about picking up some flybacks but they don't say anything
> >>>>> about
> >>>>> having a built-in diode and I don't think it's easy to remove them. I
> >>>>> didn't see this deal and already ordered the ion generators, maybe
> I'll
> >>>>> check these out if the ion generators don't work as expected.
> >>>>>
> >>>>> Thanks again for all the info it's been very useful.
> >>>>>
> >>>> _______________________________________________
> >>>> Tesla mailing list
> >>>> Tesla@xxxxxxxxxx
> >>>> http://www.pupman.com/mailman/listinfo/tesla
> >>>>
> >>> _______________________________________________
> >>> Tesla mailing list
> >>> Tesla@xxxxxxxxxx
> >>> http://www.pupman.com/mailman/listinfo/tesla
> >>>
> >>>
> >> _______________________________________________
> >> Tesla mailing list
> >> Tesla@xxxxxxxxxx
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> >>
> > _______________________________________________
> > Tesla mailing list
> > Tesla@xxxxxxxxxx
> > http://www.pupman.com/mailman/listinfo/tesla
> >
>
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