RE: [TCML] Dr. Resonance inductors

["Lau, Gary" <Gary.Lau@xxxxxx>]

Assuming a single-layer close-wound air core solenoid made from 30AWG magnet wire, a 1H inductor would be huge!  12.33" diameter x 36" long.

I'll preface this by stating that I know very little about Marx generator construction.  But it seems to me that the inductors would need to support only the charging current of the caps by the PSU.  So if you're using a rectified 15/30 NST, 30 mA is the most that the inductors would need to support.  The discharge current of the erected circuit travels only through the gaps and caps - not the inductors.

 The inductance requirement in a Marx generator is less clear, but as the erected pulse duration of a Marx generator is extremely brief, 1H seems WAY larger than necessary.  A little bit of Googling finds typical inductance values between .5-1.0 milliHenry.

Regards, Gary Lau
MA, USA

> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf Of Quarkster
> Sent: Thursday, March 05, 2009 5:14 PM
> To: Tesla Coil Mailing List
> Subject: Re: [TCML] Dr. Resonance inductors
> 
> DC -
> 
> You are not implying that your stock of 1H air-core inductors are stored outdoors
> under a snow bank, are you??
> 
> Would it be possible for one of your employees at Resonance Research to provide
> a photo of one of these very interesting inductors so we all don't have to wait for
> spring to arrive in Wisconsin?
> 
> In the meantime (since these inductors have generated so much interest &
> discussion), could you just share some details of their design & construction?
> 
> Like -
> 1. Air insulated, or oil insulated?
> 2. Approximate physical dimensions?
> 3. RMS current rating?
> 4. Approximate weight?
> 
> There should be nothing "proprietary" about this kind of information, just the top-
> level specifications you would provide to a prospective customer.
> 
> Regards,
> Herr Zapp
> 
> 
> --- On Thu, 3/5/09, DC Cox <resonance@xxxxxxxxxxxx> wrote:
> 
> From: DC Cox <resonance@xxxxxxxxxxxx>
> Subject: Re: [TCML] Dr. Resonance inductors
> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
> Date: Thursday, March 5, 2009, 9:20 AM
> 
> I can't post a photo until I return to WI shop as they are in frozen tundra
> Wisconsin.  I'm in Tucson for the winter.
> 
> I've used them in 3 Marx gens so far, and they work excellent.  Inductors
> and resistors work the same in this circuit.
> 
> DC
> 
> 
> 
> 
> 
> On Wed, Mar 4, 2009 at 7:26 PM, Jim Mora <wavetuner@xxxxxxxxx> wrote:
> 
> > Hi Dc, List,
> >
> >
> >
> > I would very much like to see the construction of a 1H air core inductor.
> I
> > plan to build a Marx Generator in the future. I know there are advantages
> > to
> > using an inductor rather than a resistor in the stages besides prices. Can
> > you post a picture and comment on the construction?
> >
> >
> >
> > Thanks,
> >
> >
> >
> > Jim Mora
> >
> > _______________________________________________
> > Tesla mailing list
> > Tesla@xxxxxxxxxxxxxx
> > http://www.pupman.com/mailman/listinfo/tesla
> >
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