RE: [TCML] Source for 1H air-core inductors

[Jim Lux <jimlux@xxxxxxxxxxxxx>]

Probably don't need 1H for that application, though.

Tape wound air core inductors for crossovers might be a good choice there, perhaps overkill.

And, in a pulsed app, core design can be quite different. A simple bar might be ok. Yes you get losses, but that might be made up by fewer turns, so less R.  Fruengel's book would be a good place to look for design hints

-----Original Message-----
From: "Lau, Gary" <Gary.Lau@xxxxxx>
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Sent: 6/19/09 09:54
Subject: RE: [TCML] Source for 1H air-core inductors

Yeah, but if such an inductor is used between stages of a Marx generator, you either want a single layer, or some very non-trivial insulation between orderly layers, to stand off the voltage spikes.  Current is probably not too high.

Per WinTesla, a 1-layer 3" fist-diameter coil of 40AWG would need to be 53" long to achieve 1H.

Regards, Gary Lau

> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf Of jimlux
> Sent: Friday, June 19, 2009 11:58 AM
> To: Tesla Coil Mailing List
> Subject: Re: [TCML] Source for 1H air-core inductors
> 
> Ed Phillips wrote:
> > Resistance?
> >
> > Current handling capability?
> >
> > Ed
> 
> Ballparking here using Wheeler's equation
> 6" diameter, 6" long, 3000 turns is just under 1 H..

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