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

[Harvey Norris <harvich@xxxxxxxxx>]

--- On Fri, 6/19/09, jimlux <jimlux@xxxxxxxxxxxxx> wrote:

> From: jimlux <jimlux@xxxxxxxxxxxxx>
> Subject: Re: [TCML] Source for 1H air-core inductors
> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
> Date: Friday, June 19, 2009, 11:58 AM
> 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..
> 
> 3000 turns * 18" average turn length = 4500 feet
> 40 ga is 1000 ohms/1000ft  (roughly.. 10ga is 1
> ohm/1000ft, 40ga is 1/1000 the area)
> 
> So 4500 ohms DC resistance, or something around there.
> 
> 40 AWG is about 30kft/lb, so we're looking at less than
> 1/4lb of wire.
> 
> What about if you just buy a 1/4 lb spool of 40AWG wire.
> 
> 
> Sticking with the idea of 3000 turns in the size of a
> standard wire spool... one might look at a pound of AWG
> 30.  Resistance would be about 450 ohms.
> 
> Half pound spools, 1600ft of AWG30 Beld-Sol are $45 from
> Mouser.
> 
> ACtually, though the spools might be too small, which
> reduces the inductance.
> 
> A one pound spool of PolyThermaleze might be closer to what
> you want.
I wonder if any of these manufacturers can supply an inside lead? Every spool of 23 gauge that I obtained had none, thus had to be rewound for use as an inductor.
HDN
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