Re: New Inductance Formula

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Barton B. Anderson by way of Terry Fritz <twftesla-at-qwest-dot-net>" <tesla123-at-pacbell-dot-net>

Hi Dave, 

Well, I tried your formula but am getting a value of 37837. If this is mH, then
it's way off, but maybe I've made a boo boo. Therefore, here's my flat coil
measurements. Do the your math and let us know what you come up with. My L
meter is the Wavetek 27XT. 

"All" values "measured": 
298 turns 
0.0225 total wire diameter (.0201 bare) 
13.9775 OD 
0.625 ID 
13.8 ohms 
11.9 mH 

For what it's worth, Acmi predicted 12.0mH and JavaTC predicted 11.8mH
(Wheeler). From my inductance measurements and from my perspective, I am unable
to ascertain why there's an issue. 

Take care, 
Bart 
  
  

Tesla list wrote: 
>
> Original poster: "David Thomson by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <dave-at-volantis-dot-org> 
>
> Terry, 
>
> It appears my formula already accounts for zero impedance during resonance. 
> The measurements we take with our LCR meters appear to measure the inductance
>
> of the coil plus the inductive reactance.  So my formula should be showing
> the 
> actual inductance of the coil in a working, resonant circuit.  What do you 
> think? 
>
> Dave