Q values

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Barton B. Anderson" <bartb@xxxxxxxxxxxxxxxx>

Hi All,

Due to my recent Max Inductance post, I mentioned finding an error in 
Javatc for low h/d coils regarding Q and Rac outputs. Due to this 
finding and correction, I've updated a graph that I've had at the 
website which spells out measured Q values for numerous coils vs. 
Javatc's prediction of Q. I thought I should update the graph so 
everyone can see that Javatc's Q prediction is certainly in the 
ballpark. Q is a very difficult measurement to get right. The 
measurement itself is easy, but resolution is often the problem and 
can really throw off the actual attainable Q measurement. What error 
is found is very likely the measurement more than the calculated 
value. It's just that type of situation with Q.

Anyway, here's the graph showing how Javatc ranks with precise 
measured Q values.

http://www.classictesla.com/sim/Rac_Q_Chart.gif

Take care,
Bart