Try this Dan:

CM Inductor Q Calculation
CE
GH 1 500 10 200 100 100 100 100 2.5
GW 2 5 100 0 200 0 0 200 2.5
GW 3 10 0 0 200 0 0 0 2.5
GW 4 5 0 0 0 100 0 0 2.5
GS 0 0 0.001000
GE 0
EX 0 3 5 00 1 0
FR 0 9 0 0 3.7 0.025
LD 5 1 1 520 5.7001E7
RP 0 181 1 1000 -90 90 1.00000 1.00000
EN

I am sure you need to fine tune the structure, since I just guessed at the
wire diameter at 5 mm for #4. Also not sure what you mean by "Pitch". This
coils shows a Q of 2600 at 3.8 MHz. Don't know how 4Nec2 will handle it,
but you could end up with 520 tags!

73,

Frank


"Frank" wrote in message
news:8OPHf.9448$W31.154@edtnps90...
"GH" should do it Dan. I also did a Mathcad analysis based on Terman. If
you have Mathcad I can send it to you. One thing I should do is compare
NEC with Terman.

Frank


"dansawyeror" wrote in message
. ..
I am using Reg's programs to calculate the Q and R of 'large'. These coils
are in the range of 220 mm in diameter and long.

There seems to be a difference in the coil simulation between Vertload
and c_poise. In particular c_poise seems more sensitive to coil wire
diameter then vertload. Vertical load will create a coil with low R and a
relativily small wire diameter and pitch, 2 mm and .2 pitch (it does not
predict Q). C_poise requires a large wire diameter, 12 mm and a high
pitch, .8 to achieve similar R values.

Is there a reason for this? Am I missing something?

Is there a way to simulate Q and R for these coils with nec?? How would
one create an nec representation for a coil?

Thanks - Dan - kb0qil