Hi Gadgetmall:

On the coil, if you can identify the size of wire used, it can be figured out. Dimensions and hole size. By using the wire chart, by size you can figure out how many feet of wire are in it to make 40 ohms. Can you post that info if known. Thanks.

Thaelin

@thaelin

I know the question is for @gadgetmall. But there is this small

Inductor Design Calculator

by David E. Powell, KA4KNG

That gives the exact lenght of wire needed among other things if you input the desired inductance, the gauge of the wire and the diameter of the coil. An example here:

-------------------------------------------------------------

Desired inductance in microhenries? 120

Gauge or diameter of wire in inches? 26

Diameter of coil form in inches? 2

calculating.

Overall coil diameter...... 2.031884 inches

Average coil diameter...... 2.015942 inches

Depth of coil.............. 1.594223E-02 inches

Length of coil............. .6855158 inches

Length of wire (approx).... 22 feet, 3 inches

Number of layers........... 1

Number of turns............ 43

Number of turns per layer.. 43

Actual inductance.......... 121.426 microhenries

Coil DC resistance......... .9261631 ohms

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So if you know the inductance that should have a coil with 40ohms and the other information this program needs, this program can give you the answer.

The small program is included here as a zipfile.

Jesus