What gage wire should I be using?

Jan 31, 2004 2 Replies
A

I'm trying to build a small 50 Ohm antenna with the following specs:



5 turns of wire with a 1.5cm diameter in a spiral coil, Coil resistance should be .6 Ohms, Inductance is .777uH. How would I go about calculating the gage wire needed?
Vote
Twitter Facebook LinkedIn
D
1.5 cm * 3.14159 * 5 turns = 23.56 cm / 2.54 cm = 9.27 inchs / 12 inchs = .773 ft / .9534 ft / ohm = .810 ohm using 40 awg.

Could this page help?

formatting link

Vote
Twitter Facebook LinkedIn
E

Get the length of the wire 1.5 * pi * 5 and use a wire table to find a gage that yields ~.6 ohms at that length. See

formatting link
The length of the wire will depend upon spacing between the turns, which you did not specify. You also did not specify frequency. Still, with the numbers given, #39 AWG will give about .6 ohms. I did not check my calcs against the .777uH figure.

Vote
Twitter Facebook LinkedIn

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required