Measurement of air coil 7.1mm diam, Wire = 0.5mm Cu

n=turns

Pad space

Inductance

info

1

0.1 "

60nH

-

2

-

73nH

compact

2

0.1 "

75nH

-

2

0.2 "

72nH

-

3

≈ 0.1 "

150nH

compact

3

0.2 "

112nH

-

3

0.3 "

111nH

-

4

≈ 0.1 "

199nH

compact

4

0.2 "

155nH

-

4

0.3 "

128nH

-

4

0.4 "

127nH

-

5

≈ 0.1 "

275nH

compact

5

0.2 "

205nH

-

5

0.3 "

197nH

-

5

0.4 "

174nH

-

6

≈ 0.15 "

328nH

compact

6

2 "

277nH

-

6

3 "

223nH

-

6

4 "

210nH

-

7

≈ 0.2 "

433nH

compact

7

3 "

311nH

-

7

4 "

289nH

-

7

5 "

242nH

-

8

≈ 0.2 "

508nH

compact

8

3 "

399nH

-

8

4 "

358nH

-

8

5 "

326nH

-

9

≈ 0.2 "

590nH

compact

9

3 "

512nH

-

9

4 "

442nH

-

9

5 "

390nH

-

10

≈ 0.25 "

672nH

compact

10

3 "

603nH

-

10

4 "

514nH

-

10

5 "

461nH

-

10

6 "

409nH

-