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LX2SM Conversion + data

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I got  question via e-mail about this table and how to use it in real world, so I give you a small explanation.

You will find below a table including the most used iron powder toroidal cores with the sizes, AL value, and frequency range of use. All value have to be taken with +-5%

The formula to calculate the the inductance is : uH=(AL*Turns2)/1000

I.e : if you use a T200-2 and makes 20 turns you will get (with the 12 AL value from the T200-2 found in table) an inductance of 4.8 uH.

If you add a 105 pF capacitor in parallele you will got a nice 7.1 MHz resonant circuit for that frequency. This could be then the secondary winding of an impedance transformer. Add a 3 turns winding as primary then about 21.12 meters of wire and you just built your first half wave endfed 40 meters antenna (see schematic below and visit AA5TB page for more info, more on that later in the rigs and ants page

AA5TB

Tore

AL

OD

Ø ext

ID

Ø int

Ht

Ht

e

A

V

Core color

Freq min

Freq max

Permeability

Toroid

nH/N2

in

mm

in

mm

in

mm

cm

cm2

cm3

Couleur

MHZ

MHZ

Perméabilité

T12-0

0.3

0.125

3.2

0.0625

1.6

0.05

1.3

0.74

0.01

0.007

Tan / Tan

100

300

1

T16-0

0.3

0.16

4.1

0.078

2

0.06

1.5

0.95

0.016

0.015

Tan / Tan

100

300

1

T20-0

0.35

0.2

5.1

0.088

2.2

0.07

1.8

1.15

0.025

0.029

Tan / Tan

100

300

1

T25-0

0.45

0.255

6.5

0.12

3

0.096

2.4

1.5

0.042

0.063

Tan / Tan

100

300

1

T30-0

0.6

0.307

7.8

0.151

3.8

0.128

3.3

1.83

0.065

0.119

Tan / Tan

100

300

1

T37-0

0.49

0.375

9.5

0.205

5.2

0.128

3.3

2.32

0.07

0.162

Tan / Tan

100

300

1

T44-0

0.65

0.44

11.2

0.229

5.8

0.159

4

2.67

0.107

0.286

Tan / Tan

100

300

1

T50-0

0.64

0.5

12.7

0.303

7.7

0.19

4.8

3.03

0.121

0.367

Tan / Tan

100

300

1

T68-0

0.75

0.69

17.5

0.37

9.4

0.19

4.8

4.24

0.196

0.831

Tan / Tan

100

300

1

T80-0

0.85

0.795

20.2

0.495

12.6

0.25

6.4

5.15

0.242

1.246

Tan / Tan

100

300

1

T94-0

1.06

0.942

23.9

0.56

14.2

0.312

7.9

6

0.385

2.31

Tan / Tan

100

300

1

T106-0

1.9

1.06

26.9

0.57

14.5

0.437

11.1

6.5

0.69

4.485

Tan / Tan

100

300

1

T130-0

1.5

1.3

33

0.78

19.8

0.437

11.1

8.28

0.698

5.78

Tan / Tan

100

300

1

Tore

AL

OD

Ø ext

ID

Ø int

Ht

Ht

e

A

V

Core color

Freq min

Freq max

Permeability

Toroid

nH/N2

in

mm

in

mm

in

mm

cm

cm2

cm3

Couleur

MHZ

MHZ

Perméabilité

T12-1

4.8

0.125

3.2

0.0625

1.6

0.05

1.3

0.74

0.01

0.007

Blue / Clear

0.5

5

20

T16-1

4.4

0.16

4.1

0.078

2

0.06

1.5

0.95

0.016

0.015

Blue / Clear

0.5

5

20

T20-1

5.2

0.2

5.1

0.088

2.2

0.07

1.8

1.15

0.025

0.029

Blue / Clear

0.5

5

20

T25-1

7

0.255

6.5

0.12

3

0.096

2.4

1.5

0.042

0.063

Blue / Clear

0.5

5

20

T30-1

8.5

0.307

7.8

0.151

3.8

0.128

3.3

1.83

0.065

0.119

Blue / Clear

0.5

5

20

T37-1

8

0.375

9.5

0.205

5.2

0.128

3.3

2.32

0.07

0.162

Blue / Clear

0.5

5

20

T44-1

10.5

0.44

11.2

0.229

5.8

0.159

4

2.67

0.107

0.286

Blue / Clear

0.5

5

20

T50-1

10

0.5

12.7

0.303

7.7

0.19

4.8

3.03

0.121

0.367

Blue / Clear

0.5

5

20

T68-1

11.5

0.69

17.5

0.37

9.4

0.19

4.8

4.24

0.196

0.831

Blue / Clear

0.5

5

20

T80-1

11.5

0.795

20.2

0.495

12.6

0.25

6.4

5.15

0.242

1.246

Blue / Clear

0.5

5

20

T94-1

16

0.942

23.9

0.56

14.2

0.312

7.9

6

0.385

2.31

Blue / Clear

0.5

5

20

T106-1

32.5

1.06

26.9

0.57

14.5

0.437

11.1

6.5

0.69

4.485

Blue / Clear

0.5

5

20

T130-1

20

1.3

33

0.78

19.8

0.437

11.1

8.28

0.698

5.78

Blue / Clear

0.5

5

20

T157-1

32

1.57

39.9

0,95

24.1

0.57

14.5

10.1

1.06

10.7

Blue / Clear

0.5

5

20

T184-1

50

1.84

46.7

0.95

24.1

0.71

18

11.2

1.88

21

Blue / Clear

0.5

5

20

T200-1

25.0

2

50.8

1.25

31.8

0.55

14

13

1.27

16.4

Blue / Clear

0.5

5

20

Tore

AL

OD

Ø ext

ID

Ø int

Ht

Ht

e

A

V

Core color

Freq min

Freq max

Permeability

Toroid

nH/N2

in

mm

in

mm

in

mm

cm

cm2

cm3

Couleur

MHZ

MHZ

Perméabilité

T12-2

2

0.125

3.2

0.0625

1.6

0.05

1.3

0.74

0.01

0.007

Red / Clear

2

30

10

T16-2

2,2

0.16

4.1

0.078

2

0.06

1.5

0.95

0.016

0.015

Red / Clear

2

30

10

T20-2

2,5

0.2

5.1

0.088

2.2

0.07

1.8

1.15

0.025

0.029

Red / Clear

2

30

10

T25-2

3,4

0.255

6.5

0.12

3

0.096

2.4

1.5

0.042

0.063

Red / Clear

2

30

10

T30-2

4,3

0.307

7.8

0.151

3.8

0.128

3.3

1.83

0.065

0.119

Red / Clear

2

30

10

T37-2

4

0.375

9.5

0.205

5.2

0.128

3.3

2.32

0.07

0.162

Red / Clear

2

30

10

T44-2

5,2

0.44

11.2

0.229

5.8

0.159

4

2.67

0.107

0.286

Red / Clear

2

30

10

T50-2

4,9

0.5

12.7

0.303

7.7

0.19

4.8

3.03

0.121

0.367

Red / Clear

2

30

10

T68-2

5,7

0.69

17.5

0.37

9.4

0.19

4.8

4.24

0.196

0.831

Red / Clear

2

30

10

T80-2

5,5

0.795

20.2

0.495

12.6

0.25

6.4

5.15

0.242

1.246

Red / Clear

2

30

10

T94-2

8,4

0.942

23.9

0.56

14.2

0.312

7.9

6

0.385

2.31

Red / Clear

2

30

10

T106-2

13,5

1.06

26.9

0,57

14.5

0.437

11.1

6.5

0.69

4.485

Red / Clear

2

30

10

T130-2

11

1.3

33

0.78

19.8

0.437

11.1

8.28

0.698

5.78

Red / Clear

2

30

10

T157-2

14

1.57

39.9

0,95

24.1

0.57

14.5

10.1

1.06

10.7

Red / Clear

2

30

10

T175-2

15

1.75

44.5

1.07

27.2

0.65

16.5

11.2

1.34

15

Red / Clear

2

30

10

T184-2

24

1.84

46.7

0.95

24.1

0.71

18

11.2

1.88

21

Red / Clear

2

30

10

T200-2

12.0

2

50.8

1.25

31.8

0.55

14

13

1.27

16.4

Red / Clear

2

30

10

T200A-2

21.8

2

50,8

1.4

35.6

1

25.4

13

2.24

29.05

Red / Clear

2

30

10

T200-2B

21.8

2

50.8

1.25

31.8

1

25.4

13

2.32

30

Red / Clear

2

30

10

T225-2

12

2.25

57.2

1.485

35.6

0.55

14

14.6

1.42

20.7

Red / Clear

2

30

10

T225A-2

21.5

2.25

57.2

1.25

31.8

1

25.4

14.6

2.73

39.75

Red / Clear

2

30

10

T225-2B

21.5

2.25

57.2

1.4

35.6

1

25.4

14.6

2.59

37.8

Red / Clear

2

30

10

T300-2

11.4

3.04

77.2

1.925

49

0.5

12.7

19.8

1.68

33.4

Red / Clear

2

30

10

T300A-2

22.8

3.04

77.2

1.93

49

1

25.4

19.8

3.58

70.99

Red / Clear

2

30

10

T300-2D

22.8

3.04

77.2

1.93

49

1

25.4

19.8

3.78

67

Red / Clear

2

30

10

T400-2

18

4

102

2,5

63.6

0.65

16.5

25.0

3.46

86.4

Red / Clear

2

30

10

T400A-2

36

4

102

2.25

57.2

1.3

33

25

7.43

185.25

Red / Clear

2

30

10

T400-2D

36

4

102

2.25

57.2

1.3

33

25.0

6.85

171

Red / Clear

2

30

10

T520-2

20

5.2

132

3.08

78.2

0.8

20.3

33.1

5.24

173

Red / Clear

2

30

10

Tore

AL

OD

Ø ext

ID

Ø int

Ht

Ht

e

A

V

Core color

Freq min

Freq max

Permeability

Toroid

nH/N2

in

mm

in

mm

in

mm

cm

cm2

cm3

Couleur

MHZ

MHZ

Perméabilité

T12-3

6

0.125

3.2

0.0625

1.6

0.05

1.3

0.74

0.01

0.007

Gray / Clear

0.05

0.5

35

T16-3

6.1

0.16

4.1

0.078

2

0.06

1.5

0.95

0.016

0.015

Gray / Clear

0.05

0.5

35

T20-3

7.6

0.2

5.1

0.088

2.2

0.07

1.8

1.15

0.025

0.029

Gray / Clear

0.05

0.5

35

T25-3

10

0.255

6.5

0.12

3

0.096

2.4

1.5

0.042

0.063

Gray / Clear

0.05

0.5

35

T30-3

14

0.307

7.8

0.151

3.8

0.128

3.3

1.83

0.065

0.119

Gray / Clear

0.05

0.5

35

T37-3

12

0.375

9.5

0.205

5.2

0.128

3.3

2.32

0.07

0.162

Gray / Clear

0.05

0.5

35

T44-3

18

0.44

11.2

0.229

5.8

0.159

4

2.67

0.107

0.286

Gray / Clear

0.05

0.5

35

T50-3

17.5

0.5

12.7

0.303

7.7

0.19

4.8

3.03

0.121

0.367

Gray / Clear

0.05

0.5

35

T68-3

19.5

0.69

17.5

0.37

9.4

0.19

4.8

4.24

0.196

0.831

Gray / Clear

0.05

0.5

35

T80-3

18

0.795

20.2

0.495

12.6

0.25

6.4

5.15

0.242

1.246

Gray / Clear

0.05

0.5

35

T94-3

24.8

0.942

23.9

0.56

14.2

0.312

7.9

6

0.385

2.31

Gray / Clear

0.05

0.5

35

T106-3

45

1.06

26.9

0,57

14.5

0.437

11.1

6.5

0.69

4.485

Gray / Clear

0.05

0.5

35

T130-3

35

1.3

33

0.78

19.8

0.437

11.1

8.28

0.698

5.78

Gray / Clear

0.05

0.5

35

T157-3

42

1.57

39.9

0,95

24.1

0.57

14.5

10.1

1.06

10.7

Gray / Clear

0.05

0.5

35

T184-3

72

1.84

46.7

0.95

24.1

0.71

18

11.2

1.88

21

Gray / Clear

0.05

0.5

35

T200-3

42.5

2

50.8

1.25

31.8

0.55

14

13

1.27

16.4

Gray / Clear

0.05

0.5

35

T225-3

42.5

2.25

57.2

1.4

35.6

0.55

14

14.6

1.42

20.7

Gray / Clear

0.05

0.5

35

Tore

AL

OD

Ø ext

ID

Ø int

Ht

Ht

e

A

V

Core color

Freq min

Freq max

Permeability

Toroid

nH/N2

in

mm

in

mm

in

mm

cm

cm2

cm3

Couleur

MHZ

MHZ

Perméabilité

T12-6

1.7

0.125

3.2

0.0625

1.6

0.05

1.3

0.74

0.01

0.007

Yellow / clear

10

50

8

T16-6

1.9

0.16

4.1

0.078

2

0.06

1.5

0.95

0.016

0.015

Yellow / clear

10

50

8

T20-6

2.2

0.2

5.1

0.088

2.2

0.07

1.8

1.15

0.025

0.029

Yellow / clear

10

50

8

T25-6

2.7

0.255

6.5

0.12

3

0.096

2.4

1.5

0.042

0.063

Yellow / clear

10

50

8

T30-6

3.6

0.307

7.8

0.151

3.8

0.128

3.3

1.83

0.065

0.119

Yellow / clear

10

50

8

T37-6

3

0.375

9.5

0.205

5.2

0.128

3.3

2.32

0.07

0.162

Yellow / clear

10

50

8

T44-6

4.2

0.44

11.2

0.229

5.8

0.159

4

2.67

0.107

0.286

Yellow / clear

10

50

8

T50-6

4.6

0.5

12.7

0.303

7.7

0.19

4.8

3.03

0.121

0.367

Yellow / clear

10

50

8

T68-6

4.7

0.69

17.5

0.37

9.4

0.19

4.8

4.24

0.196

0.831

Yellow / clear

10

50

8

T80-6

4.5

0.795

20.2

0.495

12.6

0.25

6.4

5.15

0.242

1.246

Yellow / clear

10

50

8

T94-6

7

0.942

23.9

0.56

14.2

0.312

7.9

6

0.385

2.31

Yellow / clear

10

50

8

T106-6

11.6

1.06

26.9

0,57

14.5

0.437

11.1

6.5

0.69

4.485

Yellow / clear

10

50

8

T130-6

9.6

1.3

33

0.78

19.8

0.437

11.1

8.28

0.698

5.78

Yellow / clear

10

50

8

T157-6

11.5

1.57

39.9

0,95

24.1

0.57

14.5

10.1

1.06

10.7

Yellow / clear

10

50

8

T175-6

12.5

1.75

44.5

1.07

27.2

0.65

16.5

11.2

1.34

15

Yellow / clear

10

50

8

T184-6

19.5

1.84

46.7

0.95

24.1

0.71

18

11.2

1.88

21

Yellow / clear

10

50

8

T200-6

10

2

50.8

1.25

31.8

0.55

14

13

1.27

16.4

Yellow / clear

10

50

8

T225-6

10

2.25

57.2

1.4

35.6

0.55

14

14.6

1.42

20.7

Yellow / clear

10

50

8

Tore

AL

OD

Ø ext

ID

Ø int

Ht

Ht

e

A

V

Core color

Freq min

Freq max

Permeability

Toroid

nH/N2

in

mm

in

mm

in

mm

cm

cm2

cm3

Couleur

MHZ

MHZ

Perméabilité

T25-7

2.9

0.255

6.5

0.12

3

0.096

2.4

1.5

0.042

0.063

White / Clear

3

35

9

T37-7

3.2

0.375

9.5

0.205

5.2

0.128

3.3

2.32

0.07

0.162

White / Clear

3

35

9

T50-7

4.3

0.5

12.7

0.303

7.7

0.19

4.8

3.03

0.121

0.367

White / Clear

3

35

9

T68-7

5.2

0.69

17.5

0.37

9.4

0.19

4.8

4.24

0.196

0.831

White / Clear

3

35

9

T130-7

10.3

1.3

33

0.78

19.8

0.437

11.1

8.28

0.698

5.78

White / Clear

3

35

9

T200-7

10.5

2

50.8

1.25

31.8

0.55

14

13

1.27

16.4

White / Clear

3

35

9

Tore

AL

OD

Ø ext

ID

Ø int

Ht

Ht

e

A

V

Core color

Freq min

Freq max

Permeability

Toroid

nH/N2

in

mm

in

mm

in

mm

cm

cm2

cm3

Couleur

MHZ

MHZ

Perméabilité

T12-15

5

0.125

3.2

0.0625

1.6

0.05

1.3

0.74

0.01

0.007

Red / White

0.1

2

25

T16-15

5.5

0.16

4.1

0.078

2

0.06

1.5

0.95

0.016

0.015

Red / White

0.1

2

25

T20-15

6.5

0.2

5.1

0.088

2.2

0.07

1.8

1.15

0.025

0.029

Red / White

0.1

2

25

T25-15

8.5

0.255

6.5

0.12

3

0.096

2.4

1.5

0.042

0.063

Red / White

0.1

2

25

T30-15

9.3

0.307

7.8

0.151

3.8

0.128

3.3

e

0.065

0.119

Red / White

0.1

2

25

T37-15

9

0.375

9.5

0.205

5.2

0.128

3.3

2.32

0.07

0.162

Red / White

0.1

2

25

T44-15

16

0.44

11.2

0.229

5.8

0.159

4

2.67

0.107

0.286

Red / White

0.1

2

25

T50-15

13.5

0.5

12.7

0.303

7.7

0.19

4.8

3.03

0.121

0.367

Red / White

0.1

2

25

T68-15

18

0.69

17.5

0.37

9.4

0.19

4.8

4.24

0.196

0.831

Red / White

0.1

2

25

T80-15

17

0.795

20.2

0.495

12.6

0.25

6.4

5.15

0.242

1.246

Red / White

0.1

2

25

T94-15

20

0.942

23.9

0.56

14.2

0.312

7.9

6

0.385

2.31

Red / White

0.1

2

25

T106-15

34

1.06

26.9

0,57

14.5

0.437

11.1

6.5

0.69

4.485

Red / White

0.1

2

25

T130-15

34.5

1.3

33

0.78

19.8

0.437

11.1

8.28

0.698

5.78

Red / White

0.1

2

25

T157-15

36

1.57

39.9

0,95

24.1

0.57

14.5

10.1

1.06

10.7

Red / White

0.1

2

25

Tore

AL

OD

Ø ext

ID

Ø int

Ht

Ht

e

A

V

Core color

Freq min

Freq max

Permeability

Toroid

nH/N2

in

mm

in

mm

in

mm

cm

cm2

cm3

Couleur

MHZ

MHZ

Perméabilité

T12-17

0.75

0.125

3.2

0.0625

1.6

0.05

1.3

0.74

0.01

0.007

Blue / Yellow

20

200

4

T16-17

0.8

0.16

4.1

0.078

2

0.06

1.5

0.95

0.016

0.015

Blue / Yellow

20

200

4

T20-17

1

0.2

5.1

0.088

2.2

0.07

1.8

1.15

0.025

0.029

Blue / Yellow

20

200

4

T25-17

1.2

0.255

6.5

0.12

3

0.096

2.4

1.5

0.042

0.063

Blue / Yellow

20

200

4

T30-17

1.6

0.307

7.8

0.151

3.8

0.128

3.3

e

0.065

0.119

Blue / Yellow

20

200

4

T37-17

1.5

0.375

9.5

0.205

5.2

0.128

3.3

2.32

0.07

0.162

Blue / Yellow

20

200

4

T44-17

1.85

0.44

11.2

0.229

5.8

0.159

4

2.67

0.107

0.286

Blue / Yellow

20

200

4

T50-17

1.8

0.5

12.7

0.303

7.7

0.19

4.8

3.03

0.121

0.367

Blue / Yellow

20

200

4

T68-17

2.1

0.69

17.5

0.37

9.4

0.19

4.8

4.24

0.196

0.831

Blue / Yellow

20

200

4

T80-17

3.2

0.795

20.2

0.495

12.6

0.25

6.4

5.15

0.242

1.246

Blue / Yellow

20

200

4

T94-17

3.2

0.942

23.9

0.56

14.2

0.312

7.9

6

0.385

2.31

Blue / Yellow

20

200

4

T106-17

5.1

1.06

26.9

0,57

14.5

0.437

11.1

6.5

0.69

4.485

Blue / Yellow

20

200

4

T130-17

4

1.3

33

0.78

19.8

0.437

11.1

8.28

0.698

5.78

Blue / Yellow

20

200

4

T157-17

5.3

1.57

39.9

0,95

24.1

0.57

14.5

10.1

1.06

10.7

Blue / Yellow

20

200

4

T184-17

8.7

1.84

46.7

0.95

24.1

0.71

18

11.2

1.88

21

Blue / Yellow

20

200

4

Tore

AL

OD

Ø ext

ID

Ø int

Ht

Ht

e

A

V

Core color

Freq min

Freq max

Permeability

Toroid

nH/N2

in

mm

in

mm

in

mm

cm

cm2

cm3

Couleur

MHZ

MHZ

Perméabilité

Iron powder core power rating and other usefull info are here follow the link to download (about 2492 Ko)

Coaxial cable properties’

 

Impédance

 

 

Atténuation for 100m (dBs)

 

 

Type

Ohm

V. F.

pF/m

30MHz

100MHz

400MHz

OD

Dielectric

RG-5/U

52,5

0,66

93,5

6,2

8,8

19,4

8,432

PE

RG-5B/U

50

0,66

96,78

6,2

7,9

19,4

8,432

PE

RG-6A/U

75

0,66

67

6,2

8,9

19,4

8,432

PE

RG-7/U

95

 

41

 

7,8

17

 

 

RG-8/U

52

0,66

97

4,7

6,25

13,4

10,3

PE

RG-8/U

50

0,8

83,3

 

 

 

10,3

PEF

RG-8A/U

50

0,66

100

4,7

6,2

13,4

10,3

PE

RG-8A/U

52

0,66

97

 

5,75

13,5

 

 

RG-8 XX

50

0,8

 

7,04

 

 

6,15

PEF

RG-9/U

51

0,66

98,4

4,9

6,5

16,4

10,79

PE

RG-9A/U

51

0,66

98,4

4,9

7,6

16,4

10,79

PE

RG-9B/U

50

0,66

100

4,9

7,6

16,4

10,79

PE

RG-10A/U

50

0,66

100

4,3

6,2

13,4

12,06

PE

RG-11/U

75

0,66

67,2

5,3

7,5

15,8

10,3

PE

RG-11/U

75

0,8

55,4

 

 

 

10,3

PEF

RG-11A/U

75

0,66

67,5

4

7,5

15,7

10,3

PE

RG-12/U

75

0,66

67,5

 

 

 

12

PE

RG-12A/U

75

0,66

67,5

5,2

7,54

15,7

12

PE

RG-13/U

74

0,66

67,5

5,3

7,6

15,8

 

 

RG-13A/U

75

0,66

67,5

5,2

7,5

15,7

10,8

PE

RG-14A/U

50

0,66

100

3,3

4,6

10,2

13,84

PE

RG-16/U

52