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ANTENTOP- 01- 2007  # 009

Lightning Tank Calculator

 

 

 

Very often an amateur need calculate parameters of resonator tank (see Figure 1). Certainly, there are lots programs that can do the calculations. However very quick and with acceptable tolerance amateur can do it using Table 1. The table gives value for L (in μHn) multiple to C (in pF).

   

 

Example 1: You need resonator tank for 10 MHz. Value LxC is 253.3.

 

So, you may use,  L= 2.53 μHn and C= 100 pF.

2.53X100= 253.

 

Or, you may use L= 5 μHn and C= 56.6-pF.

5X56.6= 253.

 

Subtract from the capacitance 10- 15 pF-  it is selfcapacitance L plus capacitance parts to ground. So, real C should be  238 pF(253- 15) or 41 pF ( 56- 15).

 

Example 2: You need resonator tank for 14 MHz. Value LxC is 129.2.

 

So, you may use,  L= 1.0-μHn and C= 129 pF.

1.0X129= 129.

 

Or, you may use L= 2 μHn and C= 64.6-pF.

2X64.6= 129,2.

 

Subtract from the capacitance 10- 15 pF-  it is selfcapacitance L plus capacitance parts to ground. So, real C should be  114 pF(129-15) or 49 pF ( 64- 15).

 

Table 1

LC Value

F, MHz

LC

F, MHz

LC

F, MHz

LC

F, MHz

LC

F, MHz

LC

0.5

101320

1.8

7818

6

703.6

15

112.6

24

43.98

0.6

70361

2.0

6333

7

516.9

16

98.95

25

40.53

0.7

51694

2.5

4053

8

395.8

17

87.65

26

37.47

0.8

39578

3.0

2814

9

312.7

18

78.18

27

34.75

0.9

31272

3.5

2068

10

253.3

19

70.17

28

32.31

1.0

25330

4.0

1583

11

209.3

20

63.33

29

30.12

1.2

17590

4.5

1251

12

175.9

21

57.44

30

28.14

1.4

12923

5.0

1013

13

149.9

22

52.33

31

26.36

1.6

9695

5.5

837.4

14

129.2

23

47.88

32

24.74

 

 

 

Credit Line:

 

Igor Grigorov.

Antenny. Nastroyka I Soglasovanie.

(In Russian)

 

Publishing House RadioSoft,

 

Moscow, 2002

 

http://www.antentop.org/

Page 97

 

97

 

 

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Last Updated:

August 2, 2016 23:42

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