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.1 .1 .2 .2 .3 .3 .4 .4 .5 .5 .6 .6 .7 .7 .8 .8 .9 .9 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 20 20 30 30 40 40 50 50 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 2 3 4 5 6 7 8 9 10 20 30 40 50 60 70 80 90 100 200 300 400 500 600 700 800 900 1000 GROUND WAVE FIELD STRENGTH VERSUS DISTANCE 1610-1700 kHz COMPUTED FOR 1655 kHz 0.1 0.5 1 1.5 2 3 4 5 6 7 8 10 15 20 30 40 5000 INVERSE DISTANCE 100 mV/m AT 1 km KILOMETERS FROM ANTENNA GRAPH 20-A KILOMETERS FROM ANTENNA MILLIVOLTS/METER

26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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Page 1: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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Page 2: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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Page 3: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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Page 4: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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Page 5: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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Page 6: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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Page 7: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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Page 8: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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Page 9: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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Page 10: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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Page 11: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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Page 12: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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Page 14: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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INVERSE DISTANCE 100 mV/m AT 1 km

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Page 16: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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0.00070.00080.00090.001

0.002

0.003

0.004

0.005

0.006

0.0070.0080.0090.01

0.02

0.03

0.04

0.05

0.06

0.070.080.090.1

0.2

0.3

0.4

0.5

0.6

0.70.80.91

2

3

4

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6

789

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708090

100

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700800900

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GROUND WAVE FIELD STRENGTH

VERSUS

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1040-1100 kHzCOMPUTED FOR 1070 kHz

0.1

0.5

1

1.5

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INVERSE DISTANCE 100 mV/m AT 1 km

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Page 17: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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.1

.2

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GROUND WAVE FIELD STRENGTH

VERSUS

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970-1030 kHzCOMPUTED FOR 1000 kHz

0.1

0.5

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1.5

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INVERSE DISTANCE 100 mV/m AT 1 km

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Page 18: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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0.0006

0.00070.00080.00090.001

0.002

0.003

0.004

0.005

0.006

0.0070.0080.0090.01

0.02

0.03

0.04

0.05

0.06

0.070.080.090.1

0.2

0.3

0.4

0.5

0.6

0.70.80.91

2

3

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789

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708090

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GROUND WAVE FIELD STRENGTH

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970-1030 kHzCOMPUTED FOR 1000 kHz

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1.5

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INVERSE DISTANCE 100 mV/m AT 1 km

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Page 19: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

.1

.1

.2

.2

.3

.3

.4

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GROUND WAVE FIELD STRENGTH

VERSUS

DISTANCE

920-960 kHzCOMPUTED FOR 940 kHz

0.1

0.5

1

1.5

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INVERSE DISTANCE 100 mV/m AT 1 km

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Page 20: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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0.0001

0.0002

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0.0006

0.00070.00080.00090.001

0.002

0.003

0.004

0.005

0.006

0.0070.0080.0090.01

0.02

0.03

0.04

0.05

0.06

0.070.080.090.1

0.2

0.3

0.4

0.5

0.6

0.70.80.91

2

3

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789

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708090

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GROUND WAVE FIELD STRENGTH

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920-960 kHzCOMPUTED FOR 940 kHz

0.1

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1.5

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INVERSE DISTANCE 100 mV/m AT 1 km

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Page 21: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

.1

.1

.2

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.3

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GROUND WAVE FIELD STRENGTH

VERSUS

DISTANCE

870-910 kHzCOMPUTED FOR 890 kHz

0.1

0.5

1

1.5

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INVERSE DISTANCE 100 mV/m AT 1 km

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Page 22: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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0.0001

0.0002

0.0003

0.0004

0.0005

0.0006

0.00070.00080.00090.001

0.002

0.003

0.004

0.005

0.006

0.0070.0080.0090.01

0.02

0.03

0.04

0.05

0.06

0.070.080.090.1

0.2

0.3

0.4

0.5

0.6

0.70.80.91

2

3

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789

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708090

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GROUND WAVE FIELD STRENGTH

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DISTANCE

870-910 kHzCOMPUTED FOR 890 kHz

0.1

0.5

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1.5

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INVERSE DISTANCE 100 mV/m AT 1 km

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Page 23: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

.1

.1

.2

.2

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.3

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.6

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GROUND WAVE FIELD STRENGTH

VERSUS

DISTANCE

820-860 kHzCOMPUTED FOR 840 kHz

0.1

0.5

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1.5

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INVERSE DISTANCE 100 mV/m AT 1 km

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Page 24: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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0.0006

0.00070.00080.00090.001

0.002

0.003

0.004

0.005

0.006

0.0070.0080.0090.01

0.02

0.03

0.04

0.05

0.06

0.070.080.090.1

0.2

0.3

0.4

0.5

0.6

0.70.80.91

2

3

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789

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GROUND WAVE FIELD STRENGTH

VERSUS

DISTANCE

820-860 kHzCOMPUTED FOR 840 kHz

0.1

0.5

1

1.5

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0.1

0.5

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1.5

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INVERSE DISTANCE 100 mV/m AT 1 km

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Page 25: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

.1

.1

.2

.2

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.3

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.5

.6

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.8

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GROUND WAVE FIELD STRENGTH

VERSUS

DISTANCE

770-810 kHzCOMPUTED FOR 790 kHz

0.1

0.5

1

1.5

2

3

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6

7

8

10

15

20

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5000

INVERSE DISTANCE 100 mV/m AT 1 km

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Page 26: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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0.0001

0.0002

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0.0004

0.0005

0.0006

0.00070.00080.00090.001

0.002

0.003

0.004

0.005

0.006

0.0070.0080.0090.01

0.02

0.03

0.04

0.05

0.06

0.070.080.090.1

0.2

0.3

0.4

0.5

0.6

0.70.80.91

2

3

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789

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GROUND WAVE FIELD STRENGTH

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770-810 kHzCOMPUTED FOR 790 kHz

0.1

0.5

1

1.5

2

3

4

5

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8

10

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5000

0.1

0.5

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1.5

2

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10

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5000

INVERSE DISTANCE 100 mV/m AT 1 km

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Page 27: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

.1

.1

.2

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1

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GROUND WAVE FIELD STRENGTH

VERSUS

DISTANCE

720-760 kHzCOMPUTED FOR 740 kHz

0.1

0.5

1

1.5

2

3

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7

8

10

15

20

30

40

5000

INVERSE DISTANCE 100 mV/m AT 1 km

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Page 28: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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50

0.0001

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0.0003

0.0004

0.0005

0.0006

0.00070.00080.00090.001

0.002

0.003

0.004

0.005

0.006

0.0070.0080.0090.01

0.02

0.03

0.04

0.05

0.06

0.070.080.090.1

0.2

0.3

0.4

0.5

0.6

0.70.80.91

2

3

4

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789

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700800900

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GROUND WAVE FIELD STRENGTH

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DISTANCE

720-760 kHzCOMPUTED FOR 740 kHz

0.1

0.5

1

1.5

2

3

4

5

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8

10

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5000

0.1

0.5

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1.5

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5000

INVERSE DISTANCE 100 mV/m AT 1 km

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Page 29: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

.1

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GROUND WAVE FIELD STRENGTH

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690-710 kHzCOMPUTED FOR 700 kHz

0.1

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1.5

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INVERSE DISTANCE 100 mV/m AT 1 km

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Page 30: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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0.0001

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0.0006

0.00070.00080.00090.001

0.002

0.003

0.004

0.005

0.006

0.0070.0080.0090.01

0.02

0.03

0.04

0.05

0.06

0.070.080.090.1

0.2

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0.70.80.91

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GROUND WAVE FIELD STRENGTH

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690-710 kHzCOMPUTED FOR 700 kHz

0.1

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5000

0.1

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INVERSE DISTANCE 100 mV/m AT 1 km

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Page 31: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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Page 32: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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Page 33: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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Page 34: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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Page 35: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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Page 36: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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Page 37: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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Page 38: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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Page 39: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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540-560 kHzCOMPUTED FOR 550 kHz

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Page 40: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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Page 41: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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Page 42: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

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Page 43: 26075292 FCC Ground Wave Field Strength 550 Khz to 1650 Khz Graphs File (1)

AM Groundwave Field Strength Graphs ( 540 to 1700 kHz )

per 47 CFR Sections 73.183 and 73.184

Sections 73.183 and 73.184 refer to AM groundwave field strength Graphs 1 through 20.

However, these graphs are not available in the FCC's rules. Therefore, we have provided

three versions of these graphs, using PDF and PostScript files.

Best quality and smallest file sizes will be obtained from the PDF versions of these

curves. The PDF graph files can be printed on larger paper (e.g., 11" x 17") with

excellent quality. Most users will find this option to be the best choice. For each graph

number (1 through 20), there are two graphs provided. The first graph contains two sets

of curves. The bottom set of curves covers distances between 10 to 5000 km from the

transmitter site, while the top set of curves covers distances between 0.1 and 50 km on an

expanded scale. Electric field strengths in millivolts per meter are listed on the left

margin. The numbers on the individual curves represent ground conductivities, with the

best conductivity (5000) corresponding to seawater (salt water) and the lowest

conductivity (0.1) corresponding to poorly conducting soil. Ground conductivities in the

United States typically fall between 0.1 and 30 milliSiemens per meter (mS/m, formerly

millimhos per meter, where 1 mho = 1 / ohm) (see the map). The "A" series of graphs

(Graph Number dash A) contain an expansion of the top set of curves, covering distances

between 0.1 and 50 km from the transmitter site.