Broadcaster’sClinic

th 2007Tuesday October 9 Shively Labs

Shively Labs

460 ft

FM 200 ft

300 ft

Reference

Height above reference / Tangent of depressionAngle = distance out from antenna200 ft / tan 60 degrees =115 ft

60 deg.13 KW

2 KW

Full wave spaced antennas 60 degrees / No. of bays = angle of 1st null

200 ft / tan 20 degrees =550 ft

13 KW

20 degrees

1/2 WaveHorizontal

Dipoles

Full WaveVerticalDipoles

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Shively Labs

Shively Labs

13 KW

55 deg.

0.13KW

Questions

Pascal’s Triangle 1

1 1 1 2 1

1 3 3 1 1 4 6 4 1

1 5 10 10 5 1 1 6 15 20 15 6 1

1 7 21 35 35 21 7 1 1 8 28 56 70 56 28 8 1

1 9 36 84 126 126 84 36 9 1

Binomial progression for 6 bay antenna

1 5 10 10 5 1 Normalize to 1

0.1 0.5 1.0 1.0 0.5 0.1

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Questions

Directional Antenna

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Final QuestionsShively Labs