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DRAKE MN2700 User Manual Page 56
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The End!
6/1/201
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Larry Benko, W
0QE
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Antenna Tuners
1
(Antenna Couplers)
1
What is an Antenna Tuner?
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Basics: Correct or Incorrect?
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6/1/2011 Larry Benko, W0QE 7
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Choices?
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What do you really want/need?
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Matching Network Components
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DIY Coupler
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Types of Tuners
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Tying it all together
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Voltages and Currents
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Irms(max)
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SWR Power Vpk(max)
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“Small” Antenna Examples
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What is the Smith Chart
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Smith Chart Regions
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Sample Design Goals
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Low Pass “L” Network
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Type “A”
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Type “B”
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Low Pass “L” Network Results
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High Pass “L” Network
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Type “C”
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Type “D”
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High Pass “L” Network Results
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Adding a 3
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Component
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Low Pass “Pi” Network
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– Still good matching range
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AntennaTransmitter
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0.2-20uH
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High Pass “Tee” Network
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High Pass “Tee”
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Fixed “L” High Pass
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“Tee” Network
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Both had minimal to moderate
48
Other Network Topologies
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High Pass Differential
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The End!
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Other Topics
57
Does a Full Sized
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Dipole Need
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Matching?
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Dipole Matching
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– #12 wire up 40’
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– No feedline
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– Pink dot = 1.8MHz
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– 50’ of .66VF 50Ω
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– 50’ of 600Ω lossless
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V(Vin1) under I(R1)
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V(Vout2) under I(R2)
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No further
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Smith Chart
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Capacitor
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Inductor
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10MHz = Green
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20MHz = Red
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30MHz = Blue
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2:1 Turns
77
Transformer
77
Surge Impedance Again
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