ExtraClassSylalbus2009jan-AD7FO

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Rev 2.02 E7C07 An audio notch filter would be used to attenuate an interfering carrier signal while receiving an SSB transmission. E7C08 An adaptive filter type of digital signal processing audio filter might be used to remove unwanted noise from a received SSB signal. E7C09 A Hilbert-transform filter type of digital signal processing filter might be used in generating an SSB signal. E7C10 A cavity filter would be the best choice for use in a 2-meter repeater duplexer. E7C11 Pi Filter is the common name for a filter network which is equivalent to two L networks back-to-back. E7C12 A Pi-L network, which is a network consisting of two series inductors and two shunt capacitors is used when matching a vacuum-tube final amplifier to a 50-ohm unbalanced output. E7C13 One advantage of a Pi matching network over an L matching network is that the Q of Pi networks can be varied depending on the component values chosen. E7C14 Digital modes are most affected by non-linear phase response in a receiver IF filter. E7D Power supplies and voltage regulators E7D01 One characteristic of a linear electronic voltage regulator is the conduction of a control element is varied to maintain a constant output voltage. Jack Tiley <strong>AD7FO</strong> Page 70 3/15/2009
Rev 2.02 E7D02 One characteristic of a switching electronic voltage regulator is the control device’s duty cycle is controlled to produce a constant average output voltage. E7D03 A Zener diode is typically used as a stable reference voltage in a linear voltage regulator. E7D04 A series regulator type of linear regulator makes the most efficient use of the primary power source. E7D05 A shunt regulator type of linear voltage regulator places a constant load on the unregulated voltage source. C1 4000 Figure E7- 3 +25 Q1 +12 R1 C2 D1 4000 C3 0.01 R2 Figure E7-2 E7D06 The purpose of Q1 in the circuit shown in Figure E7-3 is to increases the current-handling capability of the regulator. E7D07 The purpose of C2 in the circuit shown in Figure E7-3 is to bypass hum around D1. E7D08 The circuit shown in Figure E7-3 is a linear voltage regulator. E7D09 The purpose of C1 in the circuit shown in Figure E7-3 is to filter the supply Power voltage. E7D10 The purpose of C3 in the circuit shown in Figure E7-3 is to prevent self-oscillation. E7D11 The purpose of R1 in the circuit shown in Figure E7-3 is to It supply current to D1. E7D12 The purpose of R2 in the circuit shown in Figure E7-3 is to provide a constant minimum load for Q1. E7D13 The purpose of D1 in the circuit shown in Figure E7-3 is to provide a voltage reference. E7D14 One purpose of a "bleeder" resistor in a conventional (unregulated) power supply is to improve output voltage regulation. E7D15 The purpose of a "step-start" circuit in a high-voltage power supply is to allow the filter capacitors to charge gradually. This consists of inserting a resistor in the primary side of the transformer to limit the charge current on the capacitors at initial turn on. The series resistor is switched out after a few seconds of operation. Jack Tiley <strong>AD7FO</strong> Page 71 3/15/2009 R C2 C1
Page 1 and 2:
Rev 2.02 Preparing for the Extra cl
Page 3 and 4:
Rev 2.02 Guide to using this syllab
Page 5 and 6:
Rev 2.02 SUBELEMENT E4 -- AMATEUR R
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Rev 2.02 ELEMENT 4 - EXTRA CLASS QU
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Rev 2.02 E1A09 (Band Plan Chart) Th
Page 11 and 12:
Rev 2.02 E1B13 (FCC Rules) Communic
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Rev 2.02 E1D08 (FCC Rules) The 2 me
Page 15 and 16:
Rev 2.02 E1E20 (FCC Rules) You must
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Rev 2.02 SUBELEMENT E2 - OPERATING
Page 19 and 20: Rev 2.02 E2A13 Geosynchronous satel
Page 21 and 22: Rev 2.02 E2B17 Immunity from fading
Page 23 and 24: Rev 2.02 E2D02 The definition of
Page 25 and 26: Rev 2.02 SUBELEMENT E3 -- RADIO WAV
Page 27 and 28: Rev 2.02 E3C01 Auroral activity cau
Page 29 and 30: Rev 2.02 E4A06 A spectrum analyzer
Page 31 and 32: Rev 2.02 E4B09 High impedance input
Page 33 and 34: Rev 2.02 E4C06 If t he thermal nois
Page 35 and 36: Rev 2.02 E4D11 Third-order intermod
Page 37 and 38: Rev 2.02 SUBELEMENT E5 -- ELECTRICA
Page 39 and 40: Rev 2.02 E5B Time constants and pha
Page 41 and 42: Rev 2.02 Example 2: To find the ang
Page 43 and 44: Rev 2.02 j 50 -j 25 E5B12 The phase
Page 45 and 46: Rev 2.02 j 600 -j300 E5C04 In polar
Page 47 and 48: Rev 2.02 Parallel circuit solutions
Page 49 and 50: Rev 2.02 R=300 Ω XL= (2 π FL) or
Page 51 and 52: Rev 2.02 Power Factor represents th
Page 53 and 54: Rev 2.02 SUBELEMENT E6 -- CIRCUIT C
Page 55 and 56: Rev 2.02 Field-effect transistors e
Page 57 and 58: Rev 2.02 E6B12 Junction diodes are
Page 59 and 60: Rev 2.02 E6D02 Cathode ray tube (CR
Page 61 and 62: Rev 2.02 E6E04 The technique used t
Page 63 and 64: Rev 2.02 E6F07 Cadmium sulfide will
Page 65 and 66: Rev 2.02 E7A07 An AND gate produces
Page 67 and 68: Rev 2.02 When a Class C rather than
Page 69: Rev 2.02 E7C01 In a low-pass filter
Page 73 and 74: Rev 2.02 E7E05 A pre-emphasis netwo
Page 75 and 76: Rev 2.02 E7F08 One purpose of a mar
Page 77 and 78: Rev 2.02 E7G17 The typical output i
Page 79 and 80: Rev 2.02 E7H19 A phase-locked loop
Page 81 and 82: Rev 2.02 E8A06 The approximate rati
Page 83 and 84: Rev 2.02 E8B13 In time division mul
Page 85 and 86: Rev 2.02 E8D07 An electromagnetic w
Page 87 and 88: Rev 2.02 E9A10 Antenna bandwidth is
Page 89 and 90: Rev 2.02 E9B10 The “Method of Mom
Page 91 and 92: Rev 2.02 E9C09 The elevation angle
Page 93 and 94: Rev 2.02 E9D09 An advantage of usin
Page 95 and 96: Rev 2.02 E9E08 An SWR greater than
Page 97 and 98: Rev 2.02 E9F11 A 1/8-wavelength tra
Page 99 and 100: Rev 2.02 E9H05 The main drawback of
Page 101 and 102: Rev 2.02 SUBELEMENT E0 -- SAFETY [1
Page 103 and 104: Rev 2.02 Jack Tiley AD7FO Page 103
Page 105 and 106: Rev 2.02 Capacitors in series C= __
Page 107 and 108: Rev 2.02 Impedance of complex serie
Page 109 and 110: Rev 2.02 Calculating Component valu
Page 111 and 112: Rev 2.02 AC Voltage Calculations Th
Page 113: Rev 2.02 Jack Tiley AD7FO Page 113
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