ExtraClassSylalbus2009jan-AD7FO

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Rev 2.02 E3B02 The approximate maximum range for signals using transequatorial propagation is 2500 miles. E3B03 Afternoon or early evening is the best time of day for transequatorial propagation. E3B04 Long-path propagation is probably occurring if an HF beam antenna must be pointed in a direction 180 degrees away from a station to in order to receive the strongest signals. E3B05 The 160 to 10 meter amateur bands typically support long-path propagation. E3B06 The 20 meter amateur band most frequently provides long-path propagation. E3B07 Receipt of a signal by more than one path could account for hearing an echo on the received signal of a distant station. E3B08 Gray-line propagation is probably occurring if radio signals travel along the terminator between daylight and darkness. E3B09 Gray-line propagation is most prevalent at sunrise and sunset. E3B10 At twilight, solar absorption drops greatly, while atmospheric ionization is not weakened enough to reduce the MUF allowing gray-line propagation to occur E3B11 Contacts up to 8,000 to 10,000 miles on three or four HF bands are possible during gray-line propagation. E3C Propagation and technique, part 3: Auroral propagation; selective fading; radio-path horizon; take-off angle over flat or sloping terrain; earth effects on propagation; less common propagation modes Jack Tiley <strong>AD7FO</strong> Page 26 3/15/2009
Rev 2.02 E3C01 Auroral activity causes radio communication of CW signals have a fluttery tone. E3C02 The cause of auroral activity is the emission of charged particles from the sun. E3C03 Auroral activity in the ionosphere occurs at E-region height. E3C04 The CW emission mode is best for auroral propagation. E3C05 Selective fading is caused by phase differences in the received signal caused by different paths. E3C06 VHF/UHF radio-path horizon distance exceeds the geometric horizon by approximately 15% of the distance. E3C07 The radiation pattern of a 3-element, horizontally polarized beam antenna will vary with height above ground. The main lobe takeoff angle will decrease with increasing height. E3C08 The name of the high-angle wave in HF propagation that travels for some distance within the F2 region is the Pedersen ray. E3C09 Tropospheric ducting is usually responsible for propagating VHF signals over 500 miles. E3C10 The performance of a horizontally polarized antenna mounted on the side of a hill when compared with the same antenna mounted on flat ground will have a main lobe takeoff angle that decreases in the downhill direction. E3C11 From within the contiguous 48 states, an antenna should be pointed approximately north to take maximum advantage of auroral propagation. E3C12 As the frequency of a signal is increased, its ground wave propagation decreases. E3C13 Most ground-wave propagation has a Vertical polarization. E3C14 Because VHF and UHF radio waves may be bent, the radio-path horizon distance can exceed the geometric horizon (by about 15%). Jack Tiley <strong>AD7FO</strong> Page 27 3/15/2009
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
Page 7 and 8: Rev 2.02 ELEMENT 4 - EXTRA CLASS QU
Page 9 and 10: Rev 2.02 E1A09 (Band Plan Chart) Th
Page 11 and 12: Rev 2.02 E1B13 (FCC Rules) Communic
Page 13 and 14: Rev 2.02 E1D08 (FCC Rules) The 2 me
Page 15 and 16: Rev 2.02 E1E20 (FCC Rules) You must
Page 17 and 18: 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: Rev 2.02 SUBELEMENT E3 -- RADIO WAV
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 and 70: Rev 2.02 E7C01 In a low-pass filter
Page 71 and 72: Rev 2.02 E7D02 One characteristic o
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
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Rev 2.02 E7G17 The typical output i
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Rev 2.02 E7H19 A phase-locked loop
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Rev 2.02 E8A06 The approximate rati
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Rev 2.02 E8B13 In time division mul
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Rev 2.02 E8D07 An electromagnetic w
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Rev 2.02 E9A10 Antenna bandwidth is
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Rev 2.02 E9B10 The “Method of Mom
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Rev 2.02 E9C09 The elevation angle
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Rev 2.02 E9D09 An advantage of usin
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Rev 2.02 E9E08 An SWR greater than
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Rev 2.02 E9F11 A 1/8-wavelength tra
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Rev 2.02 E9H05 The main drawback of
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Rev 2.02 SUBELEMENT E0 -- SAFETY [1
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Rev 2.02 Jack Tiley AD7FO Page 103
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Rev 2.02 Capacitors in series C= __
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Rev 2.02 Impedance of complex serie
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Rev 2.02 Calculating Component valu
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Rev 2.02 AC Voltage Calculations Th
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Rev 2.02 Jack Tiley AD7FO Page 113
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