Study items for general class

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RMS voltage, given Peak voltage | Vrms = Vp * 0.707 | |

Peak Voltage, given RMS | Vp = Vrms / .707 = Vrms * 1.414 | |

Vp-p, given RMS | Vp-p = Vrms * 2.828 | |

AC Power, given Vrms and current | P = Vrms * I | |

AC Power, given Vrms and resistence | P = Vrms^2 / R | |

AC Power, given current and resistence | P = I^2 * R | |

DC Power, given voltage and current | P = V * I | |

DC Power, given voltage and resistence | P = V^2 / R | |

DC Power, given current and resistence | P = I^2 * R | |

Gain in DB, given P2 and P1 | A(db) = 10 x log10(P2/P1) | |

Power percentage, given db | P2/P1 = 10^(db/10) | |

Total Resistence, resistors in parallel | R = (R1 + R2 ...) | |

Total Resistence, resistors in series | R = 1(1/R1 + 1/R2 ...) | |

Total inductance, inductors in series | L = (L1 + L2 ...) | |

Total Inductance, inductors in parallel | L = 1(1/L1 + 1/L2 ...) | |

Total capacitance, capacitors in series | C = 1(1/C1 + 1/C2 ...) | |

Total Capacitance, capacitors in parallel | C = (C1 + C2 ...) | |

Turns ratio, given output and input inpedence | Sqrt( output impedence / input impedence) | |

Length in feet of quarter wave antenna | Length = 234 / MHz | |

F2 hop distance | 2500 miles | |

E hop distance | 1,200 | |

160m | 1.8-2.0 MHz | |

80m | 3.5-4.0 MHz (3.8+ G) | |

60m | 5.3 MHz (5 channels) | |

40m | 7.0-7.3 MHz (7.175+ G) | |

30m | 10.1-10.15 MHz (200w PEP) | |

20m | 14.0-14.35 MHz (14.225+ G) | |

17m | 18.068-18.168 MHz | |

15m | 21.0-21.450 MHz (21.275+ G) | |

12m | 24.890-24.990 MHz | |

10m | 28.0-29.7 MHz | |

6m | 50.0-54.0 MHz | |

2m | 144.0-148.0 MHz | |

1.25m | 222.0-225.0 MHz | |

70cm | 420.0-450.0 MHz | |

General full privs | 160, 60, 30, 17, 12, 10, 6 | |

Baud limit 300 | 12 and below | |

Baud limit 1200 | 10m | |

Baud limit 19.6k | 6 and 2 | |

Baud limit 56k | 222 MHz + |

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