Serious ‘XM (aka W2XM) presents Exam-Prep Jepperdee: General-Class Edition Procedures & Practices Rules and Regulations Components and Circuits Radio Signals & Equipment 100 100 100 100 200 200 200 200 300 300 300 300 400 400 400 400 500 500 500 500 SFJ ANTENNAS & PROPAGATION ELECTRICAL & VOCABULARY XMSN LINES RF SAFETY 100 100 100 100 200 200 200 200 300 300 300 300 400 400 400 400 500 500 500 500 FJ G8B10 What does the number 31 represent in PSK31? The approximate transmitted symbol rate back Which mode is most commonly used for voice on the 17and 12-meter bands? G2A04 Upper sideband back Under normal conditions, what is the minimum frequency separation between SSB signals? G2B05 Approx. 3 kHz back G2C07 When sending CW, what does a “C” mean when added to the RST report? Chirpy or unstable signal back What segment of the 20-meter band is most often used for data transmissions? G2E04 (B) 14.070 - 14.100 MHz back G1B03 For what purpose might a radio amateur operate a beacon station? Observation of propagation and reception back When’s it permissible to communicate with stations in countries outside areas administered by FCC? G2D05 When contact is with hams in countries whose administrations do not object back G1E01 What would disqualify a 3rd party from participating in stating a message over amateur radio? The third party’s amateur license had ever been revoked back G1A04 What amateur band permits only channelized ham operation? 60 meters back G1B06 When is an amateur station permitted to transmit secret codes? To control a space station back How many watts of electrical power are used if 400 VDC is supplied to an 800-ohm load? G5B03 200 watts back G5B06 What is the PEP output from a xmtr if an o’scope measures 200 volts p-p across a 50-ohm dummy? 100 watts back G5A02 What is reactance? Opposition to the flow of alternating current caused by capacitance or inductance back G6C02 What is meant by the phrase MMIC? Monolithic Microwave Integrated Circuit back G7B03 What is the output of a 2-input AND gate when both inputs are high? high back G8B11 How does FEC allow the receiver to correct errors in received data packets? By transmitting redundant information with the data back G8A12 What signal(s) would be found at the output of a properly adjusted balanced modulator? Both upper and lower sidebands back G4A03 What is normally meant by operating a transceiver in "split" mode? The transceiver is set to different transmit and receive frequencies back In an SSB xmtr, in what kind of circuit is the output of the balanced modulator processed before going to the mixer? G7C01 Filter back G7B12 Of choices A, B, AB, and C, which amplifier class is the most efficient? Class C back What is the purpose of a "corona ball" on a HF mobile antenna? G4E02 To reduce high voltage discharge from the tip of the antenna back What is the approximate length of the driven element of a Yagi antenna? G9C02 1/2 wavelength back G9C16 How does the gain of a 2-element deltaloop compare to the gain of a two-el quad antenna? About the same back G9D10 Describe a Beverage antenna. A very long and low directional receiving antenna back What device is often used to match the xmtr output to other than 50 ohms? G4A06 Antenna coupler back G2D06 How is a directional antenna pointed when making a “long-path” contact with another station? 180 degrees from its short-path heading back What happens to sigs. with frequencies between LUF and MUF when they go into the ionosphere? G3B05 They are bent back to the Earth back G3A10 What causes HF propagation conditions to vary periodically in a 28day cycle? The Sun’s rotation on its axis back What usually happens to signals with frequencies below the Lowest Usable Frequency? G3B06 They are completely absorbed by the ionosphere back What allows a signal to be detected at a distance too far for ground wave but too near for normal skywave propagation? G3C09 Scatter back What is the min. wire size that may be safely used for a circuit that draws up to 20 A continuously? G0B02 AWG number 12 back G0B09 Why should soldered joints not be used with the wires that connect the base of a tower to a system of ground rods? A soldered joint will be destroyed by the heat of a lightning strike back What type of instrument can be used to accurately measure an RF field? G0A09 A calibrated fieldstrength meter with a calibrated antenna back G0B08 What should be done by any person preparing to climb a tower that supports electrical devices? Make sure all circuits that supply power to the tower are locked out and tagged back G0A01 How does RF energy affect human body tissue? It heats body tissue back isotropic antenna An antenna that radiates and/or receives equally in all directions back The basic unit of inductance Henry back local oscillator an oscillator that generates one of the input signals to a mixer back Solar cycle the 10.7-year periodic variation in solar activity back A resistor with a precise temperature coeffient that allows it to be used as a temperature sensor thermistor back DAILY DOUBLE Your wager? Here’s the question… DAILY DOUBLE Your wager? Here’s the question… The 3 connections on a quarter-inch stereo phone plug are called “tip,” “ring,” and what? sleeve To game 2 board Besides inductance, what electrical quantity exists in a coil that is self-resonant? capacitance Next slide We hope Examprep Jepperdee was helpful! Comments? Suggestions?