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</html>";s:4:"text";s:7244:"Which type of detector circuit is used for demodulating SSB signals? When constructing a Beverage antenna, which of the following factors should be included in the design to achieve good performance at the desired frequency? What is a common method of generating an SSB signal using digital signal processing? What limitations may the FCC place on an amateur station if its signal causes interference to domestic broadcast reception, assuming that the receivers involved are of good engineering design? What type of bias is required for an LED to emit light? What is one advantage of using ASCII code for data communications? This study guide is written to help you understand the radio theory with a practical slant, not just teach the answers, although the scope is limited to question pool topics due to the limited workshop time. How can unwanted ringing and audio instability be prevented in an op-amp RC audio filter circuit? What type of circuit is shown in Figure E7-2? What happens to the radiation pattern of an unterminated long wire antenna as the wire length is increased? How is power supplied to the most common type of MMIC? Which of the following amateur stations may transmit one-way communications? What is the primary effect of extremely short rise or fall time on a CW signal? What could cause local AM broadcast band signals to combine to generate spurious signals in the MF or HF bands? What is meant by the term "op-amp input offset voltage"? What absolute voltage gain can be expected from the circuit in Figure E7-3 when R1 is 3300 ohms and RF is 47 kilohms? The 2020-2024 Extra-class pool incorporates significant changes compared to the current 2016-2020 question pool, which expires on June 30. Resources listed under Ham Radio Exam Question category belongs to Exams main collection, and get reviewed and rated by amateur radio operators. What is the maximum bandwidth for a data emission on 60 meters? Which of the following represents capacitive reactance in rectangular notation? In the antenna radiation pattern shown in Figure E9-1, what is the front-to-side ratio? What is one of the potential hazards of operating in the amateur radio microwave bands? What is the function of a decade counter? What is meant by circularly polarized electromagnetic waves? Which insulating material commonly used as a thermal conductor for some types of electronic devices is extremely toxic if broken or crushed and the particles are accidentally inhaled? When may an automatically controlled station originate third party communications? Ham Radio Licensure Question Pool - Extra Class Terms in this set (738) E0A01 What, if any, are the differences between the radiation produced by radioactive materials and the electromagnetic energy radiated by an antenna? On what portion of the 630 meter band are phone emissions permitted? What coordinate system is often used to display the phase angle of a circuit containing resistance, inductive and/or capacitive reactance? When scheduling EME contacts, which of these conditions will generally result in the least path loss? What action or actions should you take if your digital message forwarding station inadvertently forwards a communication that violates FCC rules? Only the question and correct answer is presented. Where must the carrier frequency of a CW signal be set to comply with FCC rules for 60 meter operation? What advantage does a series-L Pi-L-network have over a series-L Pi-network for impedance matching between the final amplifier of a vacuum-tube transmitter and an antenna? What is the radiation pattern of two 1/4-wavelength vertical antennas spaced 1/4-wavelength apart and fed 90 degrees out of phase? How can intermodulation interference between two repeaters occur? Why can an attenuator be used to reduce receiver overload on the lower frequency HF bands with little or no impact on signal-to-noise ratio? What is the approximate physical length of a solid polyethylene dielectric coaxial transmission line that is electrically 1/4 wavelength long at 14.1 MHz? Which of the following is a type of OCFD antenna? What is indicated if the current reading on an RF ammeter placed in series with the antenna feed line of a transmitter increases as the transmitter is tuned to resonance? Why is de-emphasis commonly used in FM communications receivers? What is the radiation pattern of two 1/4-wavelength vertical antennas spaced 1/2-wavelength apart and fed in phase? What is the most common data rate used for HF packet? What is a common use for point-contact diodes? Why is RF attenuation used when direction-finding? What is meant by the term "mode" as applied to an amateur radio satellite? Why should an HF mobile antenna loading coil have a high ratio of reactance to resistance? For which types of out-of-pocket expenses do the Part 97 rules state that VEs and VECs may be reimbursed? How is an interlaced scanning pattern generated in a fast-scan (NTSC) television system? What is the deviation ratio of an FM-phone signal having a maximum frequency swing of plus-or-minus 5 kHz when the maximum modulation frequency is 3 kHz? How is positive feedback supplied in a Pierce oscillator? September 14, 2019: Improved question pool page behavior when "All of these choices are correct" is the correct answer June 22, 2019: Updated email validation to allow new top level domains March 4, 2019: Added new General question pool for exams after Jun 30. Which of the following can be calculated using a Smith chart? What happens to the magnitude of a pure reactance when it is converted to a susceptance? How many times per second is a new frame transmitted in a fast-scan (NTSC) television system? What is an advantage of having a variety of receiver IF bandwidths from which to select? What is "dither" with respect to analog-to-digital converters? What is the modulation index of an FM signal? The correct answer is given in parentheses -- in the example below, it is (C). Why should phase-shifting of a PSK signal be done at the zero crossing of the RF signal? What is the maximum legal carrier frequency on the 20 meter band for transmitting USB AFSK digital signals having a 1 kHz bandwidth? And on the back of the card you will find the correct answer. Which point in Figure E5-1 best represents the impedance of a series circuit consisting of a 300-ohm resistor and an 18-microhenry inductor at 3.505 MHz? What does a receiver noise floor of -174 dBm represent? What is the purpose of a step-start circuit in a high-voltage power supply? Which amateur stations are eligible to be telecommand stations of space stations (subject to the privileges of the class of operator license held by the control operator of the station)? Which of the following reduces the likelihood of receiver desensitization? Which of the following is an aspect of the piezoelectric effect? Which type of atmospheric structure can create a path for microwave propagation? What is the purpose of digital store-and-forward functions on an amateur radio satellite? What is the function of the Vertical Interval Signaling (VIS) code sent as part of an SSTV transmission? How should an antenna analyzer be connected when measuring antenna resonance and feed point impedance? ";s:7:"keyword";s:38:"extra class question pool with answers";s:5:"links";s:896:"<a href="http://sljco.coding.al/o23k1sc/actress-sonamoni-saha-instagram-566a7f">Actress Sonamoni Saha Instagram</a>,
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