Which of the following digital modes is especially useful for EME communications? [E2D03] A. FSK441 B. PACTOR III C. Olivia D. JT65 Due to the time it takes for signals…

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What do the two numbers represent that are used to define a point on a graph using rectangular coordinates? [E5C11] A. The magnitude and phase of the point B. The…

What happens to reactive power in an AC circuit that has both ideal inductors and ideal capacitors? [E5D09] A. It is dissipated as heat in the circuit B. It is…

What is the typical output impedance of an integrated circuit op-amp? [E7G15] A. Very low B. Very high C. 100 ohms D. 1000 ohms A A. Very low output impedance…

What type of wave is made up of a sine wave plus all of its odd harmonics? [E8A01] A. A square wave B. A sine wave C. A cosine wave…

What do the letters in a satellite’s mode designator specify? [E2A05] A. Power limits for uplink and downlink transmissions B. The location of the ground control station C. The polarization…

Digital modes are the topic of this week’s Amateur Extra exam question…. [E8C13] What is one advantage of using JT-65 coding? A. Uses only a 65 Hz bandwidth B. The…

Ew, this sounds kind of gross, but this aspect of sideband modulation is on the test! [E2B06] What is vestigial sideband modulation? A. Amplitude modulation in which one complete sideband…

Ah, another fine math problem from the Amateur Extra exam (don’t you just love these?) [E5D16] What is the power factor of an RL circuit having a 30 degree phase…

The Amateur Extra question of the week comes from the section on frequency allocations and amateur services… [E1D07] Which amateur service HF bands have frequencies authorized to space stations? A….