Intro to General License Quiz
On which HF and/or MF amateur bands are there portions where General class licensees cannot transmit?
Four HF bands have segments allocated only for Amateur Extra licensees and those are 80 meters, 40 meters, 20 meters and 15 meters.
What does it mean when a U.S. station in the lower 48 states is calling “CQ DX”?
“CQ DX” is a call for distant stations, specifically outside the lower 48 states in this case.
Which of the following would reduce RF interference caused by common-mode current on an audio cable?
Ferrite chokes sometimes are referred to as ferrite beads. The choke usually will stop the flow of RF on the audio cable. This technique is also effective on other cables connected to your computer such as the USB cable and mouse cable. Placing a ferrite choke around the cable would reduce RF interference caused by common-mode current on an audio cable.
What is a dipole antenna with a single center support typically called?
The inverted V name comes from the antenna’s shape when supported at the center.
What happens to the feed-point impedance of a horizontal half-wave dipole as it is lowered toward 1/10 of a wavelength above the ground?
It is a commonly accepted amateur practice, that 20-meter and higher wavelength bands use the upper sideband for voice communications. Thus, using this as a rule, you can deduce that any frequency in the 160-, 75-, and 40-meter and lower wavelength bands use lower sideband for voice.
