FREE Ham Radio Extra Class General Questions and Answers
When an antenna analyzer is being used to assess SWR, which of the following must be attached to it?
Antenna analyzer costs have significantly decreased during the past 12 months. Some models lack some of the more expensive models' feature set. However, even the more affordable models provide you with the essential details regarding your antenna system. The antenna in its final configuration must be connected to the feedline's other end, which must be connected to the antenna analyzer. The feedline end that will be linked to your transmitter has the antenna analyzer attached. In order to perform SWR (standing wave ratio) measurements, the antenna analyzer must be linked to the feed line and antenna.
What kind of messages can an amateur station send to a third party in another nation?
You should always confirm whether the United States has third-party agreements with the nation you are about to communicate with using third-party communications by consulting the FCC Rules and Regulations Part 97.113 or the ARRL's website at arrl.org before engaging in any third-party communications. An amateur station may send messages for a third party in another nation that are related to amateur radio, statements of a personal nature, or messages about emergencies or disaster aid.
What abilities discovered when searching for hidden transmitters are beneficial to the Volunteer Monitoring Program?
"Fox hunts" or events involving hidden transmitters are frequently held by amateur radio clubs. A member, the fox, goes here and hides in a certain location. The remaining team members, the hounds, use their abilities as hidden transmitters to find the fox. The competition typically concludes with a picnic, and the winner gets to be the fox for the following round. It is possible to discover stations that are breaking FCC regulations by using direction finding techniques, directional antennas, and signal attenuation.
When radio waves with frequencies above and below the LUF are launched into the ionosphere, what typically happens to them?
The MUF (maximum useful frequency) and LUF (lowest useable frequency) are the maximum and minimum operating frequencies, respectively. Your signals are emitted via the non-ionized atmosphere if you are above the MUF, where they are never picked up. Your signals are absorbed by the ionized atmosphere if you are below the LUF. In order to assure the finest radio conditions, it is essential to operate in the "sweet spot" between MUF and LUF. When radio waves are launched into the ionosphere, those with frequencies below the MUF and above the LUF are bent back to Earth.
Which of the following best sums up how a speech processor affects a phone signal being transmitted with just one sideband?
The majority of contemporary transceivers come with a speech processor. The speech processor maintains a higher level in the low amplitude regions of your speech pattern. As a result, your average power increases while having no impact on your overall PEP (peak envelope power). The average power coming from your transmitter with the speech processor activated would increase if you were using an SSB averaging wattmeter as opposed to a PEP wattmeter. A contemporary transceiver's speech processing boosts average power.
What is a Beverage antenna used for primarily?
One of the least known antennas, the beverage antenna has a variety of applications. The antenna can either be placed directly on the ground or elevated a few feet above it. BOG antennas (Beverage on the Ground) are useful for directional receiving as well. Many hams have Beverage antennas pointing in various directions, typically toward Europe and Asia. The main application of a beverage antenna is directional receiving for the low HF bands.
What frequency band does a 3-kHz USB signal fall into when the carrier frequency is indicated as 14.347 MHz?
Let's use the information that has been provided: USB, a carrier frequency of 14.247 MHz, and a signal that is 3 kHz wide. We will increase the carrier frequency by 3 kHz to obtain the highest frequency since we are using USB. The maximum frequency is 14.350 MHz (or 14.347 MHz + 3 kHz (or 0.003 MHz)). It is not advised that you work this close to the band edge as a best practice. You will be operating outside the amateur band if your dial calibration is even slightly off in the wrong way. You might have splatter outside the 20-meter band if your transmitter is just a little bit overdriven. Since there shouldn't be any emissions from an SSB signal over USB below the carrier frequency, the lower limit will 14.347 MHz + 0 = 14.347 MHz, which stays constant. Therefore, when the displayed carrier frequency is set to 14.347 MHz, a 3-kHz USB (upper sideband) signal operates in the frequency range of 14.347 to 14.350 MHz.