What Is A DXpedition?
What is it? A DXpedition is an expedition by amateur operators to what is considered an exotic place. These places are “defined” as exotic because of their remoteness or because there are very few radio … Read More
Radio Noise Experiments
Are Compact Fluorescent Lamps (CFL’S) RF Quiet? There has been a lot of exchanging of views about these lamps in the press of late and it revolves around the light output and the initial purchase … Read More
E-Skip: Everything You Need to Know
What is it? The E-layer is the lowest layer of the atmosphere and can typically be found at altitudes between about 80km and 100km. the E-Layer is characterized by high electron densities, and high temperatures … Read More
Amateur radio direction finding: Everything You Need to Know
Amateur radio direction finding (ARDF, also known as radio orienteering and radiosport) is an amateur racing sport that combines radio direction finding with the map and compass skills of orienteering. It is a timed race … Read More
What is a harmonic?
What is a harmonic? A harmonic of a particular frequency (the fundamental frequency f) is a frequency that is an integer multiple of the first one. For example: if f = 125 MHz, the harmonics would … Read More
The 70-Centimeter Band: Everything You Need to Know
The 70-centimeter band is a popular UHF band. Equipment Single-band equipment for 70cm is rare, but many dual-band transceivers are available that operate on both 2 meters and 70cm. Available gear includes base stations, mobile units and HTs. … Read More
TVI: Everything You Need to Know
What is TVI? Simply, TVI is the interference of TV reception by transmissions from another source. In ham radio, we are specifically talking about transmissions from an amateur station, although it is not uncommon for … Read More
What Is Continuous Tone-Coded Squelch System
Continuous Tone-Coded Squelch System Initially, the purpose of this system – also known as tone squelch was to be able to “tune out” of conversations in a shared communications channel. Only stations sharing the same tone could communicate with … Read More
Slow-Scan Television (SSTV)
SSTV is a mode that uses a computer and an amateur radio transceiver to send and receive still images over radio. SSTV was originally an analogue mode based on Frequency Modulation (FM). Digital SSTV has become … Read More
Microphones: Recording, Live Sound, Radio Mics
Basic Operation A microphone converts sound into an electrical signal. Externally in its simplest form, a microphone consists of a PTT (Press To Talk) button, a mouthpiece and a cable to connect it to the … Read More