160 meters

Top Band -160 Meter Radio Propagation

160 meters, often known as Top Band, is technically Medium Frequency (MF) band, the only one licensed to amateurs. It is slightly higher in frequency than the broadcast band (540 kHz – 1600 kHz) and … Read More

International Events

The International Lighthouse & Lightship Weekend

ILLW – INTERNATIONAL LIGHTHOUSE/LIGHTSHIP WEEKEND The International Lighthouse/Lightship Weekend (ILLW) came into being in 1993 from the Scottish Northern Lighthouses Award[1] weekend by Mike Dalrymple, GM4SUC, a member of the Ayr Amateur Radio Group, Scotland. See … Read More

Q of a circuit

Q Factor and its Relevance in Electrical Circuits

What is Q? The Q or Quality Factor of a resonant circuit is the ratio of stored power to dissipated power in the Reactance and Resistance of the circuit. Generally speaking, a higher Q corresponds to a narrower bandwidth. How is Q Calculated? Note that at resonance, … Read More

Maritime operation

Maritime Radio: Everything You Need to Know

Maritime mobile Amateur radio stations have been installed on ships at sea, both for conventional HF operation and for digital modes such as Winlink. In some countries, a specific block of callsigns is reserved for ocean-going … Read More

Antennas

Antennas: Everything You Need to Know

Antennas are electrical circuits designed to facilitate the transmission and/or reception of electromagnetic radiation. Antennas are specifically designed to transmit/receive as much electromagnetic radiation as possible, whereas most circuits are designed to emit/detect as little … Read More

ISS

How To Contact the ISS (International Space Station)?

The International Space Station is populated by astronauts who are all Amateurs. ISS partner countries USA, Canada, Russia, Europe and Japan, operate ARISS – Amateur Radio on the International Space Station. To downlink is 145.800 FM. (There other frequencies … Read More

Yagi antenna

What Is A Yagi Antenna?

A Yagi-Uda antenna (named for its two Japanese creators) is built around of a half-wave dipole mounted on a perpendicular boom. Behind the dipole, which serves as the one driven element in this antenna, is a parasitic reflector … Read More

APRS

APRS: Automatic Packet Reporting System

APRS operates by receiving packets on a single fixed frequency (on 2 meters this is normally 144.39MHz North America or 144.8MHz Europe), storing them and retransmitting them until they reach a station which can transfer the information … Read More