Useful tips for everyday
How do I know which antenna to use? The farther the tower is from your location, the more likely you will need an outdoor or…
What do negative numbers mean in temperatures? Negative numbers are numbers that are less than zero. In this context, positive temperatures are warmer than the…
How much gain does a 1/4 wave vertical antenna have? So on a scale of dBd (gain referenced to a dipole) a 1/4 wave vertical…
How far will 25w transmit? For example, a 25-watt marine radio will roughly have a maximum range of 60 nautical miles (111 km) between antennas…
What is antenna noise temperature What are the major factors that decide the antenna noise temperature? The antenna noise temperature depends on antenna coupling to…
What is the exchange for Field Day? For the North American Field Day, the exchange consists of the station call sign, the name of the…
Can a satellite dish be used as a radio antenna? You can use a satellite TV dish antenna for amateur radio use but how you…
How do surveyors find north? Declination: The difference between magnetic north and geographic (true) north. Surveyors used a compass to determine the direction of survey…
How is laser light different from incoherent light source? The major difference between laser light and light generated by white light sources (such as a…
What are foam earplugs made of? Foam earplugs, mainly made from either polyvinyl chloride (PVC) or polyurethane (PU) (memory foam), which are compressed (rolled) and…