QSL: Everything You Need to Know

QSL means either “do you confirm receipt of my transmission” or “I confirm receipt of your transmission”. It can also mean “please send me a QSL card”. QSL is a Q-code. QSL Cards A QSL card … Read More


QRN: Everything You Need to Know

Strictly speaking, QRN means “noise from natural sources” as opposed to QRM which means “man-made noise”. The abbreviation QRN is often used in general terms to mean any noise that interferes with the propagation or … Read More


QRSS: Everything You Need to Know

QRSS is a CW mode in which the receiver bandwidth is drastically reduced and the rate at which code is sent is slowed beyond that which would normally be readable by ear. It is named for QRS, … Read More


What is Gain?

Gain compared to a half wave dipole – dBD The gain of an antenna is the relative increase in radiation at the maximum point expressed as a value in decibels (dB) above a standard. The standard to … Read More


What Is Radio Wave Propagation?

Radio wave propagation largely depends on atmospheric conditions, the band and power used to operate the radio equipment. Ground waves are “line of sight” communication. Atmospheric conditions come into play when transmitting between ham radio stations that are farther away … Read More

Call Sign Databases

Radio Call Sign Databases

There are various callsign databases out there. National callsign databases Andorra Antarctica Aruba Argentina Australia Austria Bahrain Belgium Belorussia Bermuda Brazil Bulgaria Bosnia & Herz Canada Canada Crete Cyprus Czech Republic Dominica Ecuador Egypt Estonia … 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

What are harmonics?

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