Simplex

What is Simplex in Radio Amateur?

In radio-amateur use, the term “simplex” is used to refer to bi-directional communication on a single frequency – distinguishing this mode of operation from the use of repeater stations which receive on one frequency while simultaneously … Read More

What is the best way to learn Morse

What is the best way to learn Morse?

There appear to be two main schools of thought regarding the best way to approach learning Morse code. Block The “traditional” way is to memorize all the characters, receive them slowly at first, and gradually ramp … Read More

DTMF

What is DTMF? (dual tone multi frequency)

DTMF Dual Tone Multi-Frequency DTMF is used in ham radio in applications such as IRLP and Echolink, as a means to dial outside numbers via phone patch and as a means for repeater owners to configure the system remotely. It is … Read More

Squelch

What is Squelch?

In telecommunications, squelch is a circuit function that acts to suppress the audio (or video) output of a receiver in the absence of a sufficiently strong desired input signal. Squelch is widely used in two-way radios to suppress … Read More

Antenna loading coil

Antenna loading coil: Everything You Need to Know

An antenna loading coil is an inductor placed in series with an antenna element in order to lower the antenna’s resonant frequency. A standard dipole antenna is resonant if constructed with a length of one-half wavelength. A vertical antenna (effectively half … Read More

The Complete Guide to Weak Signal Propagation Reporter

WSPR Weak Signal Propagation Reporter WSPR (usually pronounced “whisper”) is a software application that uses the transmission mode MEPT-JT (Manned Experimental Propagation Transmitter – Joe Taylor). In MEPT transmissions, the radio becomes a beacon that transmits for just under … Read More