In the world of amateur radio, making contacts with operators across the globe has always been a thrilling experience. One particularly exciting way to achieve this is through **satellite communication**. Today, BD7LLY will introduce what satellites are, how they relate to amateur radio, the different types of satellites, how they move, and what you need …
ATV (Amateur Television) is a form of amateur radio communication that allows operators to transmit television signals over radio waves. Unlike traditional voice or data communication, ATV enables the transmission of both video and audio, similar to what we experience in conventional TV broadcasts. However, ATV operates on amateur radio frequencies, which gives it a …
In the world of amateur radio and RF (radio frequency) devices, toroid ferrite cores play a crucial role, though they are often overlooked. This article will guide you through the basics of toroid ferrite cores, explain their uses, and explore different types of ferrite materials like FT240-43 and Type 31, which are essential for various …
Understanding Toroid Ferrite Cores: From FT240-43 to Type 31 Materials Read More »
Hello everyone! Many hams have asked us whether the JPC-12 antenna can operate on the 80m band. The answer is yes. Today, we’ll talk about how to make the JPC-12 antenna operate on the 80m band and share some optimization tips. Hope you find it helpful! To make the JPC-12 operate in the 80m band, …
When it comes to digital broadcasting, we’ve surely heard of DRM broadcasting. Today, let’s briefly discuss what DRM is. DRM stands for Digital Radio Mondiale, with “Mondiale” being an Italian and French word meaning “world,” so DRM broadcasting can be referred to as global digital broadcasting. DRM is an open standard adopted by many countries …
An Introduction to DRM Broadcasting: What Exactly is DRM? Read More »
Most enthusiasts familiar with shortwave should have used or heard about BALUN (Balanced to Unbalanced) at some point. A typical application scenario is connecting a BALUN between a balanced antenna and coaxial cable. What is its purpose? BALUNs serve various functions, such as balancing to unbalance conversion, suppressing common mode current (CMC), impedance transformation, and …
BALUN Series 1 – Current BALUN, Common Mode Current (CMC) Read More »
In our daily lives, we often overlook the potential applications of certain technologies until crucial moments reveal their immeasurable value. Recently, in an emergency situation in New Jersey, Dave, KD2GIY, played a crucial role utilizing the amateur radio station’s APRS (Automatic Packet Reporting System) and the 2m frequency band. He became a key factor in …
Amateur radio to the rescue in emergencies: the power of APRS and 2m Read More »
In shortwave radios, the function of filters is to eliminate unwanted signals, allowing the receiver to only capture the signals of interest. Filters are broadly classified into three categories, as also encountered in the Amateur Radio Class B exam: high-pass, band-pass, and low-pass filters. Their meanings are as follows: While these concepts are straightforward, the …
Today i’m setting up my M-104 antenna on the roof. There are many ways to set it up but today i used it as a portable GP, vertical polarized. I used a clamp and mount the base to a railing. M-104 does require a good counterpoise, I used the ring terminal comes with M-104 and …
We all know that when an antenna resonates at a specific frequency, its efficiency is at its highest. When making or purchasing antennas, we often observe and adjust their resonance conditions (such as finding a lower VSWR value) by modifying the length of the antenna elements, among other factors. We also understand that for the …
Is it true that with an antenna tuner, everything is an antenna? Read More »
