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 »
Most of the shortwave radios we we use internally employ the superheterodyne structure for signal up/down conversion in both reception and transmission. Today we are going to talk about the superheterodyne, focusing on analog signal superheterodyne receivers. The SDR architecture of the models, spectrum analyzers, many also use the superheterodyne structure to receive and transmit, …
Any shortwave radio enthusiast likely knows this common knowledge: the 20-meter band is suitable for communication during the day, while the 40-meter band becomes optimal in the evening and at night, with the 20-meter band’s efficacy diminishing. But why is this the case? Let’s focus our discussion on skywave propagation, where our radio waves are …
Great news! We’re excited to announce that the highly sought-after MC-750 portable HF-GP antenna is back in stock. This compact and versatile antenna has been designed to deliver outstanding performance across all HF bands, making it a perfect choice for field operations, POTA, SOTA, and more. Whether you’re a seasoned ham radio enthusiast or just …
MC-750 Portable HF-GP Antenna Now Back in Stock! Get Yours Today! Read More »
Exciting news everyone! We are thrilled to announce the launch of our brand new product, the CS-818 Auto Tuner. This innovative device is the perfect companion for your FT-818/817, offering direct auto control, a built-in screen, and an all-in-one solution for tuning, SWR monitoring, and power measurement. Not only that, but the CS-818 is also …
