Has the HA8ET low-noise preamp proven effective at 144 MHz in a VHF PA? But let’s start with a tip that might come in handy for portable transmitting. TIP: Connecting…
Tag: SDR
SDR (Software-defined radio) is a transceiver technology where signal filtering and processing are handled by software.
VKV PA – November 2022
How to Score Over 5,000 Points in VKV PA? A Practical Guide from A to Z. It starts with an alarm at 6:00 a.m. After loading the rest of my…
VKVPA – July 2022
Have you ever seen the ON4KST chat on a cell phone screen? That was also the topic of the July VKVPA event, held once again at Vlčí vrch near the…
SDR Spectroscope for an R2CW VHF Transceiver
The R2CW is a VHF CW/SSB transceiver with outstanding performance. This makes it ideal for contest use. A drawback of this transceiver is that it lacks some of the features…
VKVPA – April 2022
Is it possible to make up twenty minutes in a 180-minute race like the VKVPA? And why was it necessary to make up the lost time? I had several new…
QRP Encounter with QRO in the 2021 CQ WW DX SSB Contest
Eva Borušovičová wrote: “Family members of amateur radio operators know that there are dates on the calendar when they can’t celebrate birthdays, get married, or even die suddenly, because the…
How did the 2020 SSB League unfold?
I participate in this 80-meter contest fairly often, but only during the first hour. These are very good contests that allow even beginners without language or operating skills to make…
Measurement of the FR13L LTE Filter for QO-100
Given the margin in the QO-100 receiver’s input, I added an FR13L TV LTE filter to the RX path before the RTL-SDR receiver. Its specified parameters are as follows: Passband…
One Hundred Connections via QO-100
Every day, more stations are joining the network, establishing connections via QO-100. According to online log statistics, there are already about 500 of them, and even relatively exotic destinations such…
Upgrades for the QO-100 satellite
The setup for operating via the QO-100 satellite has changed slightly. The new version of SDR Console 3.0.7 introduces an automatic frequency offset correction feature. It works by selecting a…
QO-100 / Es Hail 2 satellite
Es Hail 2 (QO-100) is a new-generation satellite that enables amateur radio communication. The main difference from other satellites is that it is a geostationary satellite orbiting at an altitude…