Johnson's Techworld

LMR SDR 1.1 is a popular software defined radio design by YE3CIF, being popularized in this region among amateur radio homebrewers by VU3ZOF. For convenience we will discuss

Though I had bought the LMR SDR 1.1 board from VU3ZOF with Si5351 clock generator pre soldered as it was a tiny SMD component, later I found that

I had used 1N4148 diode instead of the 1N34A germanium diode when I homebrewed N5ESE Classic RF Probe a few days back as the latter was not available

Sidereal time is a “star-based” timekeeping system used by astronomers to measure Earth’s rotation relative to fixed stars rather than the Sun. A sidereal day lasts 23 hours,

The AMS1117-5.0V is a popular low-dropout (LDO) linear voltage regulator designed to provide a stable 5V output at currents up to 1A. It is widely used in electronic

When I received the LMR SDR 1.1 kit of components and PCB separately, I had no idea of where to start. In case of my previous Easy BITX

VU3GEX had painstakingly compiled several of these LMR SDR 1.1 kits and distributed it to several potential homebrewers in 2023. Some of them moved on to other projects

Adruino IDE in laptop Easy BITX not there after uploading Si5351 calibration sketch Signal from Si5351 in Raduino picked up by FT-710 used as frequency counter Arduino Serial

Last time when I tried a Space Station pass, I was receiving a few stations, but could not reach them. This time it was a high elevation pass

N2YO.COM is my favourite site for checking amateur radio satellite passes, especially International Space Station. Today when I visited that site for checking a Space Station pass which