Category: Amateur Radio from International Space Station

Azimuth-Elevation (Az-El) Antenna Rotator for Satellite Tracking Low Earth Orbit or LEO amateur radio satellites move across the sky rather fast so that a typical pass of International

Receiving the Morse Code Beacon of Amateur Radio on International Space Station Yesterday I had posted about receiving the voice beacon of AO-91 amateur radio satellite. Today I

How Can You Use 75 Ohms TV Cable for Amateur Radio Feedline? I was using 75 Ohms TV cable for my homebrew 3 x 807 vacuum tube radio

Combining My VHF and UHF Yagis Into a Single Feeder Dual Band Satellite Yagi I had built seven element VHF and five element UHF Yagi antennas earlier. Both

How to Use hams.at for Posting Satellite Activations Recently I came across hams.at as a useful website by WW1X. It was VU2TUM who posted his satellite activations posted

Principle of J Pole Antenna Here is the transcript of the video: J Pole antenna is quite popular among radio amateurs for 2 m and 70 cm bands,

Should You Worry So Much About SWR? I was never worried about SWR or Standing Wave Ratio during my first stint in Amateur Radio in late 1980s. That

Be the First to Record EIRSAT-1 Telemetry! EIRSAT-1 or Educational Irish Research Satellite 1, built by a team of students at University College Dublin is scheduled to be

Trying out Gpredict for Windows, Satellite Tracking Software Earlier I had known that Gpredict software is available for satellite tracking, orbit prediction, Doppler tracking, antenna rotator control and

Important Antenna Parameters Important antenna parameters of interest to the amateur radio operator are gain, bandwidth, radiation pattern, beamwidth, polarization, impedance and radiation resistance. In addition there are