Ham radio blog by OZ1BXM

I visited a ham radio rally (the name is ATF) in Odense in November. The town of Odense is situated on the island of Fyn. This town is often...

I let WSPR run on 30 meters during 13 days of October 2016. The purpose was to learn how my antenna performed on 10 MHz. My antenna is a l...

I had my first experience with WSPR in 2009 and I wrote a piece about WSPR  on my blog. Three months later, I published another piece:  Reac...

The Code Practice Oscillator pictured below was developed by me. It is simple and easy to build. It is based on the 555 oscillator IC and i...

I watched a movie yesterday on Danish television: The Big Year from 2011 starring Steve Martin , Jack Black , and Owen Wilson . Two bird en...

I've had a strange experience with my HF-antenna. Here follows the story: Something was wrong with my antenna. I could not achieve the...

I wanted to measure distortion in my 2m SSB-transmitter and PA. A two-tone test generator (see chapter 4.5 in  this document ) can reveal di...