Ham radio blog by OZ1BXM

This T2LT antenna is a dipole working on 28 MHz, but it can be scaled to other bands as well. It is often used on the CB-band (27 MHz). The ...

My latest diplomas ( DXCC , QRP DXCC ) were important milestones for me. My next goal is to reach 150 DXCC entities, which will be marked by...

My first DXCC was acquired in 2023. My second DXCC was received in the mail today. It is QRP DXCC, which requires all contacts be made with...

This RS-232 probe is useful when troubleshooting a serial connection. It provides an optical indication of the line state and traffic on the...

This TTL probe is helpful when troubleshooting a serial connection. It provides an optical indication of the line state and traffic on the l...

ADX-S stands for Arduino Digital Transceiver - Superheterodyn. ADX-S is a QRP transceiver with four modes: WSPR, FT8, FT4 and JS8. There are...

Figure 1. I needed a short 70 cm yagi for working the LEO satellites. In earlier years, I've had a 6-element yagi and I was satisfied wi...