Ham radio blog by OZ1BXM

I've decided to challenge myself and pursuit 100 entities using FT8. My experience with FT8 is not long as I've had only 25 QSO'...

After some years of non-activity, I've decided to operate 144 MHz EME again. The equipment is in store, and I want continue in this exci...

Our refrigerator must run at +5C at all times. But one day, the security relay of the house flipped and cut the power off. The power outage ...

Many electronic modules are controlled by the I2C-protocol. I2C builds upon the concept of masters and slaves connected via a 2-wire bus. Th...

Fig. 1. DC-receiver seen from the front. Building your own equipment is not difficult if you buy ready-made modules and connect them togethe...

  Fig. 1. Valve transmitter. Building this transmitter was inspired by an article in "Popular Electronics" 2/1955. The circuit dia...

I've used Network Time about 6 months. However, the PC clock deviation could be 500 ms or more during a day. This amount of drift is not...