Ham radio blog by OZ1BXM

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...

My new 23 cm transverter comprises a transverter module and a PA module. Both modules came fully assembled and tested from  SG-LAB  in Bulga...

Last Saturday, I collected my 14 element yagi for 23 cm, my MKU13G2B Kuhne transverter, and my 144 MHz IF radio (Kenwood TR-751E). A recharg...