F4EXB's channel

Test of a DFB laser diode at 1570nm. This is a NEL NLK1556STB 20mW fiber coupled module in a 14 pin butterfly package with SC/APC connector. It has...

This 1mn video shows the recording of my CCD camera with a 135mm tele lens at night. This CCD as every CCD without IR blocking filter is sensitive ...

Red laser diode 5mW in 150mm diameter telescope as beam expander seen from 1km distance. Video ends with the spot on the wall (corner). It is movin...

This is my first antenna for HF bands and also my first attempt at PSK31 mode. Antenna is a delta loop of almost 20m perimeter. Antenna wire is not...