What is Hellschreiber. Hellschreiber is a German name, meaning "bright writing", or "clear writing". Hellschreiber is anything but a new mode. It was first patented in 1929 which makes it the oldest machine generated data transmission mode used in amateur radio. To put this in perspective, SSB...

Operating my station remotely. I use three pieces of software. First is TRX-Manager to control the radio. See my video on TRX-Manager. Second, remote desktop software. This allows me to control the radio computer from a remote computer. I use Logmein.com free program to manage and setup the...

Experimental receiver for VLF. I received electromagnetic (radio) signals between 14 and 22 KHz with a capacitor of 4,7 NF over the showed coil. The schematic is identical to that of the storm detector IV (with the 6088 Tube), the coil is differently constructed. There is one more transistor...

In this video I explain what DSTAR is and describe some of the neat features that it has.

Some 30 years ago this picture was received from Venezuela on early SSTV. Then no home computers could handle the speed needed to display the picture, more...no re transmitted using modern software MMSSTV

Clegg 99er is a Compact top quality 6 meter transceiver made in 1961. LCF School LCFschoolThis is a tube unit and will operate on 110vac with a built in power supply or external 12 volt unit. The transmitter is crystal controlled and receiver covers the lower 2 Mhz of the 6 meter amateur...