Amateur radio 40m ssb contest sdr view

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...

2008 W2RE finished a 4 month antenna project that swapped out antennas and added antennas to maximize gain using HFTA. The new antennas and stacks will maximize gain with the guide of the HFTA (N6BV) software.

Tube radio with 4 tubes, experimental, schematic comes later.

The Russian R161 radio station - Movie by G4PYM - full version

Telephone and telegraph from the Your Life work series - 1946 - Vocational Guidance Films, Inc.