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...

This is a one valve [tube] radio that believe it or not I constructed 48 years ago. It remained lost but was discovered again during a recent house move. The valve used is a battery R.F. pentode dating from around 1948 on a B7G base. The type number is DF91 or the American equivalent, the 1T4....

This video shows how to install a NMO type antenna mount..It was mounted on a 2009 Ford F-150 pickup truck at Kcomm the ham radio store in San Antonio, Tx..I aquired my brother Tim KE5CFZ to help me.. The NMO mount requires a 3/4" hole which was drilled thru the roof just in front of the cargo...

Back from a long summer vacation, George and Tommy visit the Capitol City Hamfest and run into an old friend. Peter shows us how to create a warm spot. Plus plenty of Amateur Radio news and Viewer email.

The guys are back with more tech and entertainment for the all purpose geek. Jim talks about the OSI and Packet Sniffing with Ethereal. George teaches us how to solder like a pro. And Tommy’s ‘Camera Raw Files(The SQL)’ demonstrates some neat tricks you can do.

Just in time, Tommy brings us some Cold Weather Photo Tip. Jim shows us a unique method for salvaging electronic components from PC boards. And George demonstrates the electric Dixie Cups and String, a quick and dirty intercom you can build from household items. Plus we cover some viewer mail...