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...

Using Winrad we look at the activity corner of the display. The Softrock v6.1 is on 40m an MT63 or another multitone mode is on the left 4 PSK31 contacts on the right take up less space.

Schematic of the 4 tube radio, experimentally built in a way of the radio-pioneers (1910-1945). The radio acts as a cascade type receiver when the antenna coil has a high self-inductance, with lower self-inductances of the antenna coil you can put in a mixing process with the oscillator. Perhaps...

WPARC Sponsored video featured at May 2008 club meeting of setting up and controlling your radio via the internet. To find out more about the Western Placer Amateur Radio Club go to http://www.wparc.org.

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....

Observations of electromagnetic (radio) signals on very low frequencies, 0 KHz - 10 KHz. Observed 10 may 2008, approx. 23.00 hour on 4,5. KHz: next to the original radio resonance of 4,5 KHz there is another resonance (spectrum on approx. 10 KHz), that comes in and fades away after 30 minutes....

VHF SSB Weak Signal Highlight Video

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...

The Active Cantenna is Back! But this time we’ve added a Direct TV Satellite Dish to see what wifi improvements, if any, it makes. Tommy brings us some cool night time photography tricks (or treats). Jim finishes the Pudding Cup Capacitor in this episode. And George found a neat Free PDF...

We’re back with the Active Cantenna to finally do some range testing. Thanks to Amateur Radio and a couple of video cameras, we put you right in the action. Ride “Shotgun� with Jim as we test WiFi’s advertised 3002 range. We were pleasantly surprised…. There are more great web sites...