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

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...

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...

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....

Amature Radio operators or sometimes better known as Ham radio operators are on the hunt for mystery radio signal that is jamming automotive remotes. Imagine you think your car is locked because you used your remote to lock it, now imagine the horror when you find out its not. Well thats what has...

It’s been a great summer and now we’re back to kick off season 2. In this episode Tommy brings us another great photo tip. This one’s about using your camera’s RAW mode. Jim shows us part one of his recent capacitor building adventure. And George demonstrates the weird ways that some devices...

We’re back with the first episode from our new set. This month Jim runs a few benchmarks to determine if the Apple MacIntel is ready for prime time. IPTV show producers get ready… George hacks the Radio Shack Lavalier Microphone (#33-3013) to add phantom power and better performance....

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...