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...

Best viewed in high quality. Burt, K1OIK reviews the Flex 5000A Software Defined amateur radio.

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...

TS850

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...

I recently visited Lyme Regis UK. Like all good hams I took along my wireless kit. I setup my FT-817 and MP-1 vertical antenna and worked some PSK-31 DX. I shot this with my Canon SD750 digital still camera using the video mode. It worked pretty good. Several times I had to empty the memory...