The K8TND Patriot Regenerative Receiver – $45
Who doesn’t remember their first regenerative receiver with nostalgia? How better to explore the world of shortwave listening than with a regenerative receiver, or to take time and help introduce a beginner with their first radio kit.
The QRPBuilder Patriot K8TND Regenerative Receiver covers the 60, 49, 41, 31, 25 meter shortwave bands and 40, 30 meter amateur bands, (approximately 4.5 to 12.7 MHz), with a receiver you build complete from the supplied chassis pieces, electrical components, and hardware. You connect the receiver to a moderate simple wire antenna, that can be a simple wire in the attic, or one thrown up in a tree. The chassis and component pcb are pre-cut and forms a sturdy distinctive assembly, with the printed circuit board as an integral component of the completed unit.
Cliff Donley (K8TND) has revisited the basic Charles Kitchin (N1TEV) circuit, and heavily modified it, incorporating an FET front end, varactor tuning, toroid inductor, cw audio filter, more stable regeneration, while still making it easy to build. We integrated Cliff’s design into a compact pcb chassis and with controls for Coarse Tuning, Fine Tuning, Regeneration control, Volume and audio passband filter. There is an on board switchable/adjustable 600Hz CW filter and a switched attenuator to prevent strong stations from overloading the input. The audio stage LM386 will drive inexpensive ear buds or a small speaker connected to the rear mounted 3.5mm audio jack. It is powered either by an on-board 9V battery or can use a 12V supply connected to the rear 2.1mm x 5.5mm pcb jack. All the electrical, chassis, and mechanical components are included in the kit with the exception of the battery and earbuds. The receiver is 4.50″ wide x 3.00″ deep x 2.00″ high. On a difficulty scale of 1 to 5, 5 being the most difficult, this is rated at 2 to 3, depending on your experience.
Please let us know how you get along with this project. All comments will be passed along to Cliff.
Visit https://m.short-wave.info/ for a description of the SWBC stations that are available worldwide.
For the assembly manual click here.