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Midnight Design Solutions, LLC develops hands-on electronics kits and instruments for amateur-radio experimenters, with a particular focus on compact QRP transceivers, keyers, VFOs and bench tools. Its designs range from the Raspberry Pi Pico-based PicoMite Memory Keyer to the Old Friend, a 6-watt direct-conversion CW transceiver designed by Dave Benson, K1SWL. The company also preserves and advances coherent-CW research, including a low-power transceiver project aimed at copying signals near the noise floor.
Robert Research RadiosRobert Research Radios is Robert’s Research & Radios LLC, a hands-on amateur-radio engineering venture that develops and documents custom software, SDR receiver projects, and hardware modifications. Its work ranges from building a four-tire Mazda TPMS display with RTL-SDR and Python to linking eight HF FT8 bands through KiwiSDR, DigiSkimmer, and GridTracker. The company’s writing is rooted in practical experimentation, reverse engineering, and making existing radio hardware do more.
Ten-TecTen-Tec, now a Dishtronix company, makes amateur-radio transceivers and related equipment, from open-source QRP rigs to its 100-watt Eagle and the forthcoming Phoenix software-defined radio. The company’s nearly fifty-year history includes commercial and government-grade receivers, while its current operation is rebuilding production in a Dishtronix-owned Dayton, Ohio facility. Ten-Tec also continues servicing radios it made when parts are available, preserving a broad legacy of equipment from early kits to modern digital designs.DAYTON, OH
Land BoardsLand Boards designs and makes electronics development boards and modules for makers working with embedded computers, microcontrollers, FPGAs, retro computers and ham radio. Its catalog is especially distinctive for spanning modern platforms such as Raspberry Pi and Arduino alongside dedicated retro-computing hardware and Eurorack synthesizer modules. The company also publishes extensive project documentation through its Land Boards Wiki.CONNELLSVILLE, PA
W2IHY Technologies IncW2IHY Technologies designs and manufactures audio and RF switching equipment for amateur radio stations, with its systems built to work together in transmitting environments where radio-frequency interference and imperfect grounding can disrupt audio. The company is best known for its EQPlus and 8-Band Equalizer, alongside switching gear such as the iPlus and 3×4 Coax Switch, all manufactured in the USA. Designer Julius D. Jones provides technical support directly, and W2IHY products carry a three-year parts-and-labor warranty.STAATSBURG, NY