Robert 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.
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Midnight Design Solutions, LLCMidnight 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.FOREST HILL, MD
Nuand LLCNuand LLC builds the bladeRF family of open-source software-defined radios, including USB 3.0 platforms that cover 47 MHz to 6 GHz and support programmable FPGA signal processing. Its bladeRF 2.0 micro is made in the USA and pairs compact 2×2 MIMO hardware with published schematics, open-source libraries and platform HDL. Nuand also develops bladeRF-wiphy, an open-source IEEE 802.11 modem that runs directly on the radio’s FPGA.NEW YORK, NY
ARTEMIS, IncARTEMIS, Inc. is a vertically integrated system house that designs, manufactures, assembles, and tests radar hardware and software-defined radar systems. Its SlimSDR supports SAR, MTI, ESM, communications, and other modes for applications from the ground to the stratosphere, serving reconnaissance, remote sensing, aerospace, defense, scientific, airborne, spaceflight, and satellite programs.HAUPPAUGE, NY
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