UsDX 5W SDR QRP QCX-SSB to SSB 3-Band All-Mode HF Transceiver with Handheld Microphone

Open-source UsDX SDR transceiver—5W QRP QCX-SSB to SSB design, covering three HF bands and supporting all operating modes; includes a handheld microphone. The front end has been upgraded with a TDA1308 audio amplifier, providing a conventional, tactile volume knob for immediate, responsive level adjustment instead of relying on menu-only controls. Power conversion is handled by a high-quality LT1805 regulator that converts 12V to 5V; this prevents the rear circuitry from suffering the current limitations and overheating problems commonly seen with 7805 regulators. By using the robust LT1805 the unit also avoids the high heat damage associated with standard 7805 devices, delivering more reliable and durable operation. A flexible antenna base accepts either an SMA seat or a BNC elbow seat, giving you straightforward options for antenna connections.