Ujjdwiurgh Portable Shortwave Radio Transceiver USDX SDR QRP Transceiver 3-Band Amateur Radio Equipment with Handheld Microphone

Adopting the open source public version design of usdx, adding personal elements: audio preamplifier TDA1308, so that the volume can be controlled by the knob handle diameter The antenna base adopts a variable design, which can be installed with an SMA base or a BNC elbow base The 12V to 5V power supply part uses the expensive LT1805, so that the rear circuit does not have to worry about the danger of high heat damage to the 7805 type voltage regulator tube caused by insufficient current Amateur working frequency band: 40m, 15m, 20m The power is not more than 5W, which meets the standardized QRP. The LCD screen is 1602