Precision HF upconverter for SDR radio, Quansheng K5

• two antenna inputs UHF and HF select switch, LED lights active input
• middle SMA connector need connect to RTL SDR tuner dongle antenna input
• at a time two antenna connections
• News: Adjustable Local level, HF preamplifier gain, and Output level optimized settings for SDR receiver
• High sensitivity converter
• The USB A and (USB mini B optional) connectors for +5V power supply
• Local frequency: 100.0000 MHz (sine)
• High-precision local oscillator
• Operating frequency is 100KHz to 54MHz 
   - 1.8MHz = 101.8MHz 
   - 3.5MHz = 103.5 MHz etc.
• 3x good quality SMA connectors
•  PCB size 5cm x 3cm