------------------------------------------------ I'm attempting to assemble, and remodel for Chinese receiver kit. To improve performance I would like to add frequency displaying and degital attended local ocsillator modified. ------------------------------------------------
This time I will remodel the circuit for incoming of Local oscillator from outside.
To stop local oscillator and make input port of outside oscillator signal, I remove parts and modified circuit as above diagram.
To divert PCB pattern I added local oscillator incoming BNC port on the circuit board as above photo.