By Dominique F1FRV
Asked by Alexander, an Ukrainian friend, to study how to increase number of switchings of his SDR-1000, to allows for up-to 8 or 9 antennas for his "antenna farm", i made this ...
The total cost is very low. Be careful in handling MOS device, as, when not in circuit, they are VERY sensitive to static discharges.
Download this file with PCB typons: SDR-1000.ZIP